`nvexec::let_value` and friends don't appear to be persisting the function args
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
Research direction
Start at include/nvexec/stream/let_xxx.cuh around lines 117-118 and compare the lifetime handling with stdexec::let_value. Trace the successor operation to confirm whether the callable's arguments are discarded too early; done means the arguments remain available for the successor operation without breaking the CUDA stream scheduler.
Written by the indexing model from the issue text.
Description
The arguments to let_value's callable should be persisted for the duration of the successor operation. Here, it looks like the arguments are discarded after the callable returns the successor sender.
@senior-zero is there a reason why keeping the arguments around like stdexec::let_value does would be problematic for the CUDA stream scheduler?
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