1 files changed, 127 insertions, 0 deletions
diff --git a/test/fixedbugs/issue9370.go b/test/fixedbugs/issue9370.go
new file mode 100644
index 0000000..6cc8d5b
--- /dev/null
+++ b/test/fixedbugs/issue9370.go
@@ -0,0 +1,127 @@
+// errorcheck
+
+// Copyright 2014 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.
+
+// Verify that concrete/interface comparisons are
+// typechecked correctly by the compiler.
+
+package main
+
+type I interface {
+	Method()
+}
+
+type C int
+
+func (C) Method() {}
+
+type G func()
+
+func (G) Method() {}
+
+var (
+	e interface{}
+	i I
+	c C
+	n int
+	f func()
+	g G
+)
+
+var (
+	_ = e == c
+	_ = e != c
+	_ = e >= c // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = c == e
+	_ = c != e
+	_ = c >= e // ERROR "invalid operation.*not defined|invalid comparison"
+
+	_ = i == c
+	_ = i != c
+	_ = i >= c // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = c == i
+	_ = c != i
+	_ = c >= i // ERROR "invalid operation.*not defined|invalid comparison"
+
+	_ = e == n
+	_ = e != n
+	_ = e >= n // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = n == e
+	_ = n != e
+	_ = n >= e // ERROR "invalid operation.*not defined|invalid comparison"
+
+	// i and n are not assignable to each other
+	_ = i == n // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = i != n // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = i >= n // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = n == i // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = n != i // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = n >= i // ERROR "invalid operation.*mismatched types|incompatible types"
+
+	_ = e == 1
+	_ = e != 1
+	_ = e >= 1 // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = 1 == e
+	_ = 1 != e
+	_ = 1 >= e // ERROR "invalid operation.*not defined|invalid comparison"
+
+	_ = i == 1 // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = i != 1 // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = i >= 1 // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = 1 == i // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = 1 != i // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = 1 >= i // ERROR "invalid operation.*mismatched types|incompatible types"
+
+	_ = e == f // ERROR "invalid operation.*not defined|invalid operation"
+	_ = e != f // ERROR "invalid operation.*not defined|invalid operation"
+	_ = e >= f // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = f == e // ERROR "invalid operation.*not defined|invalid operation"
+	_ = f != e // ERROR "invalid operation.*not defined|invalid operation"
+	_ = f >= e // ERROR "invalid operation.*not defined|invalid comparison"
+
+	_ = i == f // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = i != f // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = i >= f // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = f == i // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = f != i // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = f >= i // ERROR "invalid operation.*mismatched types|incompatible types"
+
+	_ = e == g // ERROR "invalid operation.*not defined|invalid operation"
+	_ = e != g // ERROR "invalid operation.*not defined|invalid operation"
+	_ = e >= g // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = g == e // ERROR "invalid operation.*not defined|invalid operation"
+	_ = g != e // ERROR "invalid operation.*not defined|invalid operation"
+	_ = g >= e // ERROR "invalid operation.*not defined|invalid comparison"
+
+	_ = i == g // ERROR "invalid operation.*not defined|invalid operation"
+	_ = i != g // ERROR "invalid operation.*not defined|invalid operation"
+	_ = i >= g // ERROR "invalid operation.*not defined|invalid comparison"
+	_ = g == i // ERROR "invalid operation.*not defined|invalid operation"
+	_ = g != i // ERROR "invalid operation.*not defined|invalid operation"
+	_ = g >= i // ERROR "invalid operation.*not defined|invalid comparison"
+
+	_ = _ == e // ERROR "cannot use .*_.* as value"
+	_ = _ == i // ERROR "cannot use .*_.* as value"
+	_ = _ == c // ERROR "cannot use .*_.* as value"
+	_ = _ == n // ERROR "cannot use .*_.* as value"
+	_ = _ == f // ERROR "cannot use .*_.* as value"
+	_ = _ == g // ERROR "cannot use .*_.* as value"
+
+	_ = e == _ // ERROR "cannot use .*_.* as value"
+	_ = i == _ // ERROR "cannot use .*_.* as value"
+	_ = c == _ // ERROR "cannot use .*_.* as value"
+	_ = n == _ // ERROR "cannot use .*_.* as value"
+	_ = f == _ // ERROR "cannot use .*_.* as value"
+	_ = g == _ // ERROR "cannot use .*_.* as value"
+
+	_ = _ == _ // ERROR "cannot use .*_.* as value"
+
+	_ = e ^ c // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = c ^ e // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = 1 ^ e // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = e ^ 1 // ERROR "invalid operation.*mismatched types|incompatible types"
+	_ = 1 ^ c
+	_ = c ^ 1
+)