Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

cmd/compile: fix ordering problems in struct equality

Browse source 
Make sure that if a field comparison might panic, we evaluate
(and short circuit if not equal) all previous fields, and don't
evaluate any subsequent fields.

Add a bunch more tests to the equality+panic checker.

Update #8606

Change-Id: I6a159bbc8da5b2b7ee835c0cd1fc565575b58c46
Reviewed-on: https://go-review.googlesource.com/c/go/+/237919
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Keith Randall 2020-06-15 09:17:18 -07:00
parent 8a33a8c652
commit 8c8045fd38
2 changed files with 101 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

59
test/fixedbugs/issue8606.go
View file

@ -12,22 +12,65 @@ import "fmt"
func main() {
type A [2]interface{}
type A2 [6]interface{}
type S struct{ x, y interface{} }
type S2 struct{ x, y, z, a, b, c interface{} }
type T1 struct {
i interface{}
a int64
j interface{}
}
type T2 struct {
i interface{}
a, b, c int64
j interface{}
}
type T3 struct {
i interface{}
s string
j interface{}
}
b := []byte{1}
for _, test := range []struct {
panic bool
a, b interface{}
}{
{false, A{1, []byte{1}}, A{2, []byte{1}}},
{true, A{[]byte{1}, 1}, A{[]byte{1}, 2}},
{false, S{1, []byte{1}}, S{2, []byte{1}}},
{true, S{[]byte{1}, 1}, S{[]byte{1}, 2}},
{false, A{1, []byte{1}}, A{"2", []byte{1}}},
{true, A{[]byte{1}, 1}, A{[]byte{1}, "2"}},
{false, S{1, []byte{1}}, S{"2", []byte{1}}},
{true, S{[]byte{1}, 1}, S{[]byte{1}, "2"}},
{false, A{1, b}, A{2, b}},
{true, A{b, 1}, A{b, 2}},
{false, A{1, b}, A{"2", b}},
{true, A{b, 1}, A{b, "2"}},
{false, A2{1, b}, A2{2, b}},
{true, A2{b, 1}, A2{b, 2}},
{false, A2{1, b}, A2{"2", b}},
{true, A2{b, 1}, A2{b, "2"}},
{false, S{1, b}, S{2, b}},
{true, S{b, 1}, S{b, 2}},
{false, S{1, b}, S{"2", b}},
{true, S{b, 1}, S{b, "2"}},
{false, S2{x: 1, y: b}, S2{x: 2, y: b}},
{true, S2{x: b, y: 1}, S2{x: b, y: 2}},
{false, S2{x: 1, y: b}, S2{x: "2", y: b}},
{true, S2{x: b, y: 1}, S2{x: b, y: "2"}},
{true, T1{i: b, a: 1}, T1{i: b, a: 2}},
{false, T1{a: 1, j: b}, T1{a: 2, j: b}},
{true, T2{i: b, a: 1}, T2{i: b, a: 2}},
{false, T2{a: 1, j: b}, T2{a: 2, j: b}},
{true, T3{i: b, s: "foo"}, T3{i: b, s: "bar"}},
{false, T3{s: "foo", j: b}, T3{s: "bar", j: b}},
{true, T3{i: b, s: "fooz"}, T3{i: b, s: "bar"}},
{false, T3{s: "fooz", j: b}, T3{s: "bar", j: b}},
} {
f := func() {
defer func() {
if recover() != nil {
panic(fmt.Sprintf("comparing %#v and %#v panicked", test.a, test.b))
}
}()
if test.a == test.b {
panic(fmt.Sprintf("values %#v and %#v should not be equal", test.a, test.b))
}