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-rw-r--r--test/fixedbugs/issue4085b.go85
1 files changed, 85 insertions, 0 deletions
diff --git a/test/fixedbugs/issue4085b.go b/test/fixedbugs/issue4085b.go
new file mode 100644
index 0000000..cf27512
--- /dev/null
+++ b/test/fixedbugs/issue4085b.go
@@ -0,0 +1,85 @@
+// run
+
+// Copyright 2013 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 main
+
+import (
+ "strings"
+ "unsafe"
+)
+
+type T []int
+
+func main() {
+ n := -1
+ shouldPanic("len out of range", func() { _ = make(T, n) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, n) })
+ shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
+ testMakeInAppend(n)
+
+ var t *byte
+ if unsafe.Sizeof(t) == 8 {
+ // Test mem > maxAlloc
+ var n2 int64 = 1 << 59
+ shouldPanic("len out of range", func() { _ = make(T, int(n2)) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, int(n2)) })
+ testMakeInAppend(int(n2))
+ // Test elem.size*cap overflow
+ n2 = 1<<63 - 1
+ shouldPanic("len out of range", func() { _ = make(T, int(n2)) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, int(n2)) })
+ testMakeInAppend(int(n2))
+ var x uint64 = 1<<64 - 1
+ shouldPanic("len out of range", func() { _ = make([]byte, x) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, x) })
+ testMakeInAppend(int(x))
+ } else {
+ n = 1<<31 - 1
+ shouldPanic("len out of range", func() { _ = make(T, n) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, n) })
+ shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
+ testMakeInAppend(n)
+ var x uint64 = 1<<32 - 1
+ shouldPanic("len out of range", func() { _ = make([]byte, x) })
+ shouldPanic("cap out of range", func() { _ = make(T, 0, x) })
+ testMakeInAppend(int(x))
+ }
+}
+
+func shouldPanic(str string, f func()) {
+ defer func() {
+ err := recover()
+ if err == nil {
+ panic("did not panic")
+ }
+ s := err.(error).Error()
+ if !strings.Contains(s, str) {
+ panic("got panic " + s + ", want " + str)
+ }
+ }()
+
+ f()
+}
+
+// Test make in append panics since the gc compiler optimizes makes in appends.
+func testMakeInAppend(n int) {
+ lengths := []int{0, 1}
+ for _, length := range lengths {
+ t := make(T, length)
+ shouldPanic("len out of range", func() { _ = append(t, make(T, n)...) })
+ shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, n)...) })
+ shouldPanic("len out of range", func() { _ = append(t, make(T, int64(n))...) })
+ shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int64(n))...) })
+ shouldPanic("len out of range", func() { _ = append(t, make(T, uint64(n))...) })
+ shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint64(n))...) })
+ shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
+ shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
+ shouldPanic("len out of range", func() { _ = append(t, make(T, uint(n))...) })
+ shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint(n))...) })
+ }
+}