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Upgrade addr2line and properly handle split DWARF on Linux #513

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merged 7 commits into from
May 23, 2023

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khuey
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@khuey khuey commented Jan 30, 2023

This doesn't actually implement loading for split DWARF but it will make backtrace continue to compile with the existing functionality once addr2line cuts a new release.

Cc @philipc

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philipc commented Apr 16, 2023

addr2line 0.20.0 has been released.

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khuey commented Apr 18, 2023

Ok the latest csets I've pushed support packed split DWARF on Linux. They don't yet support unpacked split DWARF (that's harder because we need to load the DWOs and presumably stash them somewhere). And bumping addr2line causes the MSRV test to start failing.

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philipc commented Apr 19, 2023

Is it possible to add a CI test for this?

They don't yet support unpacked split DWARF (that's harder because we need to load the DWOs and presumably stash them somewhere).

We could hash by DWO id, but an alternative would be to change SplitDwarfLoad to include the ResUnit index, and add an API to query the number of ResUnits so that we can preallocate a Vec for lazy loading (similar to unpacked Mach-O).

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khuey commented Apr 19, 2023

There is a CI test for this.

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philipc commented Apr 19, 2023

There is a CI test for this.

Oh, so there is, but I must be missing something still. How was it passing before this PR?

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khuey commented Apr 19, 2023

What you're missing is that it's not passing before this PR. These tests are failing on the tip of this repo.

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khuey commented Apr 19, 2023

so that we can preallocate a Vec for lazy loading (similar to unpacked Mach-O).

What's the point of preallocating the Vec here? search_object_map still takes &mut self to modify it. It looks like Mach-O gives indexes to tell you which object file to use, so having something you can index is helpful?

DWARF just gives us file paths and DWO ids. I think we'd want a HashMap here, but that's not available in alloc. We could do a BTreeMap on the paths, or just linearly search a Vec. Regardless preallocating doesn't seem to do any good with DWARF, unless I'm missing something.

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philipc commented Apr 19, 2023

The difference from Mach-O that I overlooked is that addr2line is internally doing the indexing itself. I don't think we actually need to look up anything. addr2line isn't going to ask for the same DWO twice. All we need is somewhere to stash it before returning it to addr2line, so we could just append to a Vec.

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khuey commented Apr 20, 2023

Hmm, yes, addr2line's ResUnit will cache the gimli::Dwarf for the DWO, and backtrace's Context contains addr2line's Context, so that does sound right.

Perhaps instead of having mmap_aux and mmap_dwp in Stash we should just have an append-only Vec<Mmap> like we do for Stash::buffers.

@khuey khuey force-pushed the addr2line-0.20 branch 3 times, most recently from f26919e to dd9e13d Compare April 20, 2023 05:09
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khuey commented Apr 20, 2023

And that adds support for unpacked split DWARF, passing all the relevant tests.

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khuey commented Apr 21, 2023

Does @philipc review changes for this repo too?

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philipc commented Apr 22, 2023

I don't approve PRs in this repo. LGTM though.

@khuey khuey changed the title Handle addr2line API changes. Upgrade addr2line and properly handle split DWARF on Linux Apr 22, 2023
@philipc philipc mentioned this pull request Apr 27, 2023
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khuey commented Apr 27, 2023

It would be nice to get this merged and a new release cut. Split DWARF inlining was turned off by default in 1.68.

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r? @rust-lang/crate-maintainers could someone review this? I think this is kinda notable change but I'm not familiar enough to review exhaustively.

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khuey commented May 14, 2023

Realistically I don't know that you're going to find a reviewer with more subject matter expertise than me and @philipc here.

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LGTM to my limited understanding of DWARF. I trust @philipc to have reviewed this properly.

src/symbolize/gimli/elf.rs Outdated Show resolved Hide resolved
@Amanieu Amanieu merged commit ef961e2 into rust-lang:master May 23, 2023
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khuey commented May 29, 2023

Can we get a new release with this?

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It would be nice if we passed the test suite on the commit we cut our release from. I will make sure a release is cut once #531 is resolved.

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backtrace 0.3.68 is out, let us know if there are any bugs to be squashed!

kodiakhq bot referenced this pull request in X-oss-byte/Canary-nextjs May 1, 2024
[![Mend Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [backtrace](https://togithub.com/rust-lang/backtrace-rs) | dependencies | patch | `0.3` -> `0.3.71` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

---

### Release Notes

<details>
<summary>rust-lang/backtrace-rs (backtrace)</summary>

### [`v0.3.71`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.71)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.70...0.3.71)

This is mostly CI changes, with a very mild bump to our effective cc crate version recorded, and a small modification to a previous changeset to allow backtrace to run at its current checked-in MSRV on Windows. Sorry about that! We will be getting 0.3.70 yanked shortly.

