This testcase segfaults in find_lattice_value() in tree-complex.c line 116:
_Complex float f (_Complex float b, _Complex float c) { _Complex float a = 1.0 + 0.0i; return a / c; } gcc -O x.c x.c: In function f: x.c:2: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. (gdb) bt #0 find_lattice_value (t=0x0) at ../../gcc-svn/trunk/gcc/tree-complex.c:116 #1 0x0000000000853e50 in set_component_ssa_name (ssa_name=0x0, imag_p=0 '\0', value=0x2aaaad95b600) at ../../gcc-svn/trunk/gcc/tree-complex.c:485 #2 0x0000000000854126 in update_complex_components_on_edge (e=0x2aaaad95b300, lhs=0x0, r=Variable "r" is not available. ) at ../../gcc-svn/trunk/gcc/tree-complex.c:608 #3 0x00000000008579eb in tree_lower_complex () at ../../gcc-svn/trunk/gcc/tree-complex.c:658 -- Summary: Segfault in find_lattice_value() for complex operands. Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: uros at kss-loka dot si GCC build triplet: x86_64-pc-linux-gnu GCC host triplet: x86_64-pc-linux-gnu GCC target triplet: x86_64-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26869