The Heisenbug lurking in your async code (Python)

• CPython

  345 55,759 9.9 Python

  The Python programming language

  

  There's a GitHub issue to fix this, arguing that the doc fixes are insufficient, consider it to be a design mistake, and argue that it can be changed without breaking backwards compatibility (current GC behavior is not deterministic): https://github.com/python/cpython/issues/91887

  Latest reply from GvR is invoking Chesterton's Fence.

• node

  3 1,032 8.4 Go

  Mysterium Network Node - official implementation of distributed VPN network (dVPN) protocol (by mysteriumnetwork)

  

  Yes, it's visible on goroutine profile, provided by built-in profiler pprof. E.g.: https://github.com/mysteriumnetwork/node/issues/5311#issueco...

• Sonar

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• trio

  8 5,549 9.3 Python

  Trio – a friendly Python library for async concurrency and I/O

  

  I'll +1 the Trio shoutout [1], but it's worth emphasizing that the core concept of Trio (nurseries) now exists in the stdlib in the form of task groups [2]. The article mentions this very briefly, but it's easy to miss, and I wouldn't describe it as a solution to this bug, anyways. Rather, it's more of a different way of writing multitasking code, which happens to make this class of bug impossible.

  [1] https://github.com/python-trio/trio

  [2] https://docs.python.org/3/library/asyncio-task.html#task-gro...

• DistorteD

  5 14 0.0 Ruby

  Ruby multimedia toolkit with deep Jekyll integration 🧪

  I experienced a heisenbug exactly like this in Ruby when trying to `while case Ractor::receive`: https://github.com/okeeblow/DistorteD/blob/dd2a99285072982d3...

• uBlock-Origin-dev-filter

  12 1,963 0.0 Python

  Filters to block and remove copycat-websites from DuckDuckGo, Google and other search engines. Specific to dev websites like StackOverflow or GitHub.

• Mergify

  blog.mergify.com

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