##### What's Changed

-   Make sgx functions exist with cfg(miri) by [@&#8203;saethlin](https://togithub.com/saethlin) in [https://github.com/rust-lang/backtrace-rs/pull/591](https://togithub.com/rust-lang/backtrace-rs/pull/591)
-   Update version of cc crate by [@&#8203;jfgoog](https://togithub.com/jfgoog) in [https://github.com/rust-lang/backtrace-rs/pull/592](https://togithub.com/rust-lang/backtrace-rs/pull/592)
-   Pull back MSRV on Windows by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/598](https://togithub.com/rust-lang/backtrace-rs/pull/598)
-   Force frame pointers on all i686 tests by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/601](https://togithub.com/rust-lang/backtrace-rs/pull/601)
-   Use rustc from stage0 instead of stage0-sysroot by [@&#8203;Nilstrieb](https://togithub.com/Nilstrieb) in [https://github.com/rust-lang/backtrace-rs/pull/602](https://togithub.com/rust-lang/backtrace-rs/pull/602)
-   Cut backtrace 0.3.71 by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/599](https://togithub.com/rust-lang/backtrace-rs/pull/599)

##### New Contributors

-   [@&#8203;jfgoog](https://togithub.com/jfgoog) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/592](https://togithub.com/rust-lang/backtrace-rs/pull/592)
-   [@&#8203;Nilstrieb](https://togithub.com/Nilstrieb) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/602](https://togithub.com/rust-lang/backtrace-rs/pull/602)

**Full Changelog**: rust-lang/backtrace-rs@0.3.70...0.3.71

### [`v0.3.70`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.70)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.69...0.3.70)

##### New API

-   A `BacktraceFrame` can now have `resolve(&mut self)` called on it thanks to [@&#8203;fraillt](https://togithub.com/fraillt) in [https://github.com/rust-lang/backtrace-rs/pull/526](https://togithub.com/rust-lang/backtrace-rs/pull/526)

##### Platform Support

We added support for new platforms in this release!

-   Thanks to [@&#8203;bzEq](https://togithub.com/bzEq) in [https://github.com/rust-lang/backtrace-rs/pull/508](https://togithub.com/rust-lang/backtrace-rs/pull/508) we now have AIX support!
-   Thanks to [@&#8203;sthibaul](https://togithub.com/sthibaul) in [https://github.com/rust-lang/backtrace-rs/pull/567](https://togithub.com/rust-lang/backtrace-rs/pull/567) we now have GNU/Hurd support!
-   Thanks to [@&#8203;dpaoliello](https://togithub.com/dpaoliello) in [https://github.com/rust-lang/backtrace-rs/pull/587](https://togithub.com/rust-lang/backtrace-rs/pull/587) we now support "emulation-compatible" AArch64 Windows (aka arm64ec)

##### Windows

-   Rewrite msvc backtrace support to be much faster on 64-bit platforms by [@&#8203;wesleywiser](https://togithub.com/wesleywiser) in [https://github.com/rust-lang/backtrace-rs/pull/569](https://togithub.com/rust-lang/backtrace-rs/pull/569)
-   Fix i686-pc-windows-gnu missing dbghelp module by [@&#8203;wesleywiser](https://togithub.com/wesleywiser) in [https://github.com/rust-lang/backtrace-rs/pull/571](https://togithub.com/rust-lang/backtrace-rs/pull/571)
-   Fix build errors on `thumbv7a-*-windows-msvc` targets by [@&#8203;kleisauke](https://togithub.com/kleisauke) in [https://github.com/rust-lang/backtrace-rs/pull/573](https://togithub.com/rust-lang/backtrace-rs/pull/573)
-   Fix panic in backtrace symbolication on win7 by [@&#8203;roblabla](https://togithub.com/roblabla) in [https://github.com/rust-lang/backtrace-rs/pull/578](https://togithub.com/rust-lang/backtrace-rs/pull/578)
-   remove few unused windows ffi fn by [@&#8203;klensy](https://togithub.com/klensy) in [https://github.com/rust-lang/backtrace-rs/pull/576](https://togithub.com/rust-lang/backtrace-rs/pull/576)
-   Make dbghelp look for PDBs next to their exe/dll. by [@&#8203;michaelwoerister](https://togithub.com/michaelwoerister) in [https://github.com/rust-lang/backtrace-rs/pull/584](https://togithub.com/rust-lang/backtrace-rs/pull/584)
-   Revert 32-bit dbghelp to a version WINE (presumably) likes by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/588](https://togithub.com/rust-lang/backtrace-rs/pull/588)
-   Update for Win10+ by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/589](https://togithub.com/rust-lang/backtrace-rs/pull/589)

##### SGX

Thanks to

-   Adjust frame IP in SGX relative to image base by [@&#8203;mzohreva](https://togithub.com/mzohreva) in [https://github.com/rust-lang/backtrace-rs/pull/566](https://togithub.com/rust-lang/backtrace-rs/pull/566)

##### Internals

We did a bunch more work on our CI and internal cleanups

-   Modularise CI workflow and validate outputs for binary size checks. by [@&#8203;detly](https://togithub.com/detly) in [https://github.com/rust-lang/backtrace-rs/pull/549](https://togithub.com/rust-lang/backtrace-rs/pull/549)
-   Commit Cargo.lock by [@&#8203;bjorn3](https://togithub.com/bjorn3) in [https://github.com/rust-lang/backtrace-rs/pull/562](https://togithub.com/rust-lang/backtrace-rs/pull/562)
-   Enable calling build.rs externally v2 by [@&#8203;pitaj](https://togithub.com/pitaj) in [https://github.com/rust-lang/backtrace-rs/pull/568](https://togithub.com/rust-lang/backtrace-rs/pull/568)
-   Upgrade to 2021 ed and inline panics by [@&#8203;nyurik](https://togithub.com/nyurik) in [https://github.com/rust-lang/backtrace-rs/pull/538](https://togithub.com/rust-lang/backtrace-rs/pull/538)
-   Fix deny(unused) of an unused import with SGX + Miri by [@&#8203;saethlin](https://togithub.com/saethlin) in [https://github.com/rust-lang/backtrace-rs/pull/581](https://togithub.com/rust-lang/backtrace-rs/pull/581)
-   Fix unused_imports warning on latest nightly by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/575](https://togithub.com/rust-lang/backtrace-rs/pull/575)
-   Fix CI by [@&#8203;saethlin](https://togithub.com/saethlin) in [https://github.com/rust-lang/backtrace-rs/pull/582](https://togithub.com/rust-lang/backtrace-rs/pull/582)
-   Use `addr_of!` by [@&#8203;GrigorenkoPV](https://togithub.com/GrigorenkoPV) in [https://github.com/rust-lang/backtrace-rs/pull/585](https://togithub.com/rust-lang/backtrace-rs/pull/585)
-   Write down MSRV policy by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/561](https://togithub.com/rust-lang/backtrace-rs/pull/561)
-   Apply clippy::uninlined_format_args fixes by [@&#8203;nyurik](https://togithub.com/nyurik) in [https://github.com/rust-lang/backtrace-rs/pull/486](https://togithub.com/rust-lang/backtrace-rs/pull/486)
-   ignore clippy lints in `symbolize/gimli/stash.rs` by [@&#8203;onur-ozkan](https://togithub.com/onur-ozkan) in [https://github.com/rust-lang/backtrace-rs/pull/586](https://togithub.com/rust-lang/backtrace-rs/pull/586)

