JOB_STACKFRAME_THROW

JOB_STACKFRAME_THROW stackframes in context will look as follows:

  job_RunState.l   ->   size in bytes of below stackframe
                        JOB_STACKFRAME_THROW
                        tag being 'thrown'.
                        size in bytes of above stackframe

                        size in bytes of below stackframe
                        JOB_STACKFRAME_NORMAL   
                        local_variable_N
			...
			local_variable_1
  job_RunState.v   ->	local_variable_0
                        compiledFunction for this frame.
                        programCounter for this frame.
                        size in bytes of above stackframe

This stackframe is pushed when we are actually executing }ALWAYS_DO{ ... } code -- we've halted some sort of throw operation midway in order to execute our }ALWAYS_DO{ clause, and must resume the throw as soon as the }ALWAYS_DO{ clause completes.

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