[Patch, Fortran] PR 40246 - nullify pointer to fix ice-on-invalid-code

[Tobias Burnus]

Dear all,

the following patch fixes an ICE in NULLIFY, which only
occurs if there are more than one arguments of which
one is invalid. The problem is that new_st->next is
freed but new_st.next still points to the old memory
address.

For the test case I have, it does not matter, but I
think one also needs to free new_st->expr1 and ->expr2,
even though valgrind shows no difference for the
attached example.

The other question is whether one needs a test case or
not. I included one ...

Build on x86-64-linux and currently regtesting.
OK for the trunk (assuming successful regtesting)?

Tobias
-------------- next part --------------
A non-text attachment was scrubbed...
Name: nullify.diff
Type: text/x-patch
Size: 1091 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20090527/541885f3/attachment.bin>