NullReferenceException opening the GC stats view

[jaredpar]

I collected a trace using the following command to profile the VBCSCompiler proccess:

dotnet trace collect --profile gc-verbose --providers Microsoft-CodeAnalysis-General -p 42456

When I open the resulting trace in PerfView and double click the GCStats node I get a system beep. The log shows the following exception:

Exception Occurred: System.NullReferenceException: Object reference not set to an instance of an object.
   at Stats.GcStats.PrintEventCondemnedReasonsTable(TextWriter writer, TraceProcess stats, TraceLoadedDotNetRuntime runtime, Int32 start, Predicate`1 filter)
   at Stats.GcStats.ToHtml(TextWriter writer, TraceProcess stats, TraceLoadedDotNetRuntime runtime, String fileName, Boolean doServerGCReport)
   at Stats.ClrStats.ToHtml(TextWriter writer, List`1 perProc, String fileName, String title, ReportType type, Boolean justBody, Boolean doServerGCReport, RuntimeLoaderStatsData runtimeOpsStats, TraceLog traceLog)
   at PerfView.PerfViewGCStats.WriteHtmlBody(TraceLog dataFile, TextWriter writer, String fileName, TextWriter log)
   at PerfView.PerfViewHtmlReport.GenerateReportFile(StatusBar worker, TraceLog trace)
   at PerfView.PerfViewHtmlReport.<>c__DisplayClass16_1.<Open>b__0()
   at PerfView.StatusBar.<>c__DisplayClass22_0.<StartWork>b__0()
An exceptional condition occurred, see log for details.
Started: Opening GCStats
Completed: Opening GCStats   (Elapsed Time: 0.163 sec)
Exception Occurred: System.NullReferenceException: Object reference not set to an instance of an object.
   at Stats.GcStats.PrintEventCondemnedReasonsTable(TextWriter writer, TraceProcess stats, TraceLoadedDotNetRuntime runtime, Int32 start, Predicate`1 filter)
   at Stats.GcStats.ToHtml(TextWriter writer, TraceProcess stats, TraceLoadedDotNetRuntime runtime, String fileName, Boolean doServerGCReport)
   at Stats.ClrStats.ToHtml(TextWriter writer, List`1 perProc, String fileName, String title, ReportType type, Boolean justBody, Boolean doServerGCReport, RuntimeLoaderStatsData runtimeOpsStats, TraceLog traceLog)
   at PerfView.PerfViewGCStats.WriteHtmlBody(TraceLog dataFile, TextWriter writer, String fileName, TextWriter log)
   at PerfView.PerfViewHtmlReport.GenerateReportFile(StatusBar worker, TraceLog trace)
   at PerfView.PerfViewHtmlReport.<>c__DisplayClass16_1.<Open>b__0()
   at PerfView.StatusBar.<>c__DisplayClass22_0.<StartWork>b__0()

Will share the trace privately cause it's too big to attach. No PII so it can be shared freely.

[brianrob]

Please do. Glad to fix this one. Should be easy with the trace.