##### New Contributors

-   [@&#8203;nyurik](https://togithub.com/nyurik) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/538](https://togithub.com/rust-lang/backtrace-rs/pull/538)
-   [@&#8203;bzEq](https://togithub.com/bzEq) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/508](https://togithub.com/rust-lang/backtrace-rs/pull/508)
-   [@&#8203;bjorn3](https://togithub.com/bjorn3) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/562](https://togithub.com/rust-lang/backtrace-rs/pull/562)
-   [@&#8203;sthibaul](https://togithub.com/sthibaul) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/567](https://togithub.com/rust-lang/backtrace-rs/pull/567)
-   [@&#8203;mzohreva](https://togithub.com/mzohreva) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/566](https://togithub.com/rust-lang/backtrace-rs/pull/566)
-   [@&#8203;wesleywiser](https://togithub.com/wesleywiser) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/569](https://togithub.com/rust-lang/backtrace-rs/pull/569)
-   [@&#8203;kleisauke](https://togithub.com/kleisauke) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/573](https://togithub.com/rust-lang/backtrace-rs/pull/573)
-   [@&#8203;roblabla](https://togithub.com/roblabla) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/578](https://togithub.com/rust-lang/backtrace-rs/pull/578)
-   [@&#8203;michaelwoerister](https://togithub.com/michaelwoerister) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/584](https://togithub.com/rust-lang/backtrace-rs/pull/584)
-   [@&#8203;dpaoliello](https://togithub.com/dpaoliello) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/587](https://togithub.com/rust-lang/backtrace-rs/pull/587)
-   [@&#8203;GrigorenkoPV](https://togithub.com/GrigorenkoPV) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/585](https://togithub.com/rust-lang/backtrace-rs/pull/585)
-   [@&#8203;fraillt](https://togithub.com/fraillt) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/526](https://togithub.com/rust-lang/backtrace-rs/pull/526)
-   [@&#8203;onur-ozkan](https://togithub.com/onur-ozkan) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/586](https://togithub.com/rust-lang/backtrace-rs/pull/586)

**Full Changelog**: rust-lang/backtrace-rs@0.3.69...0.3.70

### [`v0.3.69`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.69)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.68...0.3.69)

Thank you everyone for contributing to a very nice release!

##### Tracking Binary Size

As backtrace-rs is compiled into every single Rust program, we have begun tracking its binary size in order to find ways to reduce its impact on programs that only minimally use backtraces over time. This change is mostly relevant to this crate's CI, and has been implemented by [@&#8203;Kobzol](https://togithub.com/Kobzol) and [@&#8203;detly](https://togithub.com/detly) over PRs [#&#8203;542](https://togithub.com/rust-lang/backtrace-rs/issues/542), [#&#8203;544](https://togithub.com/rust-lang/backtrace-rs/issues/544), [#&#8203;546](https://togithub.com/rust-lang/backtrace-rs/issues/546), and [#&#8203;550](https://togithub.com/rust-lang/backtrace-rs/issues/550)!

##### Platform-Specific Fixes

As usual, the majority of PRs for this release only affect 1 or 2 platforms. Technically, even the binary-size tracking is only implemented to track binary size on `x86_64-unknown-linux-gnu`.

##### fuchsia

Backtraces for Fuchsia will now uses extended symbolization thanks to [@&#8203;liudangyi](https://togithub.com/liudangyi) in [https://github.com/rust-lang/backtrace-rs/pull/559](https://togithub.com/rust-lang/backtrace-rs/pull/559)

##### unix (with `procfs`)

Many Unix-y platforms support `/proc`, including Linux and FreeBSD, but not OpenBSD. For those which do, backtrace uses `/proc/self/maps` to assist in recovering the trace. We did not parse the output of `/proc/self/maps` in a way that accounted for the fact that it may have spaces in path names, but this was fixed thanks to [@&#8203;MasonRemaley](https://togithub.com/MasonRemaley) in [https://github.com/rust-lang/backtrace-rs/pull/553](https://togithub.com/rust-lang/backtrace-rs/pull/553)

##### windows-msvc

Some changes that should help binary size specifically on Windows MSVC targets, or at least compile times, have already been implemented, thanks to [@&#8203;klensy](https://togithub.com/klensy) in [https://github.com/rust-lang/backtrace-rs/pull/543](https://togithub.com/rust-lang/backtrace-rs/pull/543) omitting compiling-in ELF backtrace capabilities. We don't have full binary size tracking for all major supported operating systems yet, so we believe this is worth 30KiB but that's more of an estimate than hard stats.

