Peter Nelson eff27f39d5 Kernel: Store previous thread state upon all transitions to Stopped (#1753) ...

We now store the previous thread state in m_stop_state for all
transitions to the Stopped state via Thread::set_state.

Fixes #1752 whereupon resuming a thread that was stopped with SIGTSTP,
the previous state of the thread is not remembered correctly, resulting
in m_stop_state == State::Invalid and the associated assertion fails.

2020-04-11 23:39:46 +02:00

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