Uncatchable haxe.macro.Context.typeof() when dealing with TExtend

4.0.5

```haxe
// Main.hx
class Main {
static function main()
Macro.run();
}

typedef Obj1 = {foo:Int}
typedef Obj2 = {foo:String}

// Macro.hx
import haxe.macro.Expr;
import haxe.macro.Context;

class Macro {
public static macro function run() {
try {
var ct = TExtend([
{pack: [], name: 'Main', params: [], sub: 'Obj1'},
{pack: [], name: 'Main', params: [], sub: 'Obj2'},
], []);
Context.typeof(macro {
var v:$ct = null;
v;
});
} catch(e:Dynamic) {
trace(e);
}

return macro null;
}
}
```

Compiler halts with `Cannot redefine field foo with different type` and the error is uncatchable