What steps will reproduce the problem?
1. Run this Go source code:
package main
import
(
"fmt";
"json";
"os";
)
func main()
{
jsonData := make(map[string]interface{});
jsonData["foo"] = "bar";
jsonData["fail"] = nil;
err := json.Marshal(os.Stdout, jsonData);
if err != nil
{
fmt.Fprintf(os.Stderr, "Error while marshalling: %s\n", err);
os.Exit(1);
}
fmt.Printf("\n");
}
2. *OR* Run this source code:
package main
import
(
"fmt";
"json";
"os";
)
func main()
{
var jsonData interface{} = nil;
err := json.Marshal(os.Stdout, jsonData);
if err != nil
{
fmt.Fprintf(os.Stderr, "Error while marshalling: %s\n", err);
os.Exit(1);
}
fmt.Printf("\n");
}
What is the expected output? What do you see instead?
I would expect the first case to print
`{"foo":"bar","fail":null}`, but it gives an error: `Error
while
marshalling: json cannot encode value of type interface { }`
The second case should just print `null`, but it SEGSEGVs.
What is your $GOOS? $GOARCH?
darwin amd64
Which revision are you using? (hg identify)
c36376f7c054+ tip
Please provide any additional information below.
I originally reported this on the go-nuts mailing list:
http://groups.google.com/group/golang-
nuts/browse_thread/thread/4a7972add964dd7/feba4a6e90bcf1e0
I do have a patch for this, I will post it momentarily.
