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-rw-r--r--lib/pure/unicode.nim1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/pure/unicode.nim b/lib/pure/unicode.nim
index b550b0eac..8839a7767 100644
--- a/lib/pure/unicode.nim
+++ b/lib/pure/unicode.nim
@@ -39,6 +39,7 @@ proc runeLen*(s: string): int {.rtl, extern: "nuc$1".} =
     doAssert a.runeLen == 6
     ## note: a.len == 8
 
+  result = 0
   var i = 0
   while i < len(s):
     if uint(s[i]) <= 127: inc(i)