Public bug reported:
gcc-10 was SRUed to focal, and in the process introduced regressions
caused by ABI breakage of libgphobos1.
This has manifested as failing autopkgtests of the dub package,
following unrelated SRUs:
[...]
autopkgtest [13:52:44]: test run: - - - - - - - - - - stderr - - - - - - - - -
-
dub: symbol lookup error: dub: undefined symbol:
_D3std3net4curl4HTTP9__mixin376onSendMFNdDFAvZmZv
[...]
The symbol present in the new version of libgphobos1 is now
_D3std3net4curl4HTTP9__mixin396onSendMFNdDFAvZmZv instead of
_D3std3net4curl4HTTP9__mixin376onSendMFNdDFAvZmZv.
Libraries are not allowed to change ABI without changing binary package
name. And for libraries built from such a core package as gcc, ABIs
should be enforced at package build time to avoid such regressions.
This regression was overlooked at the time of gcc SRU because the
autopkgtests for gcc uploads are special-cased to not test all reverse-
dependencies; so it's incumbent on gcc to properly enforce ABI
stability.
** Affects: gcc-10 (Ubuntu)
Importance: Critical
Status: New
** Tags: fr-844 regression-update
** Changed in: gcc-10 (Ubuntu)
Importance: Undecided => Critical
** Tags added: regression-update
** Tags added: fr-844
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https://bugs.launchpad.net/bugs/1901080
Title:
libgphobos1: ABI breakage in SRU
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