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Make sure fmt-write-bloat doesn't vacuously pass on no symbols #143669

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@jieyouxu jieyouxu commented Jul 9, 2025 •
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Warning

TODO: fixup PR description.

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) actually check against the panic symbols.

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.

Fix this by checking we at least observe the main symbol which is always expected to be present.

Noticed in #142841 (comment).

r? @ChrisDenton

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try-job: x86_64-msvc-1
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@rustbot rustbot added A-run-make Area: port run-make Makefiles to rmake.rs S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 9, 2025
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rust-bors bot added a commit that referenced this pull request Jul 9, 2025
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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
9306675 
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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jieyouxu commented Jul 9, 2025

Hm. Let me try this locally on windows.

@jieyouxu jieyouxu 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 Jul 9, 2025
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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 object crate would not be able to find them.

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jieyouxu commented Jul 9, 2025 •
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Oh of course... D'oh. Let me see if I can cook something up.

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@jieyouxu jieyouxu changed the title Make sure fmt-write-bloat doesn't vacuously pass on no symbols [WIP] Make sure fmt-write-bloat doesn't vacuously pass on no symbols Jul 9, 2025
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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
a1b33a4 
[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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jieyouxu commented Jul 9, 2025

llvm-pdbutil is an fallback approach, trying pdb crate to see if that works under CI conditions.

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rust-bors bot added a commit that referenced this pull request Jul 9, 2025
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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
1d2e78e 
[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
@jieyouxu jieyouxu mentioned this pull request Jul 9, 2025
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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols

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jieyouxu commented Oct 4, 2025

@bors try

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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols

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jieyouxu commented Oct 4, 2025

@bors try

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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols

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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols

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rustbot commented Oct 5, 2025

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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jieyouxu commented Oct 5, 2025

@bors try

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Auto merge of #143669 - jieyouxu:fmt-write-bloat, r=<try>
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Make sure `fmt-write-bloat` doesn't vacuously pass on no symbols

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⌛ Trying commit 53bc614 with merge 05ee95b…

To cancel the try build, run the command @bors try cancel.

Workflow: https://github.com/rust-lang/rust/actions/runs/18258228372

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