Improve exception diagnostics for stdio client (#376) #292

Job	Run time
build (ubuntu-latest, Release)	2m 34s
build (windows-latest, Release)	6m 2s
build (macos-latest, Debug)	1m 34s
build (ubuntu-latest, Debug)	2m 28s
build (windows-latest, Debug)	5m 35s
build (macos-latest, Release)	1m 42s
publish-coverage	-1s
	19m 54s

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