https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29465
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- The -Wrestrict warning (new in GCC 7) points out this bug. Unfortunately, the option is not in -Wall or -Wextra and must be explicitly enabled so few users will benefit from it. $ gcc -S -Wrestrict t.c t.c: In function ‘main’: t.c:6:13: warning: passing argument 1 to restrict-qualified parameter aliases with argument 2 [-Wrestrict] memcpy (&i, &i, sizeof i); ^~ ~~ *** This bug has been marked as a duplicate of bug 35503 ***