diff -Naur ctags-5.8.orig/lregex.c ctags-5.8/lregex.c

--- ctags-5.8.orig/lregex.c	2007-09-10 04:36:48.000000000 +0200

+++ ctags-5.8/lregex.c	2014-04-14 21:09:17.716000000 +0200

@@ -408,7 +408,7 @@

 		const char* regexfile = parameter + 1;

 		FILE* const fp = fopen (regexfile, "r");

 		if (fp == NULL)

-			error (WARNING | PERROR, regexfile);

+			error (WARNING | PERROR, "%s", regexfile);

 		else

 		{

 			vString* const regex = vStringNew ();