Stop compilation early if macro expansion failed #144409

GuillaumeGomez · 2025-07-24T16:04:57Z

So there isn't really a type that is central for macro expansion and some errors are actually emitted (because the resolution happens after the expansion I suppose) after the expansion pass (like "not found macro"). Sometimes, errors are only emitted on the second "try" (to improve error output). So I couldn't reach a similar solution than what was done in #133937 and suggested by @estebank in #116180 (comment). But maybe I missed something?

So in the end, I realized that there is method called every time (except one, described below) a macro error is actually emitted: ExtCtxt::trace_macros_diag. Considering I updated what it did, I renamed it into macro_error_and_trace_macros_diag to better reflect it.

There is only one call of trace_macros_diag which isn't reporting an error but just used for macro_trace feature, so I kept it as is.

r? @oli-obk

tests/ui/editions/edition-keywords-2018-2015-2.rs

tests/ui/editions/edition-keywords-2018-2015-parsing.rs

GuillaumeGomez · 2025-07-24T17:00:50Z

Removed split ui tests to trigger old errors but in separate files.

tests/ui/const-generics/min_const_generics/macro-fail.rs

compiler/rustc_interface/src/passes.rs

oli-obk · 2025-07-25T10:01:11Z

r=me with nit (should allow reverting the changes to the timed closure)

GuillaumeGomez · 2025-07-25T12:29:58Z

@bors r=oli rollup

bors · 2025-07-25T12:30:01Z

📌 Commit faa28f9 has been approved by oli

It is now in the queue for this repository.

GuillaumeGomez · 2025-07-25T12:30:09Z

Got the handle wrong...

@bors r=oli-obk

bors · 2025-07-25T12:30:11Z

💡 This pull request was already approved, no need to approve it again.

There's another pull request that is currently being tested, blocking this pull request: Rollup of 12 pull requests #144440

bors · 2025-07-25T12:30:12Z

📌 Commit faa28f9 has been approved by oli-obk

It is now in the queue for this repository.

…ly-abort, r=oli-obk Stop compilation early if macro expansion failed Fixes rust-lang#116180. So there isn't really a type that is central for macro expansion and some errors are actually emitted (because the resolution happens after the expansion I suppose) after the expansion pass (like "not found macro"). Sometimes, errors are only emitted on the second "try" (to improve error output). So I couldn't reach a similar solution than what was done in rust-lang#133937 and suggested by `@estebank` in rust-lang#116180 (comment). But maybe I missed something? So in the end, I realized that there is method called every time (except one, described below) a macro error is actually emitted: `ExtCtxt::trace_macros_diag`. Considering I updated what it did, I renamed it into `macro_error_and_trace_macros_diag` to better reflect it. There is only one call of `trace_macros_diag` which isn't reporting an error but just used for `macro_trace` feature, so I kept it as is. r? `@oli-obk`

Rollup of 13 pull requests Successful merges: - #144356 (Add `ignore-backends` annotations in failing GCC backend ui tests) - #144359 (add codegen test for variadics) - #144376 (Suggest unwrapping when private method name is available in inner type) - #144379 (test using multiple c-variadic ABIs in the same program) - #144383 (disable cfg.has_reliable_f128 on amdgcn) - #144409 (Stop compilation early if macro expansion failed) - #144412 (Small cleanup: Use LocalKey<Cell> methods more) - #144421 (Call `is_parsed_attribute` rather than keeping track of a list of parsed attributes manually) - #144422 (library/windows_targets: Fix macro expansion error in 'link' macro) - #144424 (Allow setting `release-blog-post` label with rustbot) - #144430 (tests: aarch64-outline-atomics: Remove hardcoded target) - #144435 (rustc-dev-guide subtree update) - #144445 (Fix `./x check bootstrap` (again)) r? `@ghost` `@rustbot` modify labels: rollup

GuillaumeGomez · 2025-07-25T20:53:58Z

Failed in #144450.

GuillaumeGomez · 2025-07-25T20:54:03Z

@bors r-

GuillaumeGomez · 2025-07-25T21:16:07Z

Just in case.

