Object reference not set to an instance of an object. about entityframeworkcore.cacheable HOT 4 OPEN

I can confirm, trying this library today, in my first test case .Cachable(TimeSpan.FromMinutes(120)).ToListAsync() and the second run of always hit this exception. What I noticed is if I stepped through it slowly it worked, but if I left my breaks out, I'd hit the above every time, which made it seem to me almost like a race condition was occurring, where cache wasn't populated prior to second run.

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My environment is asp.net core 2.2. I ran your unit test, no problem.But in the ASP.net core environment, inexplicable error.
I tried to track the source code, but when cacheResult returned, I reported that the pointer was abnormal.
It took four or five hours and hopefully it will solve the problem. It is a pity that I have not been able to solve this problem successfully, but I can only mention issue. I hope you can take the time to solve this problem.

Simple query, basically will not get an error. If the group by and then select such an operation is involved, it is easy to get an error.
The driver I use for EFCore is Promelo.EntityFrameworkCore.MySql this library. I don't know if this will have an impact, I'm not familiar with the Expression of Linq. The part that involves CustonQuery, a lot of it can not be read.
I'm in Tim issue through the Bing dictionary, and I hope you can read it.
Thank you

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I wrote a demo that recreated the error.
url： https://share.weiyun.com/5Q84ftF （pass：Y9ST）
I uploaded it to the net disk, and this address and password can be downloaded.

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Same issue. Working only with ToList sync version.

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