Spurious test out-of-stack test failure on Android

[aturon]

See https://gist.github.com/aturon/6c03914f968084548cd6 for an example. @alexcrichton dug into this and found strange behavior but wasn't able to make sense of it.

The test is going to be marked ignore on android for the time being.

[aturon]

@alexcrichton can you fill out the details here?

[alexcrichton]

The best that I could ever figure out here was that it may be some form of codegen bug, but I could never track it down. The failure mode here was that while panicking a debug_assert! was trigged in a RefCell borrow, causing everything to go downhill from there, eventually causing the oom handler to run.

I stepped through into the destructor of BorrowRefMut, but the self pointer was off by ~16 bytes. The memory of where I thought the RefCell resided looked totally ok, but the pointer inside of BorrowRefMut was way off.

I may have been just been tracing wrong, though. I also saw really weird things like strex failing in a single-threaded context whenever I used stepi in gdb, which I would not expect to happen!

[steveklabnik]

Triage: over a year later, no changes that I'm aware of, and this is still ignored on android.

[Mark-Simulacrum]

Filed #41618 to unignore the test and see how it goes. If you see this test fail, please either file a PR to revert mine (once it lands) or let me know and I'll do so.

[Mark-Simulacrum]

#41618 failed, this is not ready to be re-enabled.

[steveklabnik]

Triage: test still disabled https://github.com/rust-lang/rust/blob/master/src/test/run-pass/out-of-stack.rs#L3