##### Dependency Management

-   Update addr2line and object dependencies by [@&#8203;philipc](https://togithub.com/philipc) in [https://github.com/rust-lang/backtrace-rs/pull/557](https://togithub.com/rust-lang/backtrace-rs/pull/557)
-   Exclude ci directory from packaged crate by [@&#8203;mulkieran](https://togithub.com/mulkieran) in [https://github.com/rust-lang/backtrace-rs/pull/555](https://togithub.com/rust-lang/backtrace-rs/pull/555)
-   Enable calling build.rs directly from std/build.rs by [@&#8203;pitaj](https://togithub.com/pitaj) in [https://github.com/rust-lang/backtrace-rs/pull/556](https://togithub.com/rust-lang/backtrace-rs/pull/556)

##### New Contributors

-   [@&#8203;Kobzol](https://togithub.com/Kobzol) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/542](https://togithub.com/rust-lang/backtrace-rs/pull/542)
-   [@&#8203;detly](https://togithub.com/detly) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/550](https://togithub.com/rust-lang/backtrace-rs/pull/550)
-   [@&#8203;liudangyi](https://togithub.com/liudangyi) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/559](https://togithub.com/rust-lang/backtrace-rs/pull/559)
-   [@&#8203;MasonRemaley](https://togithub.com/MasonRemaley) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/553](https://togithub.com/rust-lang/backtrace-rs/pull/553)
-   [@&#8203;mulkieran](https://togithub.com/mulkieran) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/555](https://togithub.com/rust-lang/backtrace-rs/pull/555)
-   [@&#8203;pitaj](https://togithub.com/pitaj) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/556](https://togithub.com/rust-lang/backtrace-rs/pull/556)
-   [@&#8203;klensy](https://togithub.com/klensy) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/543](https://togithub.com/rust-lang/backtrace-rs/pull/543)

**Full Changelog**: rust-lang/backtrace-rs@0.3.68...0.3.69

### [`v0.3.68`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.68)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.67...0.3.68)

A bunch of behind-the-scenes work on upgrading CI has finally got things to a place where we can do confident releases again, so hopefully the next backtrace version will not take 6 months! Thanks to everyone who contributed to that! Most of the user-facing changes are about dependency updates and consequent improved platform compatibility, including with split DWARF. A few new functions on BacktraceFmt should also make it easier to inject additional text into backtrace's output.

-   Adapt to new Fuchsia target name by [@&#8203;flba-eb](https://togithub.com/flba-eb) in [https://github.com/rust-lang/backtrace-rs/pull/509](https://togithub.com/rust-lang/backtrace-rs/pull/509)
-   armv7 PSVita OS support by [@&#8203;nikarh](https://togithub.com/nikarh) in [https://github.com/rust-lang/backtrace-rs/pull/523](https://togithub.com/rust-lang/backtrace-rs/pull/523)
-   Upgrade addr2line and properly handle split DWARF on Linux by [@&#8203;khuey](https://togithub.com/khuey) in [https://github.com/rust-lang/backtrace-rs/pull/513](https://togithub.com/rust-lang/backtrace-rs/pull/513)
-   deps: update miniz_oxide to 0.7 by [@&#8203;poliorcetics](https://togithub.com/poliorcetics) in [https://github.com/rust-lang/backtrace-rs/pull/521](https://togithub.com/rust-lang/backtrace-rs/pull/521)
-   Add print in BacktraceFmt by [@&#8203;chenyukang](https://togithub.com/chenyukang) in [https://github.com/rust-lang/backtrace-rs/pull/527](https://togithub.com/rust-lang/backtrace-rs/pull/527)
-   Bump object to 0.31 by [@&#8203;lnicola](https://togithub.com/lnicola) in [https://github.com/rust-lang/backtrace-rs/pull/522](https://togithub.com/rust-lang/backtrace-rs/pull/522)
-   Add an exception for QNX Neutrino 7.0 as a 'no-op' platform by [@&#8203;samkearney](https://togithub.com/samkearney) in [https://github.com/rust-lang/backtrace-rs/pull/529](https://togithub.com/rust-lang/backtrace-rs/pull/529)
-   Use mmap64 on Linux. by [@&#8203;mikebenfield](https://togithub.com/mikebenfield) in [https://github.com/rust-lang/backtrace-rs/pull/501](https://togithub.com/rust-lang/backtrace-rs/pull/501)
-   dbghlp: Make mutex name unique to the process by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/518](https://togithub.com/rust-lang/backtrace-rs/pull/518)
-   gimli add netbsd to handle dl_iterate_phdr as well. by [@&#8203;devnexen](https://togithub.com/devnexen) in [https://github.com/rust-lang/backtrace-rs/pull/512](https://togithub.com/rust-lang/backtrace-rs/pull/512)
-   Add other apple targets to libunwind workaround by [@&#8203;thomcc](https://togithub.com/thomcc) in [https://github.com/rust-lang/backtrace-rs/pull/516](https://togithub.com/rust-lang/backtrace-rs/pull/516)
-   Add fmt method for BacktraceFmt by [@&#8203;chenyukang](https://togithub.com/chenyukang) in [https://github.com/rust-lang/backtrace-rs/pull/532](https://togithub.com/rust-lang/backtrace-rs/pull/532)

