https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123832
--- Comment #6 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:19b33d2388a7a3df194297e7941f02baafcc6777 commit r15-10745-g19b33d2388a7a3df194297e7941f02baafcc6777 Author: Eric Botcazou <[email protected]> Date: Wed Jan 28 23:31:49 2026 +0100 Ada: Fix stack corruption with concatenation and 'Image of composite type The issue is that the expansion of 'Image for composite types is heavyweight and involves a mix of Expression_With_Actions and controlled object that does not work properly when it is the argument of a call to a subprogram, so this replaces it by the canonical scheme used for controlled temporaries. gcc/ada/ PR ada/123832 * exp_imgv.adb: Add with and use clauses for Exp_Ch7. (Expand_Image_Attribute): Establish a transient scope before rewriting the attribute as a call to Put_Image. (Expand_Wide_Image_Attribute): Likewise. (Expand_Wide_Wide_Image_Attribute): Likewise. * exp_put_image.ads (Build_Image_Call): Add note about the need for a transient scope when the function is invoked. * exp_put_image.adb (Build_Image_Call): Call Insert_Actions to immediately insert the actions instead of wrapping them in an Expression_With_Actions node. gcc/testsuite/ * gnat.dg/put_image2.adb: New test.
