Found using valgrind:
gfortran gfortran.dg/backspace_5.f
valgrind ./a.out
==15340== Syscall param write(buf) points to uninitialised byte(s)
==15340== at 0x56000C0: __write_nocancel (in /lib64/libc-2.5.so)
==15340== by 0x4EBEE90: do_write (unix.c:336)
==15340== by 0x4EBEF31: fd_flush (unix.c:386)
==15340== by 0x4EBCBF6: _gfortran_st_write_done (transfer.c:2762)
==15340== by 0x400BAB: MAIN__ (in
/projects/tob/gcc/gcc/testsuite/gfortran.dg/a.out)
==15340== by 0x40104B: main (fmain.c:22)
Similarly for:
- backspace_6.f
- write_back.f
- write_rewind_1.f
- write_rewind_2.f
- char_bounds_check_fail_1.f90
- direct_io_2.f90
- unf_io_convert_3.f90
--
Summary: Use of uninitialized variables in libgfortran's I/O
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: burnus at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31297
