Make sure fmt-write-bloat doesn't vacuously pass on no symbols
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols Previously, the test only checks for the absence of certain panic symbols, but having no symbols was also a possible albeit vacuous way to satisfy this assertion. Fix this by checking we at least observe the `main` symbol which is always expected to be present. Noticed in #142841 (comment). r? `@ChrisDenton` try-job: x86_64-msvc-*
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Hm. Let me try this locally on windows. |
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The failure is not surprising to me. On Windows, symbols are not contained in the binary itself and are instead in a separate file (the .pdb). So the |
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Oh of course... D'oh. Let me see if I can cook something up. |
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fmt-write-bloat doesn't vacuously pass on no symbolsfmt-write-bloat doesn't vacuously pass on no symbols
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[WIP] Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols Previously, the test only checks for the absence of certain panic symbols, but having no symbols was also a possible albeit vacuous way to satisfy this assertion. Fix this by checking we at least observe the `main` symbol which is always expected to be present. Noticed in #142841 (comment). r? `@ChrisDenton` try-job: aarch64-apple try-job: x86_64-apple-1 try-job: x86_64-msvc-1 try-job: i686-msvc-1 try-job: x86_64-mingw-1
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[WIP] Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols Previously, the test only checks for the absence of certain panic symbols, but having no symbols was also a possible albeit vacuous way to satisfy this assertion. Fix this by checking we at least observe the `main` symbol which is always expected to be present. Noticed in #142841 (comment). r? `@ChrisDenton` try-job: aarch64-apple try-job: x86_64-apple-1 try-job: x86_64-msvc-1 try-job: i686-msvc-1 try-job: x86_64-mingw-1
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…enton Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols This PR fixes the `tests/run-make/fmt-write-float/` run-make test to both (1) not vacuously pass on no symbols at all, and (2) compare panics symbols under optimizations versus no optimizations. ### Context Previously, the test only checks for the absence of certain panic symbols, but having no symbols was also a possible albeit vacuous way to satisfy this assertion. Noticed in rust-lang#142841 (comment). r? `@ChrisDenton` try-job: aarch64-apple try-job: aarch64-msvc-1 try-job: x86_64-msvc-1 try-job: i686-msvc-1 try-job: x86_64-mingw-1
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This PR was rebased onto a different master commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
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Oct 18, 2025
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| // NOTE: against the GCC codegen backend, the assertion | ||
| // `object_contains_any_symbol_substring(&expect_panic_symbols, &panic_syms)` fails. | ||
| //@ ignore-backends: gcc |
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Remark: ignoring this test for GCC cg backend, I do not feel like investigating why #147819 (comment) when the GCC cg backend is used, we observe some of these panic symbols.
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Hm, ok that's fair. It feels like this should ideally work with gcc but that needn't be done now. I just hope this isn't a canary warning us the test is going to be flaky 😛.
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Yeah, if the test ends up becoming flaky, I honestly rather disable or even remove this entire test. Because this test is exercising panic-machinery related optimizations through indirect implementation details, and checking for what is there and isn't there are IMO equally prone to "no longer testing what it's supposed to test". This is still the case even if we use DIA wrappers :(
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@bors r+ rollup=iffy (should be fine to rollup if need be though) |
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols This PR fixes the `tests/run-make/fmt-write-float/` run-make test to both (1) not vacuously pass on no symbols at all, and (2) compare panics symbols under optimizations versus no optimizations. ### Context Previously, the test only checks for the absence of certain panic symbols, but having no symbols was also a possible albeit vacuous way to satisfy this assertion. Noticed in #142841 (comment). r? `@ChrisDenton` try-job: aarch64-apple try-job: aarch64-msvc-1 try-job: x86_64-msvc-1 try-job: i686-msvc-1 try-job: x86_64-mingw-1
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The job Click to see the possible cause of the failure (guessed by this bot) |
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💔 Test failed - checks-actions |
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Ah, debug assertions, right |
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This PR fixes the
tests/run-make/fmt-write-float/run-make test to both (1) not vacuously pass on no symbols at all, and (2) compare panics symbols under optimizations versus no optimizations.Context
Previously, the test only checks for the absence of certain panic symbols, but having no symbols was also a possible albeit vacuous way to satisfy this assertion.
Noticed in #142841 (comment).
r? @ChrisDenton
try-job: aarch64-apple
try-job: aarch64-msvc-1
try-job: x86_64-msvc-1
try-job: i686-msvc-1
try-job: x86_64-mingw-1