fix(cuda.core): surface real CUDA error in Device.set_current() - #2461
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fix(cuda.core): surface real CUDA error in Device.set_current()#2461juenglin wants to merge 1 commit into
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closes #2460
Device.set_current() raised a misleading ValueError ("Cannot set NULL
context as current") when cuDevicePrimaryCtxRetain failed, discarding
the actual driver error code and leaving the thread-local error state
polluted.
Replace with HANDLE_RETURN(get_last_error()) to raise CUDAError with
the real driver status, matching the established pattern used elsewhere.
Manually verified by patching get_primary_context to return a failure;
a regression test is not practical because the failure requires
exclusive compute mode (unavailable on WDDM) or hardware error states
that cannot be simulated from Python.