[Mono-bugs] [Bug 42390][Nor] New - mcs crashes on foreach statement

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Changed by arch.robison@intel.com.

http://bugzilla.ximian.com/show_bug.cgi?id=42390

--- shadow/42390	Mon May  5 16:26:18 2003
+++ shadow/42390.tmp.22059	Mon May  5 16:26:18 2003
@@ -0,0 +1,91 @@
+Bug#: 42390
+Product: Mono/MCS
+Version: unspecified
+OS: Red Hat 7.2
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: arch.robison@intel.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: mcs crashes on foreach statement
+
+Please fill in this template when reporting a bug, unless you know what 
+you are doing.
+Description of Problem:
+mcs dies with an unhandled exception when compiling a foreach statement 
+where the IEnumerable is implemented by a struct.
+
+Steps to reproduce the problem:
+1. Save the following program to a file gorilla.cs:
+using System.Collections;
+
+public class Gorilla {
+
+        public struct Tree: IEnumerable {
+                struct Enumerator: IEnumerator {
+                        public bool MoveNext() {
+                                return false;
+                        }
+                        public object Current {
+                                get {return null;}
+                        }
+                        public void Reset() {
+                        }
+                }
+
+                public IEnumerator GetEnumerator() {
+                        return new Enumerator();
+                }
+        }
+
+        public static void Main() {
+                foreach( int j in new Tree() ) {
+                }
+        }
+}
+2. Compile with "mcs gorilla.cs"
+
+Actual Results:
+Compilation dies with this message:
+Exception caught by the compiler while compiling:
+   Block that caused the problem begin at: gorilla.cs: (22)
+                     Block being compiled: [Internal: (1),Internal: (1)]
+
+Unhandled Exception: System.Exception: Expr Mono.CSharp.New of type 
+Gorilla+Tree does not implement IMemoryLocation
+in <0x001ad> 00 Mono.CSharp.Foreach:EmitCollectionForeach 
+(Mono.CSharp.EmitContext)
+in <0x000fe> 00 Mono.CSharp.Foreach:DoEmit (Mono.CSharp.EmitContext)
+in <0x00045> 00 Mono.CSharp.Statement:Emit (Mono.CSharp.EmitContext)
+in <0x000ac> 00 Mono.CSharp.Block:DoEmit (Mono.CSharp.EmitContext)
+in <0x00065> 00 Mono.CSharp.Block:Emit (Mono.CSharp.EmitContext)
+in <0x000ac> 00 Mono.CSharp.Block:DoEmit (Mono.CSharp.EmitContext)
+in <0x00065> 00 Mono.CSharp.Block:Emit (Mono.CSharp.EmitContext)
+in <0x001bc> 00 Mono.CSharp.EmitContext:EmitTopBlock 
+(Mono.CSharp.Block,Mono.CSharp.InternalParameters,Mono.CSharp.Location)
+in <0x00357> 00 Mono.CSharp.EmitContext:EmitTopBlock 
+(Mono.CSharp.Block,Mono.CSharp.InternalParameters,Mono.CSharp.Location)
+in <0x0053a> 00 Mono.CSharp.MethodData:Emit 
+(Mono.CSharp.TypeContainer,Mono.CSharp.Block,object)
+in <0x00023> 00 Mono.CSharp.Method:Emit (Mono.CSharp.TypeContainer)
+in <0x00297> 00 Mono.CSharp.TypeContainer:Emit ()
+in <0x004c8> 00 Mono.CSharp.RootContext:EmitCode ()
+in <0x0075d> 00 Mono.CSharp.Driver:MainDriver (string[])
+in <0x0000f> 00 Mono.CSharp.Driver:Main (string[])
+
+
+
+Expected Results:
+Successful compilation.
+
+How often does this happen? 
+Every time.
+
+Additional Information: