Add exception filters to incremental analyzer (#11783)

src/Features/Core/Portable/Diagnostics/EngineV2/DiagnosticIncrementalAnalyzer.Executor.cs

@@ -146,6 +146,8 @@ public IEnumerable<DiagnosticData> ConvertToLocalDiagnostics(Document targetDocu
             /// </summary>
             public async Task<ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult>> ComputeDiagnosticsAsync(
                 CompilationWithAnalyzers analyzerDriverOpt, Project project, IEnumerable<StateSet> stateSets, CancellationToken cancellationToken)
+            {
+                try
                 {
                     var result = ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult>.Empty;
 
@@ -163,10 +165,17 @@ public IEnumerable<DiagnosticData> ConvertToLocalDiagnostics(Document targetDocu
                     // check whether there is IDE specific project diagnostic analyzer
                     return await MergeProjectDiagnosticAnalyzerDiagnosticsAsync(project, stateSets, analyzerDriverOpt?.Compilation, result, cancellationToken).ConfigureAwait(false);
                 }
+                catch (Exception e) when (FatalError.ReportUnlessCanceled(e))
+                {
+                    throw ExceptionUtilities.Unreachable;
+                }
+            }
 
             private async Task<ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult>> ComputeDiagnosticsAsync(
                 CompilationWithAnalyzers analyzerDriverOpt, Project project, IEnumerable<StateSet> stateSets,
                 ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult> existing, CancellationToken cancellationToken)
+            {
+                try
                 {
                     // PERF: check whether we can reduce number of analyzers we need to run.
                     //       this can happen since caller could have created the driver with different set of analyzers that are different
@@ -186,6 +195,11 @@ public IEnumerable<DiagnosticData> ConvertToLocalDiagnostics(Document targetDocu
                     // we couldn't reduce the set.
                     return await ComputeDiagnosticsAsync(analyzerDriverOpt, project, stateSets, cancellationToken).ConfigureAwait(false);
                 }
+                catch (Exception e) when (FatalError.ReportUnlessCanceled(e))
+                {
+                    throw ExceptionUtilities.Unreachable;
+                }
+            }
 
             private ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult> MergeExistingDiagnostics(
                 VersionStamp version, ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult> existing, ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult> result)
@@ -253,6 +267,8 @@ public IEnumerable<DiagnosticData> ConvertToLocalDiagnostics(Document targetDocu
 
             private async Task<ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult>> MergeProjectDiagnosticAnalyzerDiagnosticsAsync(
                 Project project, IEnumerable<StateSet> stateSets, Compilation compilationOpt, ImmutableDictionary<DiagnosticAnalyzer, AnalysisResult> result, CancellationToken cancellationToken)
+            {
+                try
                 {
                     // check whether there is IDE specific project diagnostic analyzer
                     var ideAnalyzers = stateSets.Select(s => s.Analyzer).Where(a => a is ProjectDiagnosticAnalyzer || a is DocumentDiagnosticAnalyzer).ToImmutableArrayOrEmpty();
@@ -298,6 +314,11 @@ public IEnumerable<DiagnosticData> ConvertToLocalDiagnostics(Document targetDocu
 
                     return result;
                 }
+                catch (Exception e) when (FatalError.ReportUnlessCanceled(e))
+                {
+                    throw ExceptionUtilities.Unreachable;
+                }
+            }
 
             private async Task<IEnumerable<Diagnostic>> ComputeProjectDiagnosticAnalyzerDiagnosticsAsync(
                 Project project, ProjectDiagnosticAnalyzer analyzer, Compilation compilationOpt, CancellationToken cancellationToken)