[Mono-bugs] [Bug 76914][Nor] New - gmcs v.1.1.10-1 in the mono-gmcs package crashes

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Changed by alexanro at pvv.org.

http://bugzilla.ximian.com/show_bug.cgi?id=76914

--- shadow/76914	2005-12-05 07:21:47.000000000 -0500
+++ shadow/76914.tmp.21702	2005-12-05 07:21:47.000000000 -0500
@@ -0,0 +1,176 @@
+Bug#: 76914
+Product: Mono: Compilers
+Version: 1.1
+OS: Debian Woody
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: C#
+AssignedTo: rharinath at novell.com                            
+ReportedBy: alexanro at pvv.org               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: gmcs v.1.1.10-1 in the mono-gmcs package crashes
+
+Please fill in this template when reporting a bug, unless you know what you
+are doing.
+Description of Problem:
+I got a very strange exception when compiling my sourcecode.
+
+Steps to reproduce the problem:
+1. Run this on the commandline:
+    gmcs Board.cs
+
+--- The output ---
+
+Exception caught by the compiler while compiling:
+   Block that caused the problem begin at: Board.cs(78,18):
+                     Block being compiled:
+[Board.cs(80,46):,Board.cs(82,13):]
+System.NullReferenceException: Object reference not set to an instance of
+an object
+
+Unhandled Exception: System.NullReferenceException: Object reference not
+set to an instance of an object
+in <0x00014> Mono.CSharp.EmptyCast:.ctor (Mono.CSharp.Expression child,
+System.Type return_type)
+in <0x0020e> Mono.CSharp.Convert:ExplicitConversionCore
+(Mono.CSharp.EmitContext ec, Mono.CSharp.Expression expr,
+ System.Type target_type, Location loc)
+in <0x00016> Mono.CSharp.Convert:ExplicitConversion
+(Mono.CSharp.EmitContext ec, Mono.CSharp.Expression expr, Sys
+tem.Type target_type, Location loc)
+in <0x00179> Mono.CSharp.Cast:ResolveRest (Mono.CSharp.EmitContext ec)
+in <0x0003c> Mono.CSharp.Cast:DoResolve (Mono.CSharp.EmitContext ec)
+in <0x000e3> Mono.CSharp.Expression:Resolve (Mono.CSharp.EmitContext ec,
+ResolveFlags flags)
+in <0x00012> Mono.CSharp.Expression:Resolve (Mono.CSharp.EmitContext ec)
+in <0x00164> Mono.CSharp.Return:Resolve (Mono.CSharp.EmitContext ec)
+in <0x001bd> Mono.CSharp.Block:Resolve (Mono.CSharp.EmitContext ec)
+in <0x001fe> Mono.CSharp.If:Resolve (Mono.CSharp.EmitContext ec)
+in <0x001bd> Mono.CSharp.Block:Resolve (Mono.CSharp.EmitContext ec)
+in <0x000a6> Mono.CSharp.Foreach+CollectionForeachStatement:Resolve
+(Mono.CSharp.EmitContext ec)
+in <0x0010c> Mono.CSharp.While:Resolve (Mono.CSharp.EmitContext ec)
+in <0x0026e> Mono.CSharp.Foreach+CollectionForeach:Resolve
+(Mono.CSharp.EmitContext ec)
+in <0x00257> Mono.CSharp.Foreach:Resolve (Mono.CSharp.EmitContext ec)
+in <0x001bd> Mono.CSharp.Block:Resolve (Mono.CSharp.EmitContext ec)
+in <0x001bd> Mono.CSharp.Block:Resolve (Mono.CSharp.EmitContext ec)
+in <0x00122> Mono.CSharp.EmitContext:ResolveTopBlock
+(Mono.CSharp.EmitContext anonymous_method_host, Mono.CSharp.
+ToplevelBