http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54678
Bug #: 54678
Summary: second call to get_environment_variable gives valgrind
warning with 8-byte integers
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ajma...@googlemail.com
Seen with this cut-down example (test.f90):
program test
implicit none
character(len=1024) :: a
call get_environment_variable("HOME",a)
write(6,*)'HOME=',trim(a)
call get_environment_variable("HOME",a)
write(6,*)'HOME=',trim(a)
end
Compiling with:
gfortran -g -fdefault-integer-8 test.f90
and running valgrind on the resulting executable gives a warning about an
uninitialized variable on the second call to get_environment_variable:
==13919== Conditional jump or move depends on uninitialised value(s)
==13919== at 0x4F14DF4: _gfortran_get_environment_variable_i4 (in
/usr/lib64/libgfortran.so.3.0.0)
==13919== by 0x4F14F62: _gfortran_get_environment_variable_i8 (in
/usr/lib64/libgfortran.so.3.0.0)
==13919== by 0x4009AC: MAIN__ (test.f90:6)
==13919== by 0x400AA4: main (test.f90:8)
Compiling with default (4-byte) integers does not show the problem, i.e.:
gfortran -g test.f90
