Fix dropped errors in manifold.go-off
#249
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Timeout tests are changed so that every timeout exception has a uniquely identifiable message which makes it easier to match up the dropped error warning with the originating timeout.
| (catch Throwable ex | ||
| (d/error! (async-runtime/aget-object state async-runtime/USER-START-IDX) ex) | ||
| (throw ex)))) | ||
| (d/error! (async-runtime/aget-object state async-runtime/USER-START-IDX) ex)))) |
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I haven't used this code in years, can't say I remember why we were re-throwing the original error
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Thanks for your reply! Alright, I'll try to get to the bottom of this myself then 💪
valerauko
reviewed
Sep 30, 2025
| (is (= ::timeout @(go-off (<!? (d/alt (d/deferred) (d/timeout! (d/deferred) 10 ::timeout)))))) | ||
| (is (= ::timeout @(d/alt (go-off (<!? (d/deferred))) (d/timeout! (d/deferred) 10 ::timeout)))) | ||
| (is (= ::timeout @(go-off (<!? (d/alt (d/deferred) (d/timeout! (d/deferred) 13 ::timeout)))))) | ||
| (is (= ::timeout @(d/alt (go-off (<!? (d/deferred))) (d/timeout! (d/deferred) 14 ::timeout)))) |
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why is this change necessary?
| (try (async-runtime/run-state-machine state) | ||
| (catch Throwable ex | ||
| (d/error! (async-runtime/aget-object state async-runtime/USER-START-IDX) ex) | ||
| (throw ex)))) |
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was this rethrow the core of the issue?
since you're catching the extremely wide Throwable it'd feel safer to keep the rethrow unless that's what's causing the problem
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Timeout tests are changed so that every timeout exception has a uniquely identifiable message which makes it easier to match up the dropped error warning with the originating timeout.
Based on #248. Fixes the remaining dropped error failure in
manifold.go-off-test.@tanzoniteblack Sine you're the original author of
manifold.go-off, maybe you could review this one? 🙏 I'm not quite sure whether not re-throwing the exception here breaks anything else, and if it should, maybe you could provide a test case? It definitely does lead to an unhandled deferred in error state, though, as evidenced by the test failure without the patch. However, I don't even grok which deferred that is 😅