Wasmtime trap tests failing on most recent nightlly

[alexcrichton]

The currenty nightly fails to run tests on Linux with this command:

$ cargo +nightly test -p wasmtime --test traps stack_overflow

I've bisected this to rust-lang/rust#70362, but don't know why that's the cause yet. Wanted to open an issue in case anyone else runs into this!

[alexcrichton]

Ok I think this is just bland stack overflow. That PR is "at fault" because it shifts things around in terms of the implementation, so the debug mode stack required is probably larger. I think #1315 will be needed to fix this.

[alexcrichton]

Fixed in #1315