1 files changed, 62 insertions, 0 deletions
diff --git a/test/fixedbugs/issue32187.go b/test/fixedbugs/issue32187.go
new file mode 100644
index 0000000..268da81
--- /dev/null
+++ b/test/fixedbugs/issue32187.go
@@ -0,0 +1,62 @@
+// run
+
+// 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.
+
+// short-circuiting interface-to-concrete comparisons
+// will not miss panics
+
+package main
+
+import (
+	"log"
+	"strings"
+)
+
+func main() {
+	var (
+		x interface{}
+		p *int
+		s []int
+		l *interface{}
+		r []*int
+	)
+	tests := []struct {
+		name   string
+		errStr string
+		f      func()
+	}{
+		{"switch case", "", func() {
+			switch x {
+			case x.(*int):
+			}
+		}},
+		{"interface conversion", "", func() { _ = x == x.(error) }},
+		{"type assertion", "", func() { _ = x == x.(*int) }},
+		{"out of bounds", "", func() { _ = x == s[1] }},
+		{"nil pointer dereference #1", "", func() { _ = x == *p }},
+		// TODO(mdempsky): Restore "nil pointer dereference" check. The Go
+		// spec doesn't mandate an order for panics (or even panic
+		// messages), but left-to-right is less confusing to users.
+		{"nil pointer dereference #2", "", func() { _ = *l == r[0] }},
+		{"nil pointer dereference #3", "", func() { _ = *l == any(r[0]) }},
+	}
+
+	for _, tc := range tests {
+		testFuncShouldPanic(tc.name, tc.errStr, tc.f)
+	}
+}
+
+func testFuncShouldPanic(name, want string, f func()) {
+	defer func() {
+		e := recover()
+		if e == nil {
+			log.Fatalf("%s: comparison did not panic\n", name)
+		}
+		if have := e.(error).Error(); !strings.Contains(have, want) {
+			log.Fatalf("%s: wrong panic message: have %q, want %q\n", name, have, want)
+		}
+	}()
+	f()
+}