On Wed, Mar 07, 2018 at 12:27:34PM -0800, Adam Williamson wrote:
On Wed, 2018-03-07 at 19:50 +0100, Marek Polacek wrote:
> Recently we discovered a serious bug in the compiler whereby we miscompiled
> several packages. The problem started with my ABI-changing patch which changed
> how empty classes are passed, as per the x86_64 psABI (so this bug only affects
> x86_64). The problem could arise when the code contained empty class templates.
> For more info see <https://gcc.gnu.org/PR84502>
> I did another mass rebuild with a specially-tweaked gcc in order to find out
> which packages need to be rebuild with patched gcc-8.0.1-0.16. Sorry about
> This is the list:
This seems like an odd entry. How can a package last built for F24
possibly be affected?
Just guessing; Marek has rebuilt all the non-noarch src.rpm for rawhide
and the package build diagnosed the ABI incompatibility. Perhaps the build
normally only fails later than where the ABI issue was spotted.
The instrumented GCC had a new option to compile using the previous
(8.0.1-0.15 and earlier) wrong behavior and compiled everything twice,
comparing dumps on what would be produced between the two.