1 files changed, 54 insertions, 0 deletions
diff --git a/test/fixedbugs/issue37975.go b/test/fixedbugs/issue37975.go
new file mode 100644
index 0000000000..a4e8f1f14a
--- /dev/null
+++ b/test/fixedbugs/issue37975.go
@@ -0,0 +1,54 @@
+// run
+
+// 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.
+
+// Make sure runtime.panicmakeslice* are called.
+
+package main
+
+import "strings"
+
+func main() {
+	// Test typechecking passes if len is valid
+	// but cap is out of range for len's type.
+	var x byte
+	_ = make([]int, x, 300)
+
+	capOutOfRange := func() {
+		i := 2
+		s := make([]int, i, 1)
+		s[0] = 1
+	}
+	lenOutOfRange := func() {
+		i := -1
+		s := make([]int, i, 3)
+		s[0] = 1
+	}
+
+	tests := []struct {
+		f        func()
+		panicStr string
+	}{
+		{capOutOfRange, "cap out of range"},
+		{lenOutOfRange, "len out of range"},
+	}
+
+	for _, tc := range tests {
+		shouldPanic(tc.panicStr, tc.f)
+	}
+
+}
+
+func shouldPanic(str string, f func()) {
+	defer func() {
+		err := recover()
+		runtimeErr := err.(error).Error()
+		if !strings.Contains(runtimeErr, str) {
+			panic("got panic " + runtimeErr + ", want " + str)
+		}
+	}()
+
+	f()
+}