https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123306
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-15 branch has been updated by Eric Botcazou <[email protected]>: https://gcc.gnu.org/g:7f6720874b48df2d81188ce88a2ea8b95e405254 commit r15-10639-g7f6720874b48df2d81188ce88a2ea8b95e405254 Author: Eric Botcazou <[email protected]> Date: Sat Dec 27 10:24:52 2025 +0100 Ada: Fix assertion failure for unfrozen mutably tagged type as actual ...in instance. An instantiation is a freezing point for the actuals, so the mutably tagged type will be frozen by the instantiation, but this happens too late in the current implementation of mutably tagged types, because the declaration of their CW-equivalent type is not analyzed until after the type is frozen. gcc/ada/ PR ada/123306 * sem_ch12.adb (Analyze_One_Association): Immediately freeze the root type of mutably tagged types used as actual type parameters. gcc/testsuite/ * gnat.dg/specs/mutably_tagged1.ads: New test.
