co_await trashes lambda captures

windows 10.0 visual studio 2017 rc

Hamza Sood reported Dec 05, 2016 at 06:19 PM

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Hamza Sood · Dec 05, 2016 at 06:25 PM 0

Leo Zhang [MSFT] · Sep 07, 2017 at 02:34 AM 0

Solution by Gor Nishanov [MSFT] · Aug 25, 2017 at 05:37 PM

In this case, the operator() of lambda object outlives the lifetime of the lambda object that stores captured variables.

To make this code work, make your lambda stateless by avoiding capturing any variables and passing the desired values as arguments instead. Something like this:

int testNumber = 3; 
auto testBlock = [](auto testNumber) -> concurrency::task<void> { ... };
testBlock(testNumber);

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