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gh-115398: Increment PyExpat_CAPI_MAGIC for SetReparseDeferralEnabled addition#116301
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This is a followup to git commit6a95676 from Github PRpython#115623.
This was referencedMar 4, 2024
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woodruffw pushed a commit to woodruffw-forks/cpython that referenced this pull requestMar 4, 2024
…nabled addition (pythonGH-116301)* Increment PyExpat_CAPI_MAGIC due to SetReparseDeferralEnabled addition.This is a followup to git commit6a95676 from Github PRpython#115623.* RESTify news API list.
This looks unnecessary: There's an extra size field that's also checked. See#115623 (comment) . |
hartwork added a commit to hartwork/cpython that referenced this pull requestMar 6, 2024
…eferralEnabled addition (pythonGH-116301)"This reverts part of commiteda2963.
It's also hurting, so I have created pull request#116411 now to revert the bump. |
gpshead pushed a commit that referenced this pull requestMar 6, 2024
Revert "gh-115398: Increment PyExpat_CAPI_MAGIC for SetReparseDeferralEnabled addition (GH-116301)"This reverts part of commiteda2963. Why? this comment buried in an earlier code review explains:I checked again how that value is used in practice, it's here:https://github.com/python/cpython/blob/0c80da4c14d904a367968955544dd6ae58c8101c/Modules/_elementtree.c#L4363-L4372Based on that code my understanding is that loading bigger structs from the future is considered okay unless `PyExpat_CAPI_MAGIC` differs, which implies that (1) magic needs to stay the same to support loading the future from the past and (2) that `PyExpat_CAPI_MAGIC` should only ever change for changes that do not increase size (but keep it constant).To summarize, that supports your argument.I checked branches 3.8, 3.9, 3.10, 3.11, 3.12 now and they all have the same comparison code there so reverting that magic string bump will support seamless backporting.
I hadn't seen the earlier review comment, I just looked at the history of the magic and saw it was bumped up to 1.1 during a bugfix release 6+ years ago. I trust y'all's analysis. revert merged. |
adorilson pushed a commit to adorilson/cpython that referenced this pull requestMar 25, 2024
…nabled addition (pythonGH-116301)* Increment PyExpat_CAPI_MAGIC due to SetReparseDeferralEnabled addition.This is a followup to git commit6a95676 from Github PRpython#115623.* RESTify news API list.
adorilson pushed a commit to adorilson/cpython that referenced this pull requestMar 25, 2024
…16411)Revert "pythongh-115398: Increment PyExpat_CAPI_MAGIC for SetReparseDeferralEnabled addition (pythonGH-116301)"This reverts part of commiteda2963. Why? this comment buried in an earlier code review explains:I checked again how that value is used in practice, it's here:https://github.com/python/cpython/blob/0c80da4c14d904a367968955544dd6ae58c8101c/Modules/_elementtree.c#L4363-L4372Based on that code my understanding is that loading bigger structs from the future is considered okay unless `PyExpat_CAPI_MAGIC` differs, which implies that (1) magic needs to stay the same to support loading the future from the past and (2) that `PyExpat_CAPI_MAGIC` should only ever change for changes that do not increase size (but keep it constant).To summarize, that supports your argument.I checked branches 3.8, 3.9, 3.10, 3.11, 3.12 now and they all have the same comparison code there so reverting that magic string bump will support seamless backporting.
diegorusso pushed a commit to diegorusso/cpython that referenced this pull requestApr 17, 2024
…nabled addition (pythonGH-116301)* Increment PyExpat_CAPI_MAGIC due to SetReparseDeferralEnabled addition.This is a followup to git commit6a95676 from Github PRpython#115623.* RESTify news API list.
diegorusso pushed a commit to diegorusso/cpython that referenced this pull requestApr 17, 2024
…16411)Revert "pythongh-115398: Increment PyExpat_CAPI_MAGIC for SetReparseDeferralEnabled addition (pythonGH-116301)"This reverts part of commiteda2963. Why? this comment buried in an earlier code review explains:I checked again how that value is used in practice, it's here:https://github.com/python/cpython/blob/0c80da4c14d904a367968955544dd6ae58c8101c/Modules/_elementtree.c#L4363-L4372Based on that code my understanding is that loading bigger structs from the future is considered okay unless `PyExpat_CAPI_MAGIC` differs, which implies that (1) magic needs to stay the same to support loading the future from the past and (2) that `PyExpat_CAPI_MAGIC` should only ever change for changes that do not increase size (but keep it constant).To summarize, that supports your argument.I checked branches 3.8, 3.9, 3.10, 3.11, 3.12 now and they all have the same comparison code there so reverting that magic string bump will support seamless backporting.
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Increment PyExpat_CAPI_MAGIC due to SetReparseDeferralEnabled addition.
This is a followup to git commit6a95676 from Github PR#115623.
Also ReSTify's the NEWS entry.
XML_SetReparseDeferralEnabled#115398