[Mono-bugs] [Bug 47822][Nor] New - Wrong IL code for unboxing struct from interface type

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Changed by sestoft@dina.kvl.dk.

http://bugzilla.ximian.com/show_bug.cgi?id=47822

--- shadow/47822	2003-08-22 10:01:43.000000000 -0400
+++ shadow/47822.tmp.16401	2003-08-22 10:01:43.000000000 -0400
@@ -0,0 +1,67 @@
+Bug#: 47822
+Product: Mono/MCS
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: sestoft@dina.kvl.dk               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Wrong IL code for unboxing struct from interface type
+
+Description of Problem:
+
+The C# compiler mcs 0.26 generates wrong bytecode for unboxing a struct
+from an interface type (I guess; the runtime correctly executes IL
+generated for this program by MS csc 1.2 alpha).
+
+Steps to reproduce the problem:
+1. Compile program below
+2. Run it; result should be 11, but is not
+
+using System;
+
+class MyTest {
+  public static void Main(String[] args) {
+    S s1 = new S(11);
+    I s2 = s1;                          // Implicit boxing S-->I
+    S s3 = (S)s2;                       // Explicit unboxing I-->S
+    s3.Print();                         // Should print 11, does not
+  }
+}
+
+interface I {
+  void Print();
+}
+
+struct S : I {
+  public int i;
+  public S(int i) { 
+    this.i = i;
+  }
+  public void Print() {
+    Console.WriteLine(i);
+  }
+}
+
+
+Actual Results:
+
+134729068
+
+Expected Results:
+
+11
+
+How often does this happen? 
+
+Always with mono 0.26
+
+Additional Information: