Issue #21286 has been updated by MSP-Greg (Greg L). Maybe gcc-15 could be added to https://github.com/ruby/ruby/blob/master/.github/workflows/compilers.yml? We don't know if this is a Windows only issue or if this is an issue with all OS's using gcc. Also, see info in [Porting to GCC 15](https://gcc.gnu.org/gcc-15/porting_to.html)? We could force setup-ruby to install gcc-14, and bypass the upgrade to gcc-15? It would take a little work... ---------------------------------------- Bug #21286: Windows - MSYS2 just updated to GCC 15.1.0, builds failing https://bugs.ruby-lang.org/issues/21286#change-112811 * Author: MSP-Greg (Greg L) * Status: Open * ruby -v: master * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- MSYS2 just updated to GCC 15.1.0, and the ruby-loco builds failed to compile. See [MinGW](https://github.com/MSP-Greg/ruby-loco/actions/runs/14693708990/job/412325097...) & [UCRT](https://github.com/MSP-Greg/ruby-loco/actions/runs/14693775816/job/412326620...) Also, I compiled mswin locally with the recent VS 'preview' release, and the bug has been fixed. -- https://bugs.ruby-lang.org/