Assert that locals have storage when used #78147

tmiasko · 2020-10-20T15:35:38Z

The validator in visit_local asserts that local has a stroage when used,
but visit_local is never called so validation is ineffective.

Use super_statement and super_terminator to ensure that locals are visited.

rust-highfive · 2020-10-20T15:35:41Z

r? @lcnr

(rust_highfive has picked a reviewer for you, use r? to override)

lcnr · 2020-10-20T15:38:39Z

LGTM

r? @jonas-schievink for a final review, am not too familiar with this

jonas-schievink · 2020-10-20T15:46:08Z

Hmm, I was sure it caught a bug when I implemented this, weird

tmiasko · 2020-10-20T15:49:25Z

I wondered about that too; it seems to me that was use in debuginfo, until that part was fixed.

This will need a new perf run. It also just found a bug ...

…cation, r=wesleywiser Disable MatchBranchSimplification This optimization can result in unsoundness, because it introduces additional uses of a place holding the discriminant value without ensuring that it is valid to do so. Found by validation from rust-lang#77369 / rust-lang#78147.

jonas-schievink · 2020-10-20T23:03:24Z

@bors try @rust-timer queue

rust-timer · 2020-10-20T23:03:26Z

Awaiting bors try build completion

bors · 2020-10-20T23:03:59Z

⌛ Trying commit 87394e1b0a60b121d2ffefdc020d423517b181a0 with merge 2c2a5c65b82ec277ab9c7904b56e1a506e1f25aa...

rust-log-analyzer · 2020-10-20T23:41:28Z

The job dist-x86_64-linux of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

   Compiling tokio-codec v0.1.2
   Compiling jsonrpc-core v14.2.0
   Compiling lsp-types v0.60.0
   Compiling addr2line v0.13.0
error: internal compiler error: broken MIR in Item(WithOptConstParam { did: DefId(0:317 ~ mio[c9d7]::poll::{impl#21}::update), const_param_did: None }) (end of phase Optimization) at bb2[20]:
use of local _12, which has no storage here
    --> /cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/mio-0.6.22/src/poll.rs:1888:21
     |
1888 |         let other = *other;
     |
     |
     = note: delayed at compiler/rustc_mir/src/transform/validate.rs:167:36

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:961:13

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.
note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.49.0-nightly (2c2a5c65b 2020-10-20) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z macro-backtrace -Z binary-dep-depinfo -C opt-level=3 -C embed-bitcode=no -C debuginfo=0 -C linker=clang -C link-args=-Wl,-rpath,$ORIGIN/../lib --crate-type lib

note: some of the compiler flags provided by cargo are hidden

---
   Compiling chrono v0.4.15
   Compiling mio-extras v2.0.6
   Compiling notify v5.0.0-pre.3
   Compiling vfs-notify v0.0.0 (/checkout/src/tools/rust-analyzer/crates/vfs-notify)
error: internal compiler error: broken MIR in Item(WithOptConstParam { did: DefId(0:317 ~ mio[a47d]::poll::{impl#21}::update), const_param_did: None }) (end of phase Optimization) at bb2[20]:
use of local _12, which has no storage here
    --> /cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/mio-0.6.22/src/poll.rs:1888:21
     |
1888 |         let other = *other;
     |
     |
     = note: delayed at compiler/rustc_mir/src/transform/validate.rs:167:36

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:961:13

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.
note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.49.0-nightly (2c2a5c65b 2020-10-20) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z macro-backtrace -Z binary-dep-depinfo -C opt-level=3 -C embed-bitcode=no -C debuginfo=0 -C linker=clang -C link-args=-Wl,-rpath,$ORIGIN/../lib --crate-type lib

note: some of the compiler flags provided by cargo are hidden

---
warning: build failed, waiting for other jobs to finish...
error: build failed
command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "16" "--release" "--locked" "--color" "always" "--manifest-path" "/checkout/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml" "--message-format" "json-render-diagnostics"
expected success, got: exit code: 101
thread 'main' panicked at 'rust-analyzer always builds', src/bootstrap/dist.rs:1399:14
failed to run: /checkout/obj/build/bootstrap/debug/bootstrap dist --host x86_64-unknown-linux-gnu --target x86_64-unknown-linux-gnu --include-default-paths src/tools/build-manifest
Build completed unsuccessfully in 0:33:56
== clock drift check ==
  local time: Tue Oct 20 23:41:17 UTC 2020
  local time: Tue Oct 20 23:41:17 UTC 2020
  network time: Tue, 20 Oct 2020 01:04:22 GMT
== end clock drift check ==
##[error]Process completed with exit code 1.
Terminate orphan process: pid (4762) (python)

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @rust-lang/infra. (Feature Requests)

bors · 2020-10-20T23:41:41Z

💔 Test failed - checks-actions

tmiasko · 2020-10-21T16:45:42Z

I cherry picked a fix. We can try running perf again. Thanks!

jonas-schievink · 2020-10-21T17:03:54Z

@bors try @rust-timer queue

rust-timer · 2020-10-21T17:03:56Z

Awaiting bors try build completion

bors · 2020-10-21T17:04:29Z

⌛ Trying commit e3630a9a6bd3e03efb6c5f5a313adc48c1c7fb4b with merge 5f06fab28613e7f3ac319440e305f7b5909e1b0e...

bors · 2020-10-22T20:27:29Z

💥 Test timed out

bors · 2020-10-25T14:42:36Z

☔ The latest upstream changes (presumably #78350) made this pull request unmergeable. Please resolve the merge conflicts.

