P2079R10 Parallel scheduler

Author: jensmaurer

source/exceptions.tex

@@ -1136,9 +1136,13 @@
 \tcode{scope.\exposid{state}} is not equal to
 \exposid{joined},
 \exposid{unused}, or
-\exposid{unused-and-closed}\iref{exec.simple.counting.ctor}.
-\end{itemize}
+\exposid{unused-and-closed}\iref{exec.simple.counting.ctor}, or
 
+\item%
+when \tcode{std::execution::get_parallel_scheduler} is called and
+\tcode{std::execution::system_context_replace\-ability::query_parallel_scheduler_backend()}
+returns a null pointer value\iref{exec.par.scheduler}.
+\end{itemize}
 \end{note}
 
 \pnum