TypeError: super: no constructor when prototype.constructor deleted

[mhofman]

Build environment: Linux
Target device: XS Test Engine

Description
When removing the constructor property from the prototype of a derived class, XS can no longer construct instances of that class.

Steps to Reproduce

class Foo {}
class Bar extends Foo {}
delete Bar.prototype.constructor;
new Bar(); 

Expected behavior
No error

What happened

TypeError: Bar: super: no constructor

Other information
I'm not sure if a test262 exists for this, but I've verified v8, SM and JSC allow this, and AFAIK this is permitted by the spec.

[phoddie]

I won't ask why anyone would want to do that. ;) We'll take a look. Thank you!