##### New Contributors

-   [@&#8203;bwmf2](https://togithub.com/bwmf2) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/515](https://togithub.com/rust-lang/backtrace-rs/pull/515)
-   [@&#8203;flba-eb](https://togithub.com/flba-eb) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/509](https://togithub.com/rust-lang/backtrace-rs/pull/509)
-   [@&#8203;nikarh](https://togithub.com/nikarh) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/523](https://togithub.com/rust-lang/backtrace-rs/pull/523)
-   [@&#8203;poliorcetics](https://togithub.com/poliorcetics) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/521](https://togithub.com/rust-lang/backtrace-rs/pull/521)
-   [@&#8203;GuillaumeGomez](https://togithub.com/GuillaumeGomez) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/524](https://togithub.com/rust-lang/backtrace-rs/pull/524)
-   [@&#8203;chenyukang](https://togithub.com/chenyukang) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/527](https://togithub.com/rust-lang/backtrace-rs/pull/527)
-   [@&#8203;lnicola](https://togithub.com/lnicola) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/522](https://togithub.com/rust-lang/backtrace-rs/pull/522)
-   [@&#8203;samkearney](https://togithub.com/samkearney) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/529](https://togithub.com/rust-lang/backtrace-rs/pull/529)
-   [@&#8203;mikebenfield](https://togithub.com/mikebenfield) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/501](https://togithub.com/rust-lang/backtrace-rs/pull/501)
-   [@&#8203;devnexen](https://togithub.com/devnexen) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/512](https://togithub.com/rust-lang/backtrace-rs/pull/512)
-   [@&#8203;thomcc](https://togithub.com/thomcc) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/516](https://togithub.com/rust-lang/backtrace-rs/pull/516)
-   [@&#8203;workingjubilee](https://togithub.com/workingjubilee) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/533](https://togithub.com/rust-lang/backtrace-rs/pull/533)
-   [@&#8203;chriswailes](https://togithub.com/chriswailes) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/534](https://togithub.com/rust-lang/backtrace-rs/pull/534)

**Full Changelog**: rust-lang/backtrace-rs@0.3.67...0.3.68

</details>

---

### Configuration

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♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

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---

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [backtrace](https://togithub.com/rust-lang/backtrace-rs) | dependencies | patch | `0.3` -> `0.3.71` |

---

### Release Notes

<details>
<summary>rust-lang/backtrace-rs (backtrace)</summary>

### [`v0.3.71`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.71)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.70...0.3.71)

This is mostly CI changes, with a very mild bump to our effective cc crate version recorded, and a small modification to a previous changeset to allow backtrace to run at its current checked-in MSRV on Windows. Sorry about that! We will be getting 0.3.70 yanked shortly.

##### What's Changed

-   Make sgx functions exist with cfg(miri) by [@&#8203;saethlin](https://togithub.com/saethlin) in [https://github.com/rust-lang/backtrace-rs/pull/591](https://togithub.com/rust-lang/backtrace-rs/pull/591)
-   Update version of cc crate by [@&#8203;jfgoog](https://togithub.com/jfgoog) in [https://github.com/rust-lang/backtrace-rs/pull/592](https://togithub.com/rust-lang/backtrace-rs/pull/592)
-   Pull back MSRV on Windows by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/598](https://togithub.com/rust-lang/backtrace-rs/pull/598)
-   Force frame pointers on all i686 tests by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/601](https://togithub.com/rust-lang/backtrace-rs/pull/601)
-   Use rustc from stage0 instead of stage0-sysroot by [@&#8203;Nilstrieb](https://togithub.com/Nilstrieb) in [https://github.com/rust-lang/backtrace-rs/pull/602](https://togithub.com/rust-lang/backtrace-rs/pull/602)
-   Cut backtrace 0.3.71 by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/599](https://togithub.com/rust-lang/backtrace-rs/pull/599)

##### New Contributors

-   [@&#8203;jfgoog](https://togithub.com/jfgoog) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/592](https://togithub.com/rust-lang/backtrace-rs/pull/592)
-   [@&#8203;Nilstrieb](https://togithub.com/Nilstrieb) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/602](https://togithub.com/rust-lang/backtrace-rs/pull/602)

**Full Changelog**: rust-lang/backtrace-rs@0.3.70...0.3.71

### [`v0.3.70`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.70)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.69...0.3.70)

##### New API

-   A `BacktraceFrame` can now have `resolve(&mut self)` called on it thanks to [@&#8203;fraillt](https://togithub.com/fraillt) in [https://github.com/rust-lang/backtrace-rs/pull/526](https://togithub.com/rust-lang/backtrace-rs/pull/526)

##### Platform Support

We added support for new platforms in this release!

-   Thanks to [@&#8203;bzEq](https://togithub.com/bzEq) in [https://github.com/rust-lang/backtrace-rs/pull/508](https://togithub.com/rust-lang/backtrace-rs/pull/508) we now have AIX support!
-   Thanks to [@&#8203;sthibaul](https://togithub.com/sthibaul) in [https://github.com/rust-lang/backtrace-rs/pull/567](https://togithub.com/rust-lang/backtrace-rs/pull/567) we now have GNU/Hurd support!
-   Thanks to [@&#8203;dpaoliello](https://togithub.com/dpaoliello) in [https://github.com/rust-lang/backtrace-rs/pull/587](https://togithub.com/rust-lang/backtrace-rs/pull/587) we now support "emulation-compatible" AArch64 Windows (aka arm64ec)

