Don't leak exceptions from managed threads #92
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edsko
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Sep 28, 2023
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Fixed. |
kazu-yamamoto
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Sep 28, 2023
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Merged. |
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Jul 19, 2024
In kazu-yamamoto#92 we added an exception handler that was meant to catch _all_ exceptions (sync and async). This got changed in kazu-yamamoto#114 (specifically, kazu-yamamoto@52a9619): when we moved from `Control.Exception` to `UnliftIO.Exception`, we got a different behaviour for `catch` and friends (see well-typed/grapesy#193 (comment)) for a full list. This commit fixes some unintended consequences of this change.
edsko
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Jul 23, 2024
In kazu-yamamoto#92 we added an exception handler that was meant to catch _all_ exceptions (sync and async). This got changed in kazu-yamamoto#114 (specifically, kazu-yamamoto@52a9619): when we moved from `Control.Exception` to `UnliftIO.Exception`, we got a different behaviour for `catch` and friends (see well-typed/grapesy#193 (comment)) for a full list. This commit fixes some unintended consequences of this change.
edsko
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Jul 24, 2024
In kazu-yamamoto#92 we added an exception handler that was meant to catch _all_ exceptions (sync and async). This got changed in kazu-yamamoto#114 (specifically, kazu-yamamoto@52a9619): when we moved from `Control.Exception` to `UnliftIO.Exception`, we got a different behaviour for `catch` and friends (see well-typed/grapesy#193 (comment)) for a full list. This commit fixes some unintended consequences of this change.
edsko
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to edsko/http2
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Jul 24, 2024
In kazu-yamamoto#92 we added an exception handler that was meant to catch _all_ exceptions (sync and async). This got changed in kazu-yamamoto#114 (specifically, kazu-yamamoto@52a9619): when we moved from `Control.Exception` to `UnliftIO.Exception`, we got a different behaviour for `catch` and friends (see well-typed/grapesy#193 (comment)) for a full list. This commit fixes some unintended consequences of this change.
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This PR makes a subtle but useful change to
forkManaged[Unmask]: instead of usingonException(which is whatbracketdoes), we usecatch:onExceptionwill rethrow the exception, but this is not very useful: the only exception handler that sits above the thread is the one installed by default byforkIOWithUnmask, which just prints the exception to the terminal. As a result, when the thread manager shuts down managed threads, sometimes thoseKilledByHttp2ThreadManagerexceptions were printed to the terminal, interfering with the regular output of the program. (Specifically, I was observing this with the thread spawned byforkAndEnqueueWhenReadyinArch/Sender.hs.)