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-rw-r--r--test/fixedbugs/issue37975.go54
1 files changed, 54 insertions, 0 deletions
diff --git a/test/fixedbugs/issue37975.go b/test/fixedbugs/issue37975.go
new file mode 100644
index 0000000..a4e8f1f
--- /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()
+}