##### Windows

-   Rewrite msvc backtrace support to be much faster on 64-bit platforms by [@&#8203;wesleywiser](https://togithub.com/wesleywiser) in [https://github.com/rust-lang/backtrace-rs/pull/569](https://togithub.com/rust-lang/backtrace-rs/pull/569)
-   Fix i686-pc-windows-gnu missing dbghelp module by [@&#8203;wesleywiser](https://togithub.com/wesleywiser) in [https://github.com/rust-lang/backtrace-rs/pull/571](https://togithub.com/rust-lang/backtrace-rs/pull/571)
-   Fix build errors on `thumbv7a-*-windows-msvc` targets by [@&#8203;kleisauke](https://togithub.com/kleisauke) in [https://github.com/rust-lang/backtrace-rs/pull/573](https://togithub.com/rust-lang/backtrace-rs/pull/573)
-   Fix panic in backtrace symbolication on win7 by [@&#8203;roblabla](https://togithub.com/roblabla) in [https://github.com/rust-lang/backtrace-rs/pull/578](https://togithub.com/rust-lang/backtrace-rs/pull/578)
-   remove few unused windows ffi fn by [@&#8203;klensy](https://togithub.com/klensy) in [https://github.com/rust-lang/backtrace-rs/pull/576](https://togithub.com/rust-lang/backtrace-rs/pull/576)
-   Make dbghelp look for PDBs next to their exe/dll. by [@&#8203;michaelwoerister](https://togithub.com/michaelwoerister) in [https://github.com/rust-lang/backtrace-rs/pull/584](https://togithub.com/rust-lang/backtrace-rs/pull/584)
-   Revert 32-bit dbghelp to a version WINE (presumably) likes by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/588](https://togithub.com/rust-lang/backtrace-rs/pull/588)
-   Update for Win10+ by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/589](https://togithub.com/rust-lang/backtrace-rs/pull/589)

##### SGX

Thanks to

-   Adjust frame IP in SGX relative to image base by [@&#8203;mzohreva](https://togithub.com/mzohreva) in [https://github.com/rust-lang/backtrace-rs/pull/566](https://togithub.com/rust-lang/backtrace-rs/pull/566)

##### Internals

We did a bunch more work on our CI and internal cleanups

-   Modularise CI workflow and validate outputs for binary size checks. by [@&#8203;detly](https://togithub.com/detly) in [https://github.com/rust-lang/backtrace-rs/pull/549](https://togithub.com/rust-lang/backtrace-rs/pull/549)
-   Commit Cargo.lock by [@&#8203;bjorn3](https://togithub.com/bjorn3) in [https://github.com/rust-lang/backtrace-rs/pull/562](https://togithub.com/rust-lang/backtrace-rs/pull/562)
-   Enable calling build.rs externally v2 by [@&#8203;pitaj](https://togithub.com/pitaj) in [https://github.com/rust-lang/backtrace-rs/pull/568](https://togithub.com/rust-lang/backtrace-rs/pull/568)
-   Upgrade to 2021 ed and inline panics by [@&#8203;nyurik](https://togithub.com/nyurik) in [https://github.com/rust-lang/backtrace-rs/pull/538](https://togithub.com/rust-lang/backtrace-rs/pull/538)
-   Fix deny(unused) of an unused import with SGX + Miri by [@&#8203;saethlin](https://togithub.com/saethlin) in [https://github.com/rust-lang/backtrace-rs/pull/581](https://togithub.com/rust-lang/backtrace-rs/pull/581)
-   Fix unused_imports warning on latest nightly by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/575](https://togithub.com/rust-lang/backtrace-rs/pull/575)
-   Fix CI by [@&#8203;saethlin](https://togithub.com/saethlin) in [https://github.com/rust-lang/backtrace-rs/pull/582](https://togithub.com/rust-lang/backtrace-rs/pull/582)
-   Use `addr_of!` by [@&#8203;GrigorenkoPV](https://togithub.com/GrigorenkoPV) in [https://github.com/rust-lang/backtrace-rs/pull/585](https://togithub.com/rust-lang/backtrace-rs/pull/585)
-   Write down MSRV policy by [@&#8203;workingjubilee](https://togithub.com/workingjubilee) in [https://github.com/rust-lang/backtrace-rs/pull/561](https://togithub.com/rust-lang/backtrace-rs/pull/561)
-   Apply clippy::uninlined_format_args fixes by [@&#8203;nyurik](https://togithub.com/nyurik) in [https://github.com/rust-lang/backtrace-rs/pull/486](https://togithub.com/rust-lang/backtrace-rs/pull/486)
-   ignore clippy lints in `symbolize/gimli/stash.rs` by [@&#8203;onur-ozkan](https://togithub.com/onur-ozkan) in [https://github.com/rust-lang/backtrace-rs/pull/586](https://togithub.com/rust-lang/backtrace-rs/pull/586)

##### New Contributors

-   [@&#8203;nyurik](https://togithub.com/nyurik) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/538](https://togithub.com/rust-lang/backtrace-rs/pull/538)
-   [@&#8203;bzEq](https://togithub.com/bzEq) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/508](https://togithub.com/rust-lang/backtrace-rs/pull/508)
-   [@&#8203;bjorn3](https://togithub.com/bjorn3) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/562](https://togithub.com/rust-lang/backtrace-rs/pull/562)
-   [@&#8203;sthibaul](https://togithub.com/sthibaul) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/567](https://togithub.com/rust-lang/backtrace-rs/pull/567)
-   [@&#8203;mzohreva](https://togithub.com/mzohreva) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/566](https://togithub.com/rust-lang/backtrace-rs/pull/566)
-   [@&#8203;wesleywiser](https://togithub.com/wesleywiser) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/569](https://togithub.com/rust-lang/backtrace-rs/pull/569)
-   [@&#8203;kleisauke](https://togithub.com/kleisauke) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/573](https://togithub.com/rust-lang/backtrace-rs/pull/573)
-   [@&#8203;roblabla](https://togithub.com/roblabla) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/578](https://togithub.com/rust-lang/backtrace-rs/pull/578)
-   [@&#8203;michaelwoerister](https://togithub.com/michaelwoerister) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/584](https://togithub.com/rust-lang/backtrace-rs/pull/584)
-   [@&#8203;dpaoliello](https://togithub.com/dpaoliello) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/587](https://togithub.com/rust-lang/backtrace-rs/pull/587)
-   [@&#8203;GrigorenkoPV](https://togithub.com/GrigorenkoPV) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/585](https://togithub.com/rust-lang/backtrace-rs/pull/585)
-   [@&#8203;fraillt](https://togithub.com/fraillt) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/526](https://togithub.com/rust-lang/backtrace-rs/pull/526)
-   [@&#8203;onur-ozkan](https://togithub.com/onur-ozkan) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/586](https://togithub.com/rust-lang/backtrace-rs/pull/586)

