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-rw-r--r--test/fixedbugs/issue17318.go47
1 files changed, 47 insertions, 0 deletions
diff --git a/test/fixedbugs/issue17318.go b/test/fixedbugs/issue17318.go
new file mode 100644
index 0000000..21df729
--- /dev/null
+++ b/test/fixedbugs/issue17318.go
@@ -0,0 +1,47 @@
+// errorcheck -0 -N -m -l
+
+// Copyright 2016 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.
+
+// The escape analyzer needs to run till its root set settles
+// (this is not that often, it turns out).
+// This test is likely to become stale because the leak depends
+// on a spurious-escape bug -- return an interface as a named
+// output parameter appears to cause the called closure to escape,
+// where returning it as a regular type does not.
+
+package main
+
+import (
+ "fmt"
+)
+
+type closure func(i, j int) ent
+
+type ent int
+
+func (e ent) String() string {
+ return fmt.Sprintf("%d", int(e)) // ERROR "... argument does not escape$" "int\(e\) escapes to heap$"
+}
+
+//go:noinline
+func foo(ops closure, j int) (err fmt.Stringer) { // ERROR "ops does not escape"
+ enqueue := func(i int) fmt.Stringer { // ERROR "func literal does not escape"
+ return ops(i, j) // ERROR "ops\(i, j\) escapes to heap$"
+ }
+ err = enqueue(4)
+ if err != nil {
+ return err
+ }
+ return // return result of enqueue, a fmt.Stringer
+}
+
+func main() {
+ // 3 identical functions, to get different escape behavior.
+ f := func(i, j int) ent { // ERROR "func literal does not escape"
+ return ent(i + j)
+ }
+ i := foo(f, 3).(ent)
+ fmt.Printf("foo(f,3)=%d\n", int(i)) // ERROR "int\(i\) escapes to heap$" "... argument does not escape$"
+}