# HG changeset patch
# User Bryan O'Sullivan <bryano@fb.com>
# Date 2012-05-08 21:48:44
# Node ID 8f79aabd96f6de4c10cf8996b803fd8319fc74a9
# Parent  96fa9dd1db38fe6b241554423d42fd93d1a4be6b

parsers: allow nt_find to signal an ambiguous match

diff --git a/mercurial/parsers.c b/mercurial/parsers.c
--- a/mercurial/parsers.c
+++ b/mercurial/parsers.c
@@ -544,6 +544,13 @@ static inline int nt_level(const char *n
 	return v & 0xf;
 }
 
+/*
+ * Return values:
+ *
+ *   -4: match is ambiguous (multiple candidates)
+ *   -2: not found
+ * rest: valid rev
+ */
 static int nt_find(indexObject *self, const char *node, Py_ssize_t nodelen)
 {
 	int level, off;
@@ -572,7 +579,8 @@ static int nt_find(indexObject *self, co
 			return -2;
 		off = v;
 	}
-	return -2;
+	/* multiple matches against an ambiguous prefix */
+	return -4;
 }
 
 static int nt_new(indexObject *self)