**Full Changelog**: rust-lang/backtrace-rs@0.3.69...0.3.70

### [`v0.3.69`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.69)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.68...0.3.69)

Thank you everyone for contributing to a very nice release!

##### Tracking Binary Size

As backtrace-rs is compiled into every single Rust program, we have begun tracking its binary size in order to find ways to reduce its impact on programs that only minimally use backtraces over time. This change is mostly relevant to this crate's CI, and has been implemented by [@&#8203;Kobzol](https://togithub.com/Kobzol) and [@&#8203;detly](https://togithub.com/detly) over PRs [#&#8203;542](https://togithub.com/rust-lang/backtrace-rs/issues/542), [#&#8203;544](https://togithub.com/rust-lang/backtrace-rs/issues/544), [#&#8203;546](https://togithub.com/rust-lang/backtrace-rs/issues/546), and [#&#8203;550](https://togithub.com/rust-lang/backtrace-rs/issues/550)!

##### Platform-Specific Fixes

As usual, the majority of PRs for this release only affect 1 or 2 platforms. Technically, even the binary-size tracking is only implemented to track binary size on `x86_64-unknown-linux-gnu`.

##### fuchsia

Backtraces for Fuchsia will now uses extended symbolization thanks to [@&#8203;liudangyi](https://togithub.com/liudangyi) in [https://github.com/rust-lang/backtrace-rs/pull/559](https://togithub.com/rust-lang/backtrace-rs/pull/559)

##### unix (with `procfs`)

Many Unix-y platforms support `/proc`, including Linux and FreeBSD, but not OpenBSD. For those which do, backtrace uses `/proc/self/maps` to assist in recovering the trace. We did not parse the output of `/proc/self/maps` in a way that accounted for the fact that it may have spaces in path names, but this was fixed thanks to [@&#8203;MasonRemaley](https://togithub.com/MasonRemaley) in [https://github.com/rust-lang/backtrace-rs/pull/553](https://togithub.com/rust-lang/backtrace-rs/pull/553)

##### windows-msvc

Some changes that should help binary size specifically on Windows MSVC targets, or at least compile times, have already been implemented, thanks to [@&#8203;klensy](https://togithub.com/klensy) in [https://github.com/rust-lang/backtrace-rs/pull/543](https://togithub.com/rust-lang/backtrace-rs/pull/543) omitting compiling-in ELF backtrace capabilities. We don't have full binary size tracking for all major supported operating systems yet, so we believe this is worth 30KiB but that's more of an estimate than hard stats.

##### Dependency Management

-   Update addr2line and object dependencies by [@&#8203;philipc](https://togithub.com/philipc) in [https://github.com/rust-lang/backtrace-rs/pull/557](https://togithub.com/rust-lang/backtrace-rs/pull/557)
-   Exclude ci directory from packaged crate by [@&#8203;mulkieran](https://togithub.com/mulkieran) in [https://github.com/rust-lang/backtrace-rs/pull/555](https://togithub.com/rust-lang/backtrace-rs/pull/555)
-   Enable calling build.rs directly from std/build.rs by [@&#8203;pitaj](https://togithub.com/pitaj) in [https://github.com/rust-lang/backtrace-rs/pull/556](https://togithub.com/rust-lang/backtrace-rs/pull/556)

##### New Contributors

-   [@&#8203;Kobzol](https://togithub.com/Kobzol) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/542](https://togithub.com/rust-lang/backtrace-rs/pull/542)
-   [@&#8203;detly](https://togithub.com/detly) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/550](https://togithub.com/rust-lang/backtrace-rs/pull/550)
-   [@&#8203;liudangyi](https://togithub.com/liudangyi) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/559](https://togithub.com/rust-lang/backtrace-rs/pull/559)
-   [@&#8203;MasonRemaley](https://togithub.com/MasonRemaley) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/553](https://togithub.com/rust-lang/backtrace-rs/pull/553)
-   [@&#8203;mulkieran](https://togithub.com/mulkieran) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/555](https://togithub.com/rust-lang/backtrace-rs/pull/555)
-   [@&#8203;pitaj](https://togithub.com/pitaj) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/556](https://togithub.com/rust-lang/backtrace-rs/pull/556)
-   [@&#8203;klensy](https://togithub.com/klensy) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/543](https://togithub.com/rust-lang/backtrace-rs/pull/543)

**Full Changelog**: rust-lang/backtrace-rs@0.3.68...0.3.69

### [`v0.3.68`](https://togithub.com/rust-lang/backtrace-rs/releases/tag/0.3.68)

[Compare Source](https://togithub.com/rust-lang/backtrace-rs/compare/0.3.67...0.3.68)

A bunch of behind-the-scenes work on upgrading CI has finally got things to a place where we can do confident releases again, so hopefully the next backtrace version will not take 6 months! Thanks to everyone who contributed to that! Most of the user-facing changes are about dependency updates and consequent improved platform compatibility, including with split DWARF. A few new functions on BacktraceFmt should also make it easier to inject additional text into backtrace's output.

