https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90353
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> --- (from https://stackoverflow.com/q/55977431/1918193) Thanks. except.c (initialize_handler_parm) says: /* Make sure we mark the catch param as used, otherwise we'll get a warning about an unused ((anonymous)). */ TREE_USED (decl) = 1; DECL_READ_P (decl) = 1; But removing the TREE_USED line generates a nice "warning: unused variable 'k'". Running the testsuite with such a patch may help locate a testcase that explains why this code is there.
