Don't suggest types whose inner type is erroneous #91450
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r? @estebank (rust-highfive has picked a reviewer for you, use r? to override) |
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☔ The latest upstream changes (presumably #91354) made this pull request unmergeable. Please resolve the merge conflicts. |
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Could you add the code from the issue as a test case? |
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r=me with a test and resolved merge conflict (please squash your changes to a single commit on top of recent master). |
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| // This test ensures that the compiler does not suggest `Foo<[type error]>` in diagnostic messages. | ||
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| fn foo() -> Option<_> {} //~ ERROR: [E0308] | ||
| //~^ ERROR: the type placeholder `_` is not allowed |
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I wanted to add a "negative" test of "help: replace with the correct return type: Foo<[type error]>" here to detect any regressions in the future but IIRC there isn't such annotation ;)
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I don't think I have the permission to do it but let me try |
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@hkmatsumoto: 🔑 Insufficient privileges: Not in reviewers |
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Fair enough, @estebank could you take another look? |
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@bors r+ |
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📌 Commit f8b8a5c96ad2fc7231d5da8e98d2eb130460f9c3 has been approved by |
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☔ The latest upstream changes (presumably #91491) made this pull request unmergeable. Please resolve the merge conflicts. |
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Currently, we check if the returned type equals to `tcx.ty_error()` not to emit erroneous types, but this has a pitfall; for example, `Option<[type error]> != tcx.ty_error()` holds.
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@bors r=estebank |
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📌 Commit 9b77a1e has been approved by |
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…askrgr Rollup of 4 pull requests Successful merges: - rust-lang#90529 (Skip reborrows in AbstractConstBuilder) - rust-lang#91437 (Pretty print empty blocks as {}) - rust-lang#91450 (Don't suggest types whose inner type is erroneous) - rust-lang#91535 (Stabilize `-Z emit-future-incompat` as `--json future-incompat`) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
Currently, we check if the returned type equals to
tcx.ty_error()not to emiterroneous types, but this has a pitfall; for example,
Option<[type error]> != tcx.ty_error()holds.Fixes #91371.