Fix #1016

diff --git a/lib/common/labels.c b/lib/common/labels.c
index e5eb65e97f8ebf039e6651eb2d5773e785451f83..dfadd2a4c3c7e6c9420b465a6de2ea50440f02c0 100644 (file)
--- a/lib/common/labels.c
+++ b/lib/common/labels.c
@@ -237,6 +237,7 @@ char *strdup_and_subst_obj(char *str, void *obj)
     char *g_str = "\\G", *n_str = "\\N", *e_str = "\\E", *h_str = "\\H", *t_str = "\\T";
     int g_len = 2, n_len = 2, e_len = 2, h_len = 2, t_len = 2, newlen = 0;
 
+    /* prepare substitution strings */
     switch (agobjkind(obj)) {
        case AGGRAPH:
            g_str = ((graph_t *)obj)->name;
@@ -285,7 +286,9 @@ char *strdup_and_subst_obj(char *str, void *obj)
                break;
            case 'T':
                newlen += t_len;
-               break;
+               break; 
+           default:  /* leave other escape sequences unmodified, e.g. \n \l \r */
+               newlen += 2;
            }
        } else {
            newlen++;
@@ -315,7 +318,7 @@ char *strdup_and_subst_obj(char *str, void *obj)
            case 'H':
                for (t = h_str; (*p = *t++); p++);
                break;
-           default:
+           default:  /* leave other escape sequences unmodified, e.g. \n \l \r */
                *p++ = '\\';
                *p++ = c;
                break;