-   Adapt to new Fuchsia target name by [@&#8203;flba-eb](https://togithub.com/flba-eb) in [https://github.com/rust-lang/backtrace-rs/pull/509](https://togithub.com/rust-lang/backtrace-rs/pull/509)
-   armv7 PSVita OS support by [@&#8203;nikarh](https://togithub.com/nikarh) in [https://github.com/rust-lang/backtrace-rs/pull/523](https://togithub.com/rust-lang/backtrace-rs/pull/523)
-   Upgrade addr2line and properly handle split DWARF on Linux by [@&#8203;khuey](https://togithub.com/khuey) in [https://github.com/rust-lang/backtrace-rs/pull/513](https://togithub.com/rust-lang/backtrace-rs/pull/513)
-   deps: update miniz_oxide to 0.7 by [@&#8203;poliorcetics](https://togithub.com/poliorcetics) in [https://github.com/rust-lang/backtrace-rs/pull/521](https://togithub.com/rust-lang/backtrace-rs/pull/521)
-   Add print in BacktraceFmt by [@&#8203;chenyukang](https://togithub.com/chenyukang) in [https://github.com/rust-lang/backtrace-rs/pull/527](https://togithub.com/rust-lang/backtrace-rs/pull/527)
-   Bump object to 0.31 by [@&#8203;lnicola](https://togithub.com/lnicola) in [https://github.com/rust-lang/backtrace-rs/pull/522](https://togithub.com/rust-lang/backtrace-rs/pull/522)
-   Add an exception for QNX Neutrino 7.0 as a 'no-op' platform by [@&#8203;samkearney](https://togithub.com/samkearney) in [https://github.com/rust-lang/backtrace-rs/pull/529](https://togithub.com/rust-lang/backtrace-rs/pull/529)
-   Use mmap64 on Linux. by [@&#8203;mikebenfield](https://togithub.com/mikebenfield) in [https://github.com/rust-lang/backtrace-rs/pull/501](https://togithub.com/rust-lang/backtrace-rs/pull/501)
-   dbghlp: Make mutex name unique to the process by [@&#8203;ChrisDenton](https://togithub.com/ChrisDenton) in [https://github.com/rust-lang/backtrace-rs/pull/518](https://togithub.com/rust-lang/backtrace-rs/pull/518)
-   gimli add netbsd to handle dl_iterate_phdr as well. by [@&#8203;devnexen](https://togithub.com/devnexen) in [https://github.com/rust-lang/backtrace-rs/pull/512](https://togithub.com/rust-lang/backtrace-rs/pull/512)
-   Add other apple targets to libunwind workaround by [@&#8203;thomcc](https://togithub.com/thomcc) in [https://github.com/rust-lang/backtrace-rs/pull/516](https://togithub.com/rust-lang/backtrace-rs/pull/516)
-   Add fmt method for BacktraceFmt by [@&#8203;chenyukang](https://togithub.com/chenyukang) in [https://github.com/rust-lang/backtrace-rs/pull/532](https://togithub.com/rust-lang/backtrace-rs/pull/532)

##### New Contributors

-   [@&#8203;bwmf2](https://togithub.com/bwmf2) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/515](https://togithub.com/rust-lang/backtrace-rs/pull/515)
-   [@&#8203;flba-eb](https://togithub.com/flba-eb) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/509](https://togithub.com/rust-lang/backtrace-rs/pull/509)
-   [@&#8203;nikarh](https://togithub.com/nikarh) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/523](https://togithub.com/rust-lang/backtrace-rs/pull/523)
-   [@&#8203;poliorcetics](https://togithub.com/poliorcetics) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/521](https://togithub.com/rust-lang/backtrace-rs/pull/521)
-   [@&#8203;GuillaumeGomez](https://togithub.com/GuillaumeGomez) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/524](https://togithub.com/rust-lang/backtrace-rs/pull/524)
-   [@&#8203;chenyukang](https://togithub.com/chenyukang) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/527](https://togithub.com/rust-lang/backtrace-rs/pull/527)
-   [@&#8203;lnicola](https://togithub.com/lnicola) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/522](https://togithub.com/rust-lang/backtrace-rs/pull/522)
-   [@&#8203;samkearney](https://togithub.com/samkearney) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/529](https://togithub.com/rust-lang/backtrace-rs/pull/529)
-   [@&#8203;mikebenfield](https://togithub.com/mikebenfield) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/501](https://togithub.com/rust-lang/backtrace-rs/pull/501)
-   [@&#8203;devnexen](https://togithub.com/devnexen) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/512](https://togithub.com/rust-lang/backtrace-rs/pull/512)
-   [@&#8203;thomcc](https://togithub.com/thomcc) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/516](https://togithub.com/rust-lang/backtrace-rs/pull/516)
-   [@&#8203;workingjubilee](https://togithub.com/workingjubilee) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/533](https://togithub.com/rust-lang/backtrace-rs/pull/533)
-   [@&#8203;chriswailes](https://togithub.com/chriswailes) made their first contribution in [https://github.com/rust-lang/backtrace-rs/pull/534](https://togithub.com/rust-lang/backtrace-rs/pull/534)

**Full Changelog**: rust-lang/backtrace-rs@0.3.67...0.3.68

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5 participants