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[Bug fortran/40440] [4.4/4.5 Regression] Garbage or segmentation fault in allocatable array derived type structures



------- Comment #3 from burnus at gcc dot gnu dot org  2009-06-15 08:52 -------
(In reply to comment #2)
> COmplete code for the test case including the module iso_varying_string

Works with: gfortran 4.3.3, ifort 11, sunf95, NAG f95 5.1 (w/o flush
statements)
Fails (abort) with gfortran 4.4.1/4.5

Valgrind shows several uninitialized accesses (gfortran 4.3.3, 4.4, and 4.5),
but no errors with NAG f95 or ifort. Interestingly, it runs through with
valgrind + gfortran 4.5, which means that it could be no regression and working
in 4.3.3 only by chance.

valgrind finds essentially the following two errors with gfortran 4.5:

 Invalid read of size 1
    at 0x4091FC: __iso_varying_string_MOD_char_auto (foo.f90:868)
    by 0x40B73F: __syntax_rules_MOD_monitor_syntax_rules (foo.f90:3450)
    by 0x40B8F5: __syntax_rules_MOD_syntax_get_rule_ptr (foo.f90:3431)
    by 0x40C242: set_children.6490 (foo.f90:3410)
    by 0x40C933: __syntax_rules_MOD_set_rule_contents (foo.f90:3366)
    by 0x40E9E5: __syntax_rules_MOD_syntax_init_from_ifile (foo.f90:3287)
    by 0x412C6E: MAIN__ (foo.f90:3472)

 Use of uninitialised value of size 8
    at 0x40C261: set_children.6490 (foo.f90:3410)
    by 0x40C933: __syntax_rules_MOD_set_rule_contents (foo.f90:3366)
    by 0x40E9E5: __syntax_rules_MOD_syntax_init_from_ifile (foo.f90:3287)
    by 0x412C6E: MAIN__ (foo.f90:3472)
    by 0x412D09: main (foo.f90:3462)


-- 

burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
      Known to fail|                            |4.4.1 4.5.0
      Known to work|                            |4.3.3
            Summary|[4.5.0 Regression] Garbage  |[4.4/4.5 Regression] Garbage
                   |or segmentation fault in    |or segmentation fault in
                   |allocatable array derived   |allocatable array derived
                   |type structures             |type structures
   Target Milestone|---                         |4.4.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40440


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