https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85521
--- Comment #1 from G. Steinmetz <gs...@t-online.de> --- $ cat z2.f90 program p character(3) :: c = 'abc' character(3) :: z(1) z = [ c(:-2) ] print *, z end $ gfortran-8-20180422 -c z2.f90 z2.f90:4:0: z = [ c(:-2) ] Warning: '__builtin_memmove' specified size 18446744073709551614 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]