[mcs] Await flow analysis uses resolved expression. Fixes #16840

diff --git a/mcs/mcs/async.cs b/mcs/mcs/async.cs
index ca39017696d7a61b6d2b9dc650e7ffb903ff78c6..10cc8c30b789421ddd87893d0afaa84bda8f7a99 100644 (file)
--- a/mcs/mcs/async.cs
+++ b/mcs/mcs/async.cs
@@ -67,7 +67,7 @@ namespace Mono.CSharp
 
                public override void FlowAnalysis (FlowAnalysisContext fc)
                {
-                       expr.FlowAnalysis (fc);
+                       stmt.Expr.FlowAnalysis (fc);
 
                        stmt.RegisterResumePoint ();
                }

diff --git a/mcs/tests/test-async-57.cs b/mcs/tests/test-async-57.cs
new file mode 100644 (file)
index 0000000..aa7e59e
--- /dev/null
+++ b/mcs/tests/test-async-57.cs
@@ -0,0 +1,16 @@
+using System.Threading.Tasks;
+using System;
+
+class X
+{
+       readonly Func<string, Task> action = null;
+
+       public static void Main ()
+       {
+       }
+
+       protected async Task TestAsync ()
+       {
+               await action ("");
+       }
+}
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