Hinge angle limits bug?

[JoeJ]

Hi,

i've got confused while setting hinge angle limits using 2.77.

This is setup line:
((btHingeConstraint*)joint)->setLimit (0, -3.14*0.5);

Should form a 90deg angle.
Look at the screenshots, the white visualisation is my own, and the tiny black one is bullet build in.
The black one does not form 90deg angle, and also the behaviour of the bodys differs from both visualisations, it does not seem to be a flipping problem.

I've also proofed with debugger at constraint creation:
Orientation parts of all 4 given matrices (body->collObject->worldTransform & constraint constructor) are identity.

What else could i've done wrong?