[BUG] wp.kernel functions crash if return value exist - but no compile time error/warning is given

[alex77g2]

Bug Description

@wp.kernel def f1(x: wp.vec4ui) -> wp.vec4ui: return x
Warp 1.10.1 initialized: CUDA Toolkit 12.8, Driver 13.0
is crashing at launch AttributeError: 'tuple' object has no attribute 'ctype'
There is no warning or error at complie time (wp.kernel -> llvm).
This creates useless frustration for beginners.
Please try to handle this in a better way and also mention this in documentation.

System Information

Warp 1.10.1 initialized: CUDA Toolkit 12.8, Driver 13.0
Windows 10, Python 3.13.9

[alex77g2]

short: this runtime error should be an interpreter/compiler error or warning (as it seems easy detectable)

[c0d1f1ed]

Fixed by f07a7c9