onig_syntax_warn 2968 regparse.c         onig_syntax_warn(env, "character class has '%s' without escape", c);
onig_syntax_warn 2978 regparse.c         onig_syntax_warn(env, "regular expression has '%s' without escape", c);
onig_syntax_warn 2990 regparse.c         onig_syntax_warn(env, "character class has duplicated range");
onig_syntax_warn 2998 regparse.c       onig_syntax_warn(env, "Unknown escape \\%c is ignored", c);
onig_syntax_warn 3168 regparse.c     	onig_syntax_warn(env, "invalid Unicode Property \\%c", c);
onig_syntax_warn 3709 regparse.c     	  onig_syntax_warn(env, "invalid back reference");
onig_syntax_warn 3762 regparse.c     	  onig_syntax_warn(env, "invalid subexp call");
onig_syntax_warn 3794 regparse.c     	onig_syntax_warn(env, "invalid Unicode Property \\%c", c);
onig_syntax_warn 5441 regparse.c                   onig_syntax_warn(env, "regular expression has redundant nested repeat operator '%s'",
onig_syntax_warn 5449 regparse.c                   onig_syntax_warn(env, "nested repeat operator '%s' and '%s' was replaced with '%s' in regular expression",