http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59350
--- Comment #32 from David Binderman <dcb314 at hotmail dot com> --- Same error with gcc trunk, dated 20131215, for attached source code. Flags -O3 -g -fPIC -fstack-protector-strong required. [dcb@zippy4 foundBugs]$ ../results/bin/gcc -c -O3 -g -fPIC -fstack-protector-strong bug126.c zprime.c: In function ‘zfactor’: zprime.c:577:1: internal compiler error: in vt_expand_var_loc_chain, at var-tracking.c:8213 0xd1b1d0 vt_expand_var_loc_chain ../../src/trunk/gcc/var-tracking.c:8213 0xd1b5c7 vt_expand_loc_callback ../../src/trunk/gcc/var-tracking.c:8409 0x6d44de cselib_expand_value_rtx_1 ../../src/trunk/gcc/cselib.c:1684 0x6d44de cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def* (*)(rtx_def*, bitmap_head*, int, void*), void*) ../../src/trunk/gcc/cselib.c:1531 ...