Make error reporting resilient to exception thrown while reporting #20158
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Previously the added test failed with `1 error reported` but no actual error message printed, because a stack overflow is thrown while reporting the original error. This is then caught and handled to emit a RecursionOverflow error, but that second error is non-sensical and non-sensical errors are only printed if `hasErrors` returns false. We fix this by deferring incrementing the error count (and therefore having `hasErrors` return true) until after having displayed the error. We also defer calling `markReported` otherwise the second error will also be suppressed. A similar change is necessary in our testing infrastructure to keep the error count is coherent.
Member
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would this fix let me revert this commit? 5aca2da |
Member
Author
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Hmm, I don't know but I would guess not. |
odersky
approved these changes
Apr 11, 2024
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Previously the added test failed with
1 error reportedbut no actual error message printed, because a stack overflow is thrown while reporting the original error. This is then caught and handled to emit a RecursionOverflow error, but that second error is non-sensical and non-sensical errors are only printed ifhasErrorsreturns false.We fix this by deferring incrementing the error count (and therefore having
hasErrorsreturn true) until after having displayed the error. We also defer callingmarkReportedotherwise the second error will also be suppressed. A similar change is necessary in our testing infrastructure to keep the error count is coherent.