https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66725
Bug ID: 66725
Summary: Issue with silent conversion int to char, struggling
in gfc_widechar_to_char
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gerhard.steinmetz.fort...@t-online.de
Target Milestone: ---
Sometimes a silent conversion from integer to character occurs
where it should not IMO, but should give an explicit error instead.
If this integer value n is too "large" (n > 255 or n < -255),
an ICE occurs (gfc_widechar_to_char).
This happens for several io statements and several specifiers.
An integer value at this place is wrong anyway.
Required is e.g. a scalar-default-char-expr.
Maybe wrong caret position is an aftereffect.
$ cat z_iostmt_status_257.f90
program p
open (1, status=257)
end
$ gfortran -g -Wall -fcheck=all -fno-frontend-optimize z_iostmt_status_257.f90
f951: internal compiler error: in gfc_widechar_to_char, at
fortran/scanner.c:197
---
$ cat z_iostmt_status_100.f90
program p
open (1, status=100) ! wrong data type !<<<
end
$ gfortran -g -Wall -fcheck=all -fno-frontend-optimize z_iostmt_status_100.f90
z_iostmt_status_100.f90:2:48:
open (1, status=100) ! wrong data type !<<<
1
Error: STATUS specifier in OPEN statement at (1) has invalid value 'd'
---
$ cat z_iostmt_asynchronous_999.f90
program p
write (1, asynchronous=999)
end
$ gfortran z_iostmt_asynchronous_999.f90
f951: internal compiler error: in gfc_widechar_to_char, at
fortran/scanner.c:197
---
$ cat z_iostmt_asynchronous_104.f90
program p
write (1, asynchronous=104) ! wrong data type !<<<
end
$ gfortran z_iostmt_asynchronous_104.f90
z_iostmt_asynchronous_104.f90:2:55:
write (1, asynchronous=104) ! wrong data type !<<<
1
Error: ASYNCHRONOUS specifier in WRITE statement at (1) has invalid value 'h'
