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-rw-r--r--compiler/ccgutils.nim2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/ccgutils.nim b/compiler/ccgutils.nim
index 54af3c705..7396c0bf8 100644
--- a/compiler/ccgutils.nim
+++ b/compiler/ccgutils.nim
@@ -171,7 +171,7 @@ proc mangle*(name: string): string =
   ## Lowercases the given name and manges any non-alphanumeric characters
   ## so they are represented as `HEX____`. If the name starts with a number,
   ## `N` is prepended
-  result = ""
+  result = newStringOfCap(name.len)
   case name[0]
   of Letters:
     result.add(name[0].toLower)