[Mono-bugs] [Bug 31816][Nor] New - mcs generates bogus code on using() statements with non-IDisposable objects

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Changed by vladimir@pobox.com.

http://bugzilla.ximian.com/show_bug.cgi?id=31816

--- shadow/31816	Sun Oct  6 00:31:16 2002
+++ shadow/31816.tmp.5176	Sun Oct  6 00:31:16 2002
@@ -0,0 +1,53 @@
+Bug#: 31816
+Product: Mono/MCS
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: vladimir@pobox.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: mcs generates bogus code on using() statements with non-IDisposable objects
+
+given:
+/** startcode **/
+using System;
+
+public class Driver {
+        public Driver () {
+                Console.WriteLine ("constructor");
+        }
+
+        public static void Main (string[] args) {
+                using (Driver d = new Driver ()) {
+                        Console.WriteLine ("using");
+                }
+        }
+}
+/** endcode */
+
+mcs compiles this without error.  Upon running with mint or mono, a
+NullReferenceException is generated (SEGV).  monodis reveals Main to be
+generated as follows:
+
+    // method line 2
+    .method public static
+           default void Main(string[] args)  cil managed
+    {
+        // Method begins at RVA 0x20fe
+        .entrypoint
+        // Code size 0 (0x0)
+        .maxstack 0
+        .locals init (
+                class Driver    V_0)
+    } // end of method default void Main(string[] args)
+
+(generating a method without any instructions should probably generate at
+least some sort of exception)