Hi Adrian, the green dragon Incremental CI bot has been failing the past couple
of days after the changes for the coroutines formatter, most directly
https://reviews.llvm.org/D132815 landed - TestCoroutineHandle.py results in a
segfault on Darwin systems (both on the CI and on my mac desktop) consistently.
https://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake/
It's crashing in formatters::StdlibCoroutineHandleSyntheticFrontEnd where
you're doing
```
// Add the `promise` member. We intentionally add `promise` as a pointer type
// instead of a value type, and don't automatically dereference this pointer.
// We do so to avoid potential very deep recursion in case there is a cycle in
// formed between `std::coroutine_handle`s and their promises.
lldb::ValueObjectSP promise = CreateValueObjectFromAddress(
"promise", frame_ptr_addr + 2 * ptr_size, exe_ctx, promise_type);
Status error;
lldb::ValueObjectSP promisePtr = promise->AddressOf(error);
```
and the promise_type dose not have a CompilerType so promisePtr is nullptr and
we crash on the method call to AddressOf. I looked briefly, but this isn't a
part of lldb I know well and I'm not sure the nature of the problem.
It's a long weekend in the US, so if you have a suggestion for addressing this
that'd be great, or I can roll back the changes necessary to get the bot clean
later today and we can look at this next week.
Thanks!
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