[Bug fortran/35892] [4.4 regression] gfortran dies on file containing module and common

["tkoenig at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #3 from tkoenig at gcc dot gnu dot org  2008-04-13 20:45 -------
Interesting.  Running with valgrind produces an ICE:

$ valgrind  ~/libexec/gcc/i686-pc-linux-gnu/4.4.0/f951 foo.f90 
==3891== Memcheck, a memory error detector.
==3891== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==3891== Using LibVEX rev 1804, a library for dynamic binary translation.
==3891== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==3891== Using valgrind-3.3.0-Debian, a dynamic binary instrumentation
framework.
==3891== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==3891== For more details, rerun with: -v
==3891== 
 MAIN__==3891== Invalid read of size 4
==3891==    at 0x80F3D8D: gfc_conv_expr_val (trans-expr.c:3611)
==3891==  Address 0x4 is not stack'd, malloc'd or (recently) free'd

foo.f90:4: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
==3891== 
==3891== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 15 from 1)
==3891== malloc/free: in use at exit: 249,564 bytes in 1,061 blocks.
==3891== malloc/free: 1,592 allocs, 531 frees, 289,234 bytes allocated.
==3891== For counts of detected errors, rerun with: -v
==3891== searching for pointers to 1,061 not-freed blocks.
==3891== checked 2,099,868 bytes.
==3891== 
==3891== LEAK SUMMARY:
==3891==    definitely lost: 108 bytes in 2 blocks.
==3891==      possibly lost: 176 bytes in 14 blocks.
==3891==    still reachable: 249,280 bytes in 1,045 blocks.
==3891==         suppressed: 0 bytes in 0 blocks.
==3891== Rerun with --leak-check=full to see details of leaked memory.

Running under gdb yields

(gdb) r -fdefault-integer-8 -g f12_integrals.f 
Starting program: /home/ig25/libexec/gcc/i686-pc-linux-gnu/4.4.0/f951
-fdefault-integer-8 -g f12_integrals.f
 df_fit_f12 tranop_f12 f12_unidom f12_listmo f12_integrals_jinv
f12_integrals_2idx f12_integrals_til f12_integrals_bar f12_integrals_srt {GC
5430k -> 2061k} f12_integrals_raw
Program received signal SIGSEGV, Segmentation fault.
0x08234a2c in fold_binary (code=MINUS_EXPR, type=0xb7b404b0, op0=0xb7baf688,
op1=0xb7bf6070) at ../../../gcc/trunk/gcc/fold-const.c:9920
9920              && !HONOR_SIGNED_ZEROS (TYPE_MODE (TREE_TYPE (arg0)))


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35892