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The main loop assumes that the engine is busy, however the handling of the emError state sets engineBusy to false. This causes an assertion, that was added in c750929 via #26, to trigger, which leads in debug runs (-ea flag set) to a crashed Engine and a blocked TestEngineDriver. Additionaly the engineBusy flag is set to false even when the Engine is actually busy as the emError state is left to either emIdle or emTerminating. This commit 1) changes the assertion to not throw when in emError state and 2) corrects the setting of engineBusy to be false only when no ecTerminate / ecRecover command was handled. TODO: This basic fix leaves the Engine in a Thread.yield loop until a ecTerminate / ecRecover command is present. The polling of the commandQueue should be replaced with a blocking wait.
.. with blocking wait for the next command. Also restore the assertion that was changed in the previous commit as workaround.
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This PR fixes an assertion caused in emError handling that broke tests in the operator-dev branch.
It also fixes a wrongfully set
engineBusy = falseon termination/recover and replaces a Thread.yield loop with a blocking wait.See the commit messages for more info.