Dave Lee 696f9706f3 [lldb] Set result error state in 'frame variable'
Ensure that errors in `frame variable` are reflected in result object.

The statistics for `frame variable` show invocations as being successful, even
when executing one of the error paths.

This change replaces `result.GetErrorStream()` with `result.AppendError()`,
which also sets the status to `eReturnStatusFailed`.

Differential Revision: https://reviews.llvm.org/D116788

Recommitting after D116901 and D116863.

(cherry picked from commit 2c7d10c41278181e3e45c68f28b501cd95193a8a)
2022-01-15 14:20:12 -08:00
..
2022-01-10 11:48:16 -08:00