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-rw-r--r--lib/util.js1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/util.js b/lib/util.js
index 0a6356c..90fc55a 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -6,6 +6,7 @@ var u = exports
u.ssbRefRegex = /((?:@|%|&|ssb:\/\/%)[A-Za-z0-9\/+]{43}=\.[\w\d]+)/g
u.isRef = function (str) {
+ if (!str) return false
u.ssbRefRegex.lastIndex = 0
return u.ssbRefRegex.test(str)
}