Compiler crashes when emitting declaration for malformed interface

[HerringtonDarkholme]

TypeScript Version: nightly, with --declaration flag, also reproducable with stable version
Code

// @declaration
class A {}
interface Class extends (typeof A) {}

Expected behavior:
Report error like without --declaration flag.

Actual behavior:
Crashes with Cannot read property 'heritageClauses' of undefined in writeInterfaceDeclaration