CUDA Thrust in CUDA V11.0 Runtime Check #3 exception on debug compilation

[ghost]

The bug only occurs during debug compilation of the code using Visual Studio 16.7.3.

The bug is a result of unallocated variables in the header.

I think this is an issue with VS2019 and CUDA 11 the stack overflow link below describes what I'm seeing.

https://stackoverflow.com/questions/63888117/unable-to-create-a-thrust-device-vector

If you try to compile my example using CUDA 11, VS 16.7.3 and with x64 debug profile you'll get the error. I'm trying to help you improve your product please be patient...

The compilation results in C4700 warnings origination from the thrust device vector headers.
See the following link for a description:
https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-and-level-4-c4700?view=vs-2019

[alliepiper]

Can you share the exact error message you're seeing?

[ghost]

It's says: Run-time Check Failure #3 - The variable 'result' is being used without being initialized

[alliepiper]

MSVC C4700 is a compile time warning. What does the compiler print out? Is there a filename, line number, etc?

This sounds like a duplicate of a recently fixed issue (Refs #1206 #1009) that will be available in CUDA 11.2. It's a small patch to the thrust headers (see #1009) if you want to try fixing it locally and see if that addresses it.

[ghost]

Yeah that is the problematic file. Feel free to mark this as a duplicate issue. Any idea when CUDA 11.2 will released?

[alliepiper]

Cool, I'll go ahead and close this one as a duplicate of the above mentioned issues/PRs.

There's not a release date for 11.2 yet, but it'll be a little while since 11.1 is not yet available. The current version in our main github branch has quite a few MSVC fixes, so if you're targeting windows it may be worth switching to that for a while instead of the Thrust that's bundled with the CUDA toolkit.