[Bug c/59998] New: [4.9 regression] internal compiler error: SSA corruption: Unable to coalesce ssa_names 4 and 135 which are marked as MUST COALESCE.

["gerald at pfeifer dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59998

            Bug ID: 59998
           Summary: [4.9 regression] internal compiler error: SSA
                    corruption: Unable to coalesce ssa_names 4 and 135
                    which are marked as MUST COALESCE.
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gerald at pfeifer dot com

Created attachment 31993
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31993&action=edit
serialize.i (input file causing ICE with "gcc -O2")

% ~/gcc-ref10-i386/bin/gcc -c -O2 serialize.i

Unable to coalesce ssa_names 4 and 135 which are marked as MUST COALESCE.
pbElement_4(ab) and  pbElement_135(ab)
serialize.c: In function 'CRYPT_ReadSerializedElement':
serialize.c:295:13: internal compiler error: SSA corruption
 const void *CRYPT_ReadSerializedElement(const BYTE *pbElement, DWORD
cbElement,
             ^

(This is from Wine, dlls/crypt32/serialize.c.)