diff -r f86f0b054464 -r 17408c3607ce src/c2html.c
--- a/src/c2html.c	Tue Aug 23 17:31:15 2016 +0200
+++ b/src/c2html.c	Thu Aug 25 11:30:30 2016 +0200
@@ -53,7 +53,7 @@
     ucx_buffer_putc(dest, '\n');
 }
 
-int formatlines(highlighter_func highlighter,
+void formatlines(highlighter_func highlighter,
         UcxList *in, write_func out, void *stream, int showlineno) {
     
     /* compute width of line numbering */
@@ -68,7 +68,8 @@
     /* allocate line buffer */
     UcxBuffer *line = ucx_buffer_new(NULL, 1024, UCX_BUFFER_AUTOEXTEND);
     if(!line) {
-        return 1;
+        perror("Error allocating line buffer for output");
+        return;
     }
     
     /* start monospace formatting */
@@ -93,7 +94,7 @@
         /* process code line */
         highlighter(sourceline->data, line, &multiline_comment);
         
-        /* write code line and reset buffer */
+        /* write code line */
         out(line->space, 1, line->size, stream);
     }
     
@@ -102,7 +103,6 @@
     
     /* cleanup and return */
     ucx_buffer_free(line);
-    return 0;
 }
 
 #define FILEBUF_SIZE 4096