codesign crashes since XCode 6.3/OS X 10.10.3

[Hendrik Schreiber]

> 
> The same line worked just fine before the upgrade to XCode 6.3/ OS X 10.10.3.
> Does anybody else have this problem (and perhaps a solution)?

Or asked the other way around:

Has anybody succeeded signing an app with a bundled JDK 1.8.0_40?
Just trying to figure out whether it’s me doing something stupid or codesign is simply broken.

Thanks,

-hendrik