https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94769
Bug ID: 94769
Summary: Possible use of uninitialized variable num
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: stefansf at linux dot ibm.com
Target Milestone: ---
In function check_io_constraints local variable num is supposed to be
initialized by function compare_to_allowed_values. While bootstrapping GCC on
S/390 I get the following warning/error:
gcc/fortran/io.c: In function 'bool gfc_resolve_dt(gfc_code*, gfc_dt*,
locus*)':
gcc/fortran/io.c:3857:7: error: 'num' may be used uninitialized in this
function [-Werror=maybe-uninitialized]
3857 | if (num == 0)
| ^~
gcc/fortran/io.c:3843:11: note: 'num' was declared here
3843 | int num;
I'm not sure whether a sensible default value for num should be 0 or 1.
