syscall: fix infinite recursion in itoa
Fixes #8332.
LGTM=dvyukov
R=golang-codereviews, dvyukov
CC=golang-codereviews
https://golang.org/cl/138650044
diff --git a/src/syscall/syscall_test.go b/src/syscall/syscall_test.go
index 2a39b54..846c487 100644
--- a/src/syscall/syscall_test.go
+++ b/src/syscall/syscall_test.go
@@ -5,6 +5,7 @@
package syscall_test
import (
+ "fmt"
"syscall"
"testing"
)
@@ -28,3 +29,19 @@
// make sure TESTENV gets set to "", not deleted
testSetGetenv(t, "TESTENV", "")
}
+
+func TestItoa(t *testing.T) {
+ // Make most negative integer: 0x8000...
+ i := 1
+ for i<<1 != 0 {
+ i <<= 1
+ }
+ if i >= 0 {
+ t.Fatal("bad math")
+ }
+ s := syscall.Itoa(i)
+ f := fmt.Sprint(i)
+ if s != f {
+ t.Fatalf("itoa(%d) = %s, want %s", i, s, f)
+ }
+}
