Alexander Root

I need to get access to a Windows machine to debug the winbot failures. I will try to get access to one sometime this week - other than debugging that,...

> Huh, the windows failures are indeed odd -- and the error messages unhelpful. Indeed :') > Could it be an illegal instruction on those machines? That is quite possible...

.....That is super strange. I don't even know how to begin debugging that.

Thanks for taking the time to try to debug this! I suspect that this is an issue with `SpecificExpr`, which just grabs a reference. I think I know how to...

Actually, I am pretty confident I found the bug, I am just going to use the buildbots to confirm instead of waiting for LLVM to install on this old laptop

The only failure appears unrelated, so I am marking this as ready for review - note that this PR relies on #6900 , so if we end up reverting that,...

> Did you trace it all the way thru or just suspect it? I ran into this issue last year at some point, and it caused random crashes - once...

> I'll try that now. Thank you!

`v_intrin` and the Call intrinsic objects should now all statically fail if we use an Expr as an arg, and I confirmed that it does indeed catch the cases that...

> Nice work finding and fixing the dangling-reference stuff Thanks! > it didn't occur to me that you could insert is_lvalue... checks as a means of verification. Didn't occur to...