Adding upstream version 1.20.14.upstream/1.20.14upstream

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

1 files changed, 44 insertions, 0 deletions

diff --git a/test/fixedbugs/issue35518.go b/test/fixedbugs/issue35518.go
new file mode 100644
index 0000000..52a0ae7
--- /dev/null
+++ b/test/fixedbugs/issue35518.go
@@ -0,0 +1,44 @@
+// errorcheck -0 -l -m=2
+
+// Copyright 2019 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.
+
+// This test makes sure that -m=2's escape analysis diagnostics don't
+// go into an infinite loop when handling negative dereference
+// cycles. The critical thing being tested here is that compilation
+// succeeds ("errorcheck -0"), not any particular diagnostic output,
+// hence the very lax ERROR patterns below.
+
+package p
+
+type Node struct {
+	Orig *Node
+}
+
+var sink *Node
+
+func f1() {
+	var n Node // ERROR "."
+	n.Orig = &n
+
+	m := n // ERROR "."
+	sink = &m
+}
+
+func f2() {
+	var n1, n2 Node // ERROR "."
+	n1.Orig = &n2
+	n2 = n1
+
+	m := n2 // ERROR "."
+	sink = &m
+}
+
+func f3() {
+	var n1, n2 Node // ERROR "."
+	n1.Orig = &n1
+	n1.Orig = &n2
+
+	sink = n1.Orig.Orig
+}