Fix error deserialization bug #2783

Job	Run time
macOS--dotnet6-and-mono	4m 56s
windows--legacyFramework-only	14m 50s
macOS--mono-only	5m 37s
macOS--dotnet6-only	4m 55s
linux22-github--dotnet-and-mono	4m 17s
linux22-github--dotnet-and-newmono	4m 31s
linux22-vanilla--stockdotnet6-and-newmono	8m 6s
linux22-vanilla--stockdotnet6-only	5m 38s
windows--dotnet6-and-legacyFramework	8m 39s
linux22-vanilla--stockmono-only	5m 50s
windows--dotnet6-only	8m 18s
linux20-github--dotnet-and-mono	4m 37s
linux20-github--dotnet-and-newmono	4m 14s
linux20-vanilla--newmono-only	7m 21s
linux20-vanilla--stockmono-only	8m 0s
linux22-vanilla--newmono-only	8m 2s
linux22-vanilla--stockdotnet6-and-stockmono	5m 38s
conventions	1m 38s
snap_pkg	1m 28s
	1h 56m 35s

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