From snapshot 6.1-20191012

diff --git a/progs/dump_entry.c b/progs/dump_entry.c

index d0e420ec..8a47084a 100644

--- a/progs/dump_entry.c

+++ b/progs/dump_entry.c

@@ -1136,7 +1136,8 @@ fmt_entry(TERMTYPE2 *tterm,

 				*d++ = '\\';

 				*d = ':';

 			    } else if (*d == '\\') {

-				*++d = *s++;

+				if ((*++d = *s++) == '\0')

+				    break;

 			    }

 			    d++;

 			    *d = '\0';