Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/test/fixedbugs/issue10353.go b/test/fixedbugs/issue10353.go
new file mode 100644
index 0000000..87771d4
--- /dev/null
+++ b/test/fixedbugs/issue10353.go
@@ -0,0 +1,49 @@
+// run
+
+// Copyright 2015 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.
+
+// issue 10253: cmd/gc: incorrect escape analysis of closures
+// Partial call x.foo was not promoted to heap.
+
+package main
+
+func main() {
+	c := make(chan bool)
+	// Create a new goroutine to get a default-size stack segment.
+	go func() {
+		x := new(X)
+		clos(x.foo)()
+		c <- true
+	}()
+	<-c
+}
+
+type X int
+
+func (x *X) foo() {
+}
+
+func clos(x func()) func() {
+	f := func() {
+		print("")
+		x() // This statement crashed, because the partial call was allocated on the old stack.
+	}
+	// Grow stack so that partial call x becomes invalid if allocated on stack.
+	growstack(10000)
+	c := make(chan bool)
+	// Spoil the previous stack segment.
+	go func() {
+		c <- true
+	}()
+	<-c
+	return f
+}
+
+func growstack(x int) {
+	if x == 0 {
+		return
+	}
+	growstack(x - 1)
+}