[Bug fortran/78758] [7 Regression] Warning: '__builtin_memcpy' ... overflows the destination for string assignment
anlauf at gmx dot de
gcc-bugzilla@gcc.gnu.org
Fri Dec 9 21:59:00 GMT 2016
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78758
--- Comment #1 from Harald Anlauf <anlauf at gmx dot de> ---
Slightly reduced variant:
integer function get_satid (name)
character(len=*), intent(in) :: name
character(len=16) :: longname
integer, external :: satid_longname
! longname(1:) = " " // adjustl (name(1:)) ! No warning
longname(2:) = " " // adjustl (name(2:)) ! Warning
get_satid = satid_longname (longname)
end function get_satid
produces:
gfcbug137.f90:7:0:
longname(2:) = " " // adjustl (name(2:)) ! Warning
Warning: '__builtin_memcpy' writing 15 bytes into a region of size 14 overflows
the destination [-Wstringop-overflow=]
I looked at the dump tree differences for the two variants indicated above,
but frankly, I do not understand what's going on here.
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