[Bug sanitizer/63690] New: [5 Regression] ICE: tree check: expected class 'expression', have 'constant' (string_cst) with -fsanitize=undefined

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63690

            Bug ID: 63690
           Summary: [5 Regression] ICE: tree check: expected class
                    'expression', have 'constant' (string_cst) with
                    -fsanitize=undefined
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org

Created attachment 33848
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33848&action=edit
reduced testcase

Compiler output:
$ gcc -fsanitize=undefined testcase.c 
testcase.c: In function 'foo':
testcase.c:5:1: internal compiler error: tree check: expected class
'expression', have 'constant' (string_cst) in tree_operand_check, at
tree.h:3190
 }
 ^
0xdfd8c7 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/tree.c:9242
0x54743b expr_check(tree_node*, char const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/tree.h:2902
0x54743b tree_operand_check(tree_node*, int, char const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/tree.h:3190
0xbd99c8 tree_operand_check(tree_node*, int, char const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/tree.h:2733
0xbd99c8 instrument_object_size
        /mnt/svn/gcc-trunk/gcc/ubsan.c:1485
0xbdd439 execute
        /mnt/svn/gcc-trunk/gcc/ubsan.c:1649
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r216859 - ICE
4_9 r216431 - OK