https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117783
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:b7e4b5e862fcb12cfeaa3bee4e8c77098201d5f4 commit r16-3122-gb7e4b5e862fcb12cfeaa3bee4e8c77098201d5f4 Author: Jakub Jelinek <ja...@redhat.com> Date: Mon Aug 11 09:02:38 2025 +0200 c++: Fix up handling of name independent structured binding packs [PR117783] I've realized I haven't added testsuite coverage for name independent structured binding packs. And the auto [i, ..._, j] = T {}; auto [k, ..._, l] = T {}; case shows a problem with that. The elements of the structured binding pack have #i appended to their names, so for the _ case e.g. _#0, _#1 etc. (to print something useful in diagnostics, perhaps debug info later on). The above is valid though as long as one doesn't use _ (which is ambiguous), but we were emitting errors on redeclaration of _#0, _#1 etc. The following patch uses DECL_NAME (decl) = NULL_TREE; for the name independent decl case so that the false positive redeclaration errors aren't emitted. 2025-08-11 Jakub Jelinek <ja...@redhat.com> PR c++/117783 * decl.cc (set_sb_pack_name): For name independent decls just clear DECL_NAME instead of appending #i to it. * g++.dg/cpp26/name-independent-decl11.C: New test.
