https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123306
--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Eric Botcazou <[email protected]>: https://gcc.gnu.org/g:d0b3d120bc1792974c1b600e277716781b3dae35 commit r16-7812-gd0b3d120bc1792974c1b600e277716781b3dae35 Author: Eric Botcazou <[email protected]> Date: Fri Feb 27 19:54:33 2026 +0100 Ada: Fix assertion failure for unfrozen mutably tagged type as actual This is a follow-up to the fix done last December at: https://gcc.gnu.org/pipermail/gcc-patches/2025-December/704521.html The fix is not sufficient when nested layers of generics are involved, so this changes the implementation of mutably tagged types to have the declaration of their CW-equivalent type immediately analyzed. But this in turn requires making sure that the root type is frozen before the CW-equivalent type in all cases. gcc/ada/ PR ada/123306 * freeze.adb (Freeze_Entity): For a class-wide equivalent type of a non-interface root type, freeze the root type before it. * sem_ch3.adb (Derived_Type_Declaration): Minor tweak. * sem_ch12.adb (Analyze_One_Association): Revert latest change. * sem_ch13.adb (Analyze_Attribute_Definition_Clause) <Size>: When the prefix is a class-wide type, insert the declaration of the CW- equivalent type immediately after that of the root type, and the size check for the root type into its own freezing actions. gcc/testsuite/ * gnat.dg/specs/mutably_tagged2.ads: New test.
