Avoid an exception in Exception.GetCaptureState() if the stack trace …

…is empty, it can happen on wasm+aot. (dotnet#46539)
nattress · Jan 5, 2021 · 4c13a9d · 4c13a9d
1 parent 6e111ea
commit 4c13a9d
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/mono/netcore/System.Private.CoreLib/src/System/Exception.Mono.cs b/src/mono/netcore/System.Private.CoreLib/src/System/Exception.Mono.cs
@@ -75,7 +75,8 @@ internal DispatchState CaptureDispatchState()
             if (_traceIPs != null)
             {
                 stackFrames = Diagnostics.StackTrace.get_trace(this, 0, true);
-                stackFrames[stackFrames.Length - 1].isLastFrameFromForeignException = true;
+                if (stackFrames.Length > 0)
+                    stackFrames[stackFrames.Length - 1].isLastFrameFromForeignException = true;
 
                 if (foreignExceptionsFrames != null)
                 {