https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125393
Bug ID: 125393
Summary: Wcharacter-truncation false positive for character
arrays
Product: gcc
Version: 16.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: ajmay81 at gmail dot com
Target Milestone: ---
Sending an element of a character array gets reported as sending a string
totalling the whole array size. Example:
module test
implicit none
contains
subroutine a(string)
character(len=2) string
end subroutine a
subroutine b
character(len=2) :: s1
character(len=2), dimension(2) :: s2
call a(s1)
call a(s2(1))
end subroutine b
end module test
This gives:
# > gfortran -c -Wcharacter-truncation test.f90
test.f90:13:7:
13 | call a(s2(1))
| 1
Warning: Character length of actual argument longer than of dummy argument
'string' (4/2) at (1) [-Wcharacter-truncation]
# > gfortran --version
GNU Fortran (SUSE Linux) 16.1.1 20260508
