Don't allow an empty flag name to --info & --debug.

3 files changed, 12 insertions, 10 deletions

diff --git a/NEWS b/NEWS
index 10719884..740cb340 100644
--- a/NEWS
+++ b/NEWS
@@ -20,9 +20,13 @@ Changes since 3.1.1:
       right.
     - Don't create an empty backup dir for a transferred file that doesn't
       exist yet.
+    - Fixed a bug where --link-dest and --xattrs could cause rsync to exit if
+      a filename had a matching dir of the same name in the alt-dest area.
     - Allow more than 32 group IDs per user in the daemon's gid=LIST config.
     - Fix the logging of %b & %c via --log-file (daemon logging was already
       correct, as was --out-format='%b/%c').
+    - Fix erroneous acceptance of --info=5 & --debug=5 (an empty flag name is
+      not valid).
 
   ENHANCEMENTS:
 
diff --git a/OLDNEWS b/OLDNEWS
index 5a33d7ae..295ab2e7 100644
--- a/OLDNEWS
+++ b/OLDNEWS
@@ -3650,7 +3650,7 @@ Changes since 2.4.6:
 
 Partial Protocol History
 	RELEASE DATE	VER.	DATE OF COMMIT*	PROTOCOL
-	?? Aug 2015	3.1.2			31
+	?? Dec 2015	3.1.2			31
 	22 Jun 2014	3.1.1			31
 	28 Sep 2013	3.1.0	31 Aug 2008	31
 	23 Sep 2011	3.0.9			30
diff --git a/options.c b/options.c
index 7e93ea1e..74239bf2 100644
--- a/options.c
+++ b/options.c
@@ -411,16 +411,17 @@ static void parse_output_words(struct output_struct *words, short *levels,
 	const char *s;
 	int j, len, lev;
 
-	if (!str)
-		return;
-
-	while (*str) {
+	for ( ; str; str = s) {
 		if ((s = strchr(str, ',')) != NULL)
 			len = s++ - str;
 		else
 			len = strlen(str);
-		while (len && isDigit(str+len-1))
-			len--;
+		if (!len)
+			continue;
+		if (!isDigit(str)) {
+			while (len && isDigit(str+len-1))
+				len--;
+		}
 		lev = isDigit(str+len) ? atoi(str+len) : 1;
 		if (lev > MAX_OUT_LEVEL)
 			lev = MAX_OUT_LEVEL;
@@ -448,9 +449,6 @@ static void parse_output_words(struct output_struct *words, short *levels,
 				words[j].help, len, str);
 			exit_cleanup(RERR_SYNTAX);
 		}
-		if (!s)
-			break;
-		str = s;
 	}
 }