@bors try

rust-bors · 2025-07-25T21:16:11Z

⌛ Trying commit a0d6db3 with merge 443457b…

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

…=<try> Stop compilation early if macro expansion failed

compiler/rustc_interface/src/passes.rs

rust-bors · 2025-07-25T23:31:06Z

☀️ Try build successful (CI)
Build commit: 443457b (443457b816e475c3fb59bab3aff59b7fa9d55f8c, parent: a955f1cd09a027363729ceed919952d09f76f28e)

GuillaumeGomez · 2025-07-26T09:33:01Z

@bors r=oli-obk

bors · 2025-07-26T09:33:04Z

📌 Commit 2725138 has been approved by oli-obk

It is now in the queue for this repository.

…ly-abort, r=oli-obk Stop compilation early if macro expansion failed Fixes rust-lang#116180. So there isn't really a type that is central for macro expansion and some errors are actually emitted (because the resolution happens after the expansion I suppose) after the expansion pass (like "not found macro"). Sometimes, errors are only emitted on the second "try" (to improve error output). So I couldn't reach a similar solution than what was done in rust-lang#133937 and suggested by `@estebank` in rust-lang#116180 (comment). But maybe I missed something? So in the end, I realized that there is method called every time (except one, described below) a macro error is actually emitted: `ExtCtxt::trace_macros_diag`. Considering I updated what it did, I renamed it into `macro_error_and_trace_macros_diag` to better reflect it. There is only one call of `trace_macros_diag` which isn't reporting an error but just used for `macro_trace` feature, so I kept it as is. r? `@oli-obk`

Rollup of 10 pull requests Successful merges: - #144359 (add codegen test for variadics) - #144409 (Stop compilation early if macro expansion failed) - #144422 (library/windows_targets: Fix macro expansion error in 'link' macro) - #144430 (tests: aarch64-outline-atomics: Remove hardcoded target) - #144445 (Fix `./x check bootstrap` (again)) - #144453 (canonicalize build root in `tests/run-make/linker-warning`) - #144454 (move uefi test to run-make) - #144464 (Only run bootstrap tests in `x test` on CI) - #144495 (bump cargo_metadata) - #144500 (thread name in stack overflow message) r? `@ghost` `@rustbot` modify labels: rollup

…ly-abort, r=oli-obk Stop compilation early if macro expansion failed Fixes rust-lang#116180. So there isn't really a type that is central for macro expansion and some errors are actually emitted (because the resolution happens after the expansion I suppose) after the expansion pass (like "not found macro"). Sometimes, errors are only emitted on the second "try" (to improve error output). So I couldn't reach a similar solution than what was done in rust-lang#133937 and suggested by ``@estebank`` in rust-lang#116180 (comment). But maybe I missed something? So in the end, I realized that there is method called every time (except one, described below) a macro error is actually emitted: `ExtCtxt::trace_macros_diag`. Considering I updated what it did, I renamed it into `macro_error_and_trace_macros_diag` to better reflect it. There is only one call of `trace_macros_diag` which isn't reporting an error but just used for `macro_trace` feature, so I kept it as is. r? ``@oli-obk``

Rollup of 9 pull requests Successful merges: - #144359 (add codegen test for variadics) - #144409 (Stop compilation early if macro expansion failed) - #144422 (library/windows_targets: Fix macro expansion error in 'link' macro) - #144430 (tests: aarch64-outline-atomics: Remove hardcoded target) - #144445 (Fix `./x check bootstrap` (again)) - #144453 (canonicalize build root in `tests/run-make/linker-warning`) - #144454 (move uefi test to run-make) - #144464 (Only run bootstrap tests in `x test` on CI) - #144495 (bump cargo_metadata) r? `@ghost` `@rustbot` modify labels: rollup

…ly-abort, r=oli-obk Stop compilation early if macro expansion failed Fixes rust-lang#116180. So there isn't really a type that is central for macro expansion and some errors are actually emitted (because the resolution happens after the expansion I suppose) after the expansion pass (like "not found macro"). Sometimes, errors are only emitted on the second "try" (to improve error output). So I couldn't reach a similar solution than what was done in rust-lang#133937 and suggested by ```@estebank``` in rust-lang#116180 (comment). But maybe I missed something? So in the end, I realized that there is method called every time (except one, described below) a macro error is actually emitted: `ExtCtxt::trace_macros_diag`. Considering I updated what it did, I renamed it into `macro_error_and_trace_macros_diag` to better reflect it. There is only one call of `trace_macros_diag` which isn't reporting an error but just used for `macro_trace` feature, so I kept it as is. r? ```@oli-obk```

