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-rw-r--r--test/fixedbugs/issue42784.go26
1 files changed, 26 insertions, 0 deletions
diff --git a/test/fixedbugs/issue42784.go b/test/fixedbugs/issue42784.go
new file mode 100644
index 0000000..e2b06e9
--- /dev/null
+++ b/test/fixedbugs/issue42784.go
@@ -0,0 +1,26 @@
+// compile
+
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Ensure that late expansion correctly set OpLoad argument type interface{}
+
+package p
+
+type iface interface {
+ m()
+}
+
+type it interface{}
+
+type makeIface func() iface
+
+func f() {
+ var im makeIface
+ e := im().(it)
+ g(e)
+}
+
+//go:noinline
+func g(i it) {}