REG_EPAREN        474 lib/regcomp.c      ret = REG_EPAREN;
REG_EPAREN       2462 lib/regcomp.c  	  *err = REG_EPAREN;
REG_EPAREN        835 src/regex-emacs.c    [REG_EPAREN] = "Unmatched ( or \\(",
REG_EPAREN       2658 src/regex-emacs.c     FREE_STACK_RETURN (REG_EPAREN);