Note that reviewers usually do not review pull requests until merge conflicts are resolved! Once you resolve the conflicts, you should change the labels applied by bors to indicate that your PR is ready for review. Post this as a comment to change the labels:

@rustbot modify labels: +S-waiting-on-review -S-waiting-on-author

bors · 2020-10-31T19:55:45Z

☔ The latest upstream changes (presumably #78594) made this pull request unmergeable. Please resolve the merge conflicts.

Note that reviewers usually do not review pull requests until merge conflicts are resolved! Once you resolve the conflicts, you should change the labels applied by bors to indicate that your PR is ready for review. Post this as a comment to change the labels:

@rustbot modify labels: +S-waiting-on-review -S-waiting-on-author

The validator in visit_local asserts that local has a stroage when used, but visit_local is never called so validation is ineffective. Use super_statement and super_terminator to ensure that locals are visited.

tmiasko · 2020-10-31T21:05:03Z

Rebased.

jonas-schievink · 2020-10-31T21:19:16Z

@bors try @rust-timer queue

rust-timer · 2020-10-31T21:19:18Z

Awaiting bors try build completion

bors · 2020-10-31T21:19:28Z

⌛ Trying commit 3b7157d with merge 9885b20e857447b481b8b2e326294e9bb8d31145...

bors · 2020-10-31T22:03:14Z

☀️ Try build successful - checks-actions
Build commit: 9885b20e857447b481b8b2e326294e9bb8d31145 (9885b20e857447b481b8b2e326294e9bb8d31145)

rust-timer · 2020-10-31T22:03:15Z

Queued 9885b20e857447b481b8b2e326294e9bb8d31145 with parent 4f7612a, future comparison URL.

rust-timer · 2020-10-31T23:38:45Z

Finished benchmarking try commit (9885b20e857447b481b8b2e326294e9bb8d31145): comparison url.

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. Please note that if the perf results are neutral, you should likely undo the rollup=never given below by specifying rollup- to bors.

Importantly, though, if the results of this run are non-neutral do not roll this PR up -- it will mask other regressions or improvements in the roll up.

@bors rollup=never
@rustbot modify labels: +S-waiting-on-review -S-waiting-on-perf

jonas-schievink · 2020-10-31T23:45:49Z

@bors r+ rollup-

bors · 2020-10-31T23:45:51Z

📌 Commit 3b7157d has been approved by jonas-schievink

jonas-schievink · 2020-10-31T23:47:39Z

@bors rollup=never

There does seem to be a slight regression in tuple-stress, so let's not roll it up.

bors · 2020-11-01T01:27:19Z

⌛ Testing commit 3b7157d with merge a6403b0...

bors · 2020-11-01T03:47:46Z

☀️ Test successful - checks-actions
Approved by: jonas-schievink
Pushing a6403b0 to master...

rust-highfive assigned lcnr Oct 20, 2020

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Oct 20, 2020

rust-highfive assigned jonas-schievink and unassigned lcnr Oct 20, 2020

tmiasko mentioned this pull request Oct 20, 2020

Disable MatchBranchSimplification #78151

Merged

tmiasko force-pushed the validate-storage branch 4 times, most recently from c474f0b to 87394e1 Compare October 20, 2020 20:19

rust-lang deleted a comment from ddd0kl Oct 20, 2020

bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 20, 2020

tmiasko mentioned this pull request Oct 21, 2020

InstCombine introduces an incorrect use of a local after its storage has ended #78192

Closed

tmiasko force-pushed the validate-storage branch from 87394e1 to e3630a9 Compare October 21, 2020 16:44

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Oct 22, 2020

tmiasko force-pushed the validate-storage branch from b7baa10 to f1b64a6 Compare October 25, 2020 16:09

Assert that locals have storage when used

3b7157d

The validator in visit_local asserts that local has a stroage when used, but visit_local is never called so validation is ineffective. Use super_statement and super_terminator to ensure that locals are visited.

tmiasko force-pushed the validate-storage branch from f1b64a6 to 3b7157d Compare October 31, 2020 20:37

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 31, 2020

bors added the merged-by-bors This PR was explicitly merged by bors. label Nov 1, 2020

bors merged commit a6403b0 into rust-lang:master Nov 1, 2020

rustbot added this to the 1.49.0 milestone Nov 1, 2020

bors mentioned this pull request Nov 1, 2020

revert #75443, update mir validator #78410

Merged

tmiasko deleted the validate-storage branch November 1, 2020 09:03

tmiasko mentioned this pull request Nov 21, 2020

ICE: broken mir with -Zunsound-mir-opts: simplify arm identity #78628

Closed

matthiaskrgr mentioned this pull request Dec 18, 2023

MIR validation ICE: Use of local which has no storage #118990

Closed

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Assert that locals have storage when used #78147

Assert that locals have storage when used #78147

tmiasko commented Oct 20, 2020

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lcnr commented Oct 20, 2020

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Assert that locals have storage when used #78147

Assert that locals have storage when used #78147

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tmiasko commented Oct 20, 2020

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