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bpo-40120: Fix unbounded struct char[] undefined behavior. #19232

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gpshead wants to merge 5 commits into from
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bpo-40120: Fix unbounded struct char[] undefined behavior. #19232

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809f263
Fix undefined behavior in PyBytesObject.
gpshead Mar 30, 2020
d3329fe
Fix unicode's struct encoding_map similarly.
gpshead Mar 30, 2020
a1759d9
Describe the + 1 used in PyBytesObject_SIZE.
gpshead Mar 30, 2020
630a26a
news!
gpshead Mar 30, 2020
cd483f6
Fix test_sys, it encoded the struct definition.
gpshead Mar 30, 2020
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gpshead committed Mar 30, 2020
commit 630a26aa2151cd42051fe8ad4d62f5c82cf1659b
4 changes: 4 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2020-03-30-14-06-40.bpo-40120.6ptcf4.rst
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Fixed internal structure definitions for structs such as PyBytesObject and
unicode's encoding_map to not rely on C undefined behavior for access to
their trailing unbounded character array in favor of C99 approved flexible
array member syntax.