On Sat, Apr 3, 2021 at 7:49 PM Terry Reedy <tjre...@udel.edu> wrote: > On 4/3/2021 7:15 PM, Miro Hrončok wrote: > > On 03. 04. 21 21:44, Łukasz Langa wrote: > >> The memory layout of PyThreadState was unintentionally changed in the > >> recent 3.9.3 bugfix release. This leads to crashes on 32-bit systems > >> when importing binary extensions compiled for Python 3.9.0 - 3.9.2. > >> This is a regression. > >> > >> We will be releasing a hotfix 3.9.4 around 24 hours from now to > >> address this issue and restore ABI compatibility with C extensions > >> built for Python 3.9.0 - 3.9.2. > > > > Thanks for the hotifx. > > > > However, I need to ask: Would this also happen if there was a rc version > > of 3.9.3? > > Unless the mistake was just introduced, the mistake would have happened. > One this severe would likely have been caught within the week or two > before a final. But as Łukasz noted when announcing the change, .rcs > are generally ignored. (I suspect that most everyone assumes that > someone else will test them. And begging people to not do that does not > work well enough to justify the release.) 3.8.5 (2020 July 20 was hotfix > for 3.8.4 (2020 July 14, which did have a candidate, which did not get > tested the way that 3.8.4 itself was. > > -- > Terry Jan Reedy >
For 3.9.4 I suggest a strict revert of the offending change. I created such a PR and attached it to the bpo-43710 issue. It is a holiday weekend for a large swath of the world. The recursion based crasher issue the original change was fixing can be saved for a future release and not made under time pressure. I filed https://bugs.python.org/issue43725 to track one suggested way to help automate prevention of these from landing in a release branch and slipping through the cracks in a release. (discuss that on the issue, not here) -Greg
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