async: clear callback function pointer after use (#992) #993
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This solve some strange race condition which results in calling `cb` twice for one async work object.
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I think we can merge both PR's, it's a bit redundant, but it does not hurt much and prevent maybe other bugs, the root cause was wrong free list handling: #995 |
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This solve some strange race condition which results in calling
cbtwice forone async work object.