lidavidm commented on a change in pull request #11207:
URL: https://github.com/apache/arrow/pull/11207#discussion_r714339906
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File path: cpp/src/arrow/util/async_generator.h
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@@ -221,6 +221,9 @@ class MappingGenerator {
bool should_trigger;
{
auto guard = state->mutex.Lock();
+ // A MappedCallback may have purged or be purging the queue;
+ // we shouldn't do anything here.
+ if (state->finished) return;
Review comment:
Ah I figured it would be something like that, I added the test here.
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