8139150: ClassVerifier frees exception message while it's still in use

Summary: Remove ResourceMark in StackMapReader::parse_verification_type() to avoid freeing of error message.
Reviewed-by: zmajo, dcubed, hseigel

src/share/vm/classfile/stackMapTable.cpp

@@ -186,7 +186,6 @@ VerificationType StackMapReader::parse_verification_type(u1* flags, TRAPS) {
     u2 offset = _stream->get_u2(THREAD);
     if (offset >= _code_length ||
         _code_data[offset] != ClassVerifier::NEW_OFFSET) {
-      ResourceMark rm(THREAD);
       _verifier->class_format_error(
         "StackMapTable format error: bad offset for Uninitialized");
       return VerificationType::bogus_type();