Rollup of 13 pull requests Successful merges: - #144359 (add codegen test for variadics) - #144379 (test using multiple c-variadic ABIs in the same program) - #144383 (disable cfg.has_reliable_f128 on amdgcn) - #144409 (Stop compilation early if macro expansion failed) - #144422 (library/windows_targets: Fix macro expansion error in 'link' macro) - #144429 (Enable outline-atomics for aarch64-unknown-linux-musl) - #144430 (tests: aarch64-outline-atomics: Remove hardcoded target) - #144445 (Fix `./x check bootstrap` (again)) - #144453 (canonicalize build root in `tests/run-make/linker-warning`) - #144464 (Only run bootstrap tests in `x test` on CI) - #144470 (clif: Don't set the `compiler-builtins-no-f16-f128` feature) - #144480 (Revert "coverage: Enlarge empty spans during MIR instrumentation, not codegen") - #144495 (bump cargo_metadata) r? `@ghost` `@rustbot` modify labels: rollup

Rollup of 13 pull requests Successful merges: - #141840 (If `HOME` is empty, use the fallback instead) - #144359 (add codegen test for variadics) - #144379 (test using multiple c-variadic ABIs in the same program) - #144383 (disable cfg.has_reliable_f128 on amdgcn) - #144409 (Stop compilation early if macro expansion failed) - #144422 (library/windows_targets: Fix macro expansion error in 'link' macro) - #144429 (Enable outline-atomics for aarch64-unknown-linux-musl) - #144430 (tests: aarch64-outline-atomics: Remove hardcoded target) - #144445 (Fix `./x check bootstrap` (again)) - #144453 (canonicalize build root in `tests/run-make/linker-warning`) - #144464 (Only run bootstrap tests in `x test` on CI) - #144470 (clif: Don't set the `compiler-builtins-no-f16-f128` feature) - #144480 (Revert "coverage: Enlarge empty spans during MIR instrumentation, not codegen") r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of #144409 - GuillaumeGomez:macro-expansion-early-abort, r=oli-obk Stop compilation early if macro expansion failed Fixes #116180. So there isn't really a type that is central for macro expansion and some errors are actually emitted (because the resolution happens after the expansion I suppose) after the expansion pass (like "not found macro"). Sometimes, errors are only emitted on the second "try" (to improve error output). So I couldn't reach a similar solution than what was done in #133937 and suggested by ````@estebank```` in #116180 (comment). But maybe I missed something? So in the end, I realized that there is method called every time (except one, described below) a macro error is actually emitted: `ExtCtxt::trace_macros_diag`. Considering I updated what it did, I renamed it into `macro_error_and_trace_macros_diag` to better reflect it. There is only one call of `trace_macros_diag` which isn't reporting an error but just used for `macro_trace` feature, so I kept it as is. r? ````@oli-obk````

rustbot assigned oli-obk Jul 24, 2025

rustbot added 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 24, 2025

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Rollup of 13 pull requests #144450

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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-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Jul 25, 2025

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Auto merge of #144409 - GuillaumeGomez:macro-expansion-early-abort, r…

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…=<try> Stop compilation early if macro expansion failed

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GuillaumeGomez added 3 commits July 25, 2025 23:46

Stop compilation if macro expansion failed

96340f6

Add missing NOTE annotations in tests/ui/macros/trace-macro.rs

5dddba5

Update ui tests with new macro early erroring

2725138

GuillaumeGomez force-pushed the macro-expansion-early-abort branch from a0d6db3 to 2725138 Compare July 25, 2025 21:46

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Rollup of 10 pull requests #144508

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Rollup of 9 pull requests #144516

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Rollup of 13 pull requests #144520

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Rollup of 13 pull requests #144526

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bors merged commit c92d61d into rust-lang:master Jul 27, 2025
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GuillaumeGomez deleted the macro-expansion-early-abort branch July 27, 2025 09:21

Stop compilation early if macro expansion failed #144409

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