Repro Case for rust-lang/rust#95825
- MacBook Pro (16-inch, 2019)
- macOS Monterey version 12.1 (21C52)
- Processor: 2.3 GHz 8-Core Intel Core i9
- Memory: 16 GB 2667 MHz DDR4
rustc --version --verbose:
rustc 1.60.0 (7737e0b5c 2022-04-04)
binary: rustc
commit-hash: 7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c
commit-date: 2022-04-04
host: x86_64-apple-darwin
release: 1.60.0
LLVM version: 14.0.0
I think the key feature in this bug is that there are a lot of dependencies.
When watching top output while running the "with coverage" case below, I noticed a lot of CPU activity in rustc while the bin project was running its integration test. I suspect there's a race condition between running the bin integration test and the lib doc tests that does not occur with code coverage disabled.
$ cargo test
[build progress omitted...]
Running unittests (target/debug/deps/bin-baa2cdc9756c282a)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running tests/integration.rs (target/debug/deps/integration-8fafe3abc3bd36c4)
running 1 test
test bin_errors_out ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 33.58s
Running unittests (target/debug/deps/lib-1e31e0e54b9c0c1d)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Doc-tests lib
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s$ RUSTFLAGS="-C instrument-coverage" cargo test --all-features
[build progress omitted...]
Running unittests (target/debug/deps/bin-8f115d9d2990e87c)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running tests/integration.rs (target/debug/deps/integration-a5cfd02c9977acc5)
running 1 test
test bin_errors_out ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 52.23s
Running unittests (target/debug/deps/lib-4d09b9d33c89fcfa)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Doc-tests lib
error[E0460]: found possibly newer version of crate `cfg_if` which `log` depends on
--> (path redacted)/cov-bug-repro/lib/src/time_it.rs:1:5
|
1 | use log::info;
| ^^^
|
= note: perhaps that crate needs to be recompiled?
= note: the following crate versions were found:
crate `cfg_if`: (path redacted)/cov-bug-repro/target/debug/deps/libcfg_if-7e74d31581507915.rmeta
crate `cfg_if`: (path redacted)/cov-bug-repro/target/debug/deps/libcfg_if-7e74d31581507915.rlib
crate `cfg_if`: (path redacted)/cov-bug-repro/target/debug/deps/libcfg_if-3cd7bda968e519ae.rmeta
crate `cfg_if`: (path redacted)/.rustup/toolchains/1.60.0-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcfg_if-100dc4191a6287d7.rlib
crate `log`: (path redacted)/cov-bug-repro/target/debug/deps/liblog-89e0b97aa80e736c.rlib
error[E0463]: can't find crate for `serde_derive` which `serde` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:1:5
|
1 | use serde::de::{Deserialize, Deserializer};
| ^^^^^ can't find crate
error[E0463]: can't find crate for `serde_derive` which `serde` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:2:5
|
2 | use serde::ser::{Serialize, Serializer};
| ^^^^^ can't find crate
error[E0463]: can't find crate for `serde_derive` which `serde_bytes` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:3:5
|
3 | use serde_bytes::ByteBuf;
| ^^^^^^^^^^^ can't find crate
error[E0463]: can't find crate for `serde_derive` which `serde_cbor` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:4:5
|
4 | use serde_cbor::tags::Tagged;
| ^^^^^^^^^^ can't find crate
error: cannot find macro `info` in this scope
--> (path redacted)/cov-bug-repro/lib/src/time_it.rs:19:9
|
19 | info!("timing for {}: {:.2?}", self.label, self.start.elapsed());
| ^^^^
error[E0463]: can't find crate for `serde_derive` which `serde` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:21:28
|
21 | Some(_) => Err(serde::de::Error::custom("unexpected tag")),
| ^^^^^ can't find crate
error[E0463]: can't find crate for `serde_derive` which `serde` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:47:28
|
47 | Some(_) => Err(serde::de::Error::custom("unexpected tag")),
| ^^^^^ can't find crate
error[E0463]: can't find crate for `serde_derive` which `serde` depends on
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:72:28
|
72 | Some(_) => Err(serde::de::Error::custom("unexpected tag")),
| ^^^^^ can't find crate
error[E0405]: cannot find trait `Serialize` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:10:6
|
10 | impl Serialize for DateT {
| ^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Serializer` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:11:21
|
11 | fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
| ^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Deserialize` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:16:11
|
16 | impl<'de> Deserialize<'de> for DateT {
| ^^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Deserializer` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:17:23
|
17 | fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
| ^^^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Serialize` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:35:6
|
35 | impl Serialize for UriT {
| ^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Serializer` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:36:21
|
36 | fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
| ^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Deserialize` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:41:11
|
41 | impl<'de> Deserialize<'de> for UriT {
| ^^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Deserializer` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:42:23
|
42 | fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
| ^^^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Serialize` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:61:6
|
61 | impl Serialize for BytesT {
| ^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Serializer` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:62:21
|
62 | fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
| ^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Deserialize` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:67:11
|
67 | impl<'de> Deserialize<'de> for BytesT {
| ^^^^^^^^^^^ not found in this scope
error[E0405]: cannot find trait `Deserializer` in this scope
--> (path redacted)/cov-bug-repro/lib/src/cbor_types.rs:68:23
|
68 | fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
| ^^^^^^^^^^^^ not found in this scope
error: aborting due to 21 previous errors
Some errors have detailed explanations: E0405, E0463.
For more information about an error, try `rustc --explain E0405`.
error: test failed, to rerun pass '--doc'