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-rw-r--r--src/cmd/compile/internal/noder/helpers.go2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/noder/helpers.go b/src/cmd/compile/internal/noder/helpers.go
index 1f7b497599..f9e3838fd9 100644
--- a/src/cmd/compile/internal/noder/helpers.go
+++ b/src/cmd/compile/internal/noder/helpers.go
@@ -99,6 +99,8 @@ func idealType(tv syntax.TypeAndValue) types2.Type {
typ = types2.Typ[types2.Bool] // expression in "if" or "for" condition
case types2.UntypedString:
typ = types2.Typ[types2.String] // argument to "append" or "copy" calls
+ case types2.UntypedRune:
+ typ = types2.Typ[types2.Int32] // range over rune
default:
return nil
}