http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52774
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Keywords| |wrong-code
Last reconfirmed| |2012-04-02
CC| |burnus at gcc dot gnu.org,
| |pault at gcc dot gnu.org
Ever Confirmed|0 |1
Summary|A check is needed to |Derived-type assignment:
|prevent deallocation in |check required to prevent
|realloc-lhs |double deallocation of
| |allocatable component
Known to fail| |4.3.4, 4.7.1, 4.8.0
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-04-02
16:36:17 UTC ---
Confirmed.
Remarks:
a) The reduced program in comment 0 is invalid: As "p1%p" is not allocated,
accessing it with print *, p1%p is invalid - and is likely to segfault.
Solution: Use print *, allocated (p1%p) which shall print "F";
that still gives the expected segfault or "invalid free()" errors from
valgrind with current gfortran - as expected.
b) The issue is unrelated to realloc on assignment and seems to be related to
allocatable components (TR 15581, a GCC 4.2 feature). At least the program
in comment 0 [modified as in comment (a)] also fails with GCC 4.3, using
-fno-realloc-lhs does not help, and valgrind shows the same failure.
