Index: read.c
===================================================================
--- read.c	(revision 28768)
+++ read.c	(revision 28769)
@@ -144,7 +144,7 @@
 	pcb_append_printf(&str, "io_kicad parse error at %d.%d: ", subtree->line, subtree->col);
 
 	va_start(ap, fmt);
-	pcb_append_vprintf(&str, fmt, ap);
+	pcb_safe_append_vprintf(&str, 0, fmt, ap);
 	va_end(ap);
 
 	gds_append(&str, '\n');
@@ -164,7 +164,7 @@
 	pcb_append_printf(&str, "io_kicad warning at %d.%d: ", subtree->line, subtree->col);
 
 	va_start(ap, fmt);
-	pcb_append_vprintf(&str, fmt, ap);
+	pcb_safe_append_vprintf(&str, 0, fmt, ap);
 	va_end(ap);
 
 	gds_append(&str, '\n');