1 files changed, 17 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/syntax/testdata/issue47704.go b/src/cmd/compile/internal/syntax/testdata/issue47704.go
new file mode 100644
index 0000000..e4cdad1
--- /dev/null
+++ b/src/cmd/compile/internal/syntax/testdata/issue47704.go
@@ -0,0 +1,17 @@
+// Copyright 2021 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.
+
+package p
+
+func _() {
+	_ = m[] // ERROR expected operand
+	_ = m[x,]
+	_ = m[x /* ERROR unexpected a */ a b c d]
+}
+
+// test case from the issue
+func f(m map[int]int) int {
+	return m[0 // ERROR expected comma, \: or \]
+		]
+}