fix default-backtrace-ice test
when running `tests/ui/panics/default-backtrace-ice.rs locally it gave this error:
```
failures:
---- [ui] tests/ui/panics/default-backtrace-ice.rs stdout ----
Saved the actual stderr to "/home/jyn/src/rust3/build/x86_64-unknown-linux-gnu/test/ui/panics/default-backtrace-ice/default-backtrace-ice.stderr"
diff of stderr:
7
8 aborting due to `-Z treat-err-as-bug=1`
9 stack backtrace:
- (end_short_backtrace)
- (begin_short_backtrace)
- (end_short_backtrace)
- (begin_short_backtrace)
+ [... omitted 22 frames ...]
+
```
(note that you must *not* use --bless; we previously did not have an error annotation to verify it was a full backtrace instead of a short backtrace.)
this is a regression from setting RUST_BACKTRACE=1 by default in https://github.com/rust-lang/rust/pull/134743. we need to turn off the new behavior when running UI tests so that they reflect our dist compiler. normally that's done by checking `sess.unstable_opts.ui_testing`, but this happens extremely early in the compiler before we've expanded arg files. do an extremely simple hack that doesn't work in all cases - we don't need it to work in all cases, only when running UI tests.
cc https://github.com/rust-lang/rust/pull/129658#issuecomment-2561988081
r? `@jieyouxu`
when running `tests/ui/panics/default-backtrace-ice.rs locally it gave this error:
```
failures:
---- [ui] tests/ui/panics/default-backtrace-ice.rs stdout ----
Saved the actual stderr to "/home/jyn/src/rust3/build/x86_64-unknown-linux-gnu/test/ui/panics/default-backtrace-ice/default-backtrace-ice.stderr"
diff of stderr:
7
8 aborting due to `-Z treat-err-as-bug=1`
9 stack backtrace:
- (end_short_backtrace)
- (begin_short_backtrace)
- (end_short_backtrace)
- (begin_short_backtrace)
+ [... omitted 22 frames ...]
+
```
this is a regression from setting RUST_BACKTRACE=1 by default. we need to turn off the new behavior when running UI tests so that they reflect our dist compiler. normally that's done by checking `sess.unstable_opts.ui_testing`, but this happens extremely early in the compiler before we've expanded arg files. do an extremely simple hack that doesn't work in all cases - we don't need it to work in all cases, only when running UI tests.
Run `tests/ui/backtrace/std-backtrace.rs` on MSVC.
The original PR which disabled these, https://github.com/rust-lang/rust/pull/62897, only mentions them being broken on i686. ~~let's still make sure the rest of windows is supported.~~ Let's see if we can enable this for msvc now (32-bit and 64-bit).
r? `@jieyouxu`
try-job: x86_64-msvc
try-job: i686-msvc
try-job: i686-mingw
try-job: x86_64-mingw-1
try-job: x86_64-mingw-2
try-job: dist-x86_64-msvc
try-job: dist-i686-msvc
The original PR which disabled these only mentions them being broken on
i686 msvc. Let's try to see if we can reenable this test for msvc (both
32-bit and 64-bit).
Rollup of 3 pull requests
Successful merges:
- #134743 (Default to short backtraces for dev builds of rustc itself)
- #134750 (Update `#[coverage(..)]` attribute error messages to match the current implementation)
- #134751 (Enable LSX feature for LoongArch OpenHarmony target)
r? `@ghost`
`@rustbot` modify labels: rollup
Update `#[coverage(..)]` attribute error messages to match the current implementation
The allowed positions for `#[coverage(..)]` attributes were expanded by #126721, but the corresponding error messages were never updated to reflect the new behaviour.
Part of #134749.
Default to short backtraces for dev builds of rustc itself
A dev build almost certainly means that whoever's built the compiler has the opportunity to rerun it to collect a more complete trace. So we don't need to default to a complete trace; we should hide irrelevant details by default.
compiletest: Support `forbid-output` in UI tests
The `forbid-output` directive is currently only run in incremental tests (although no incremental tests use it). There are some UI tests 'using' it, but it's doing nothing 😄 Let's fix this
Will also PR the dev guide to note this.
dev-guide PR: https://github.com/rust-lang/rustc-dev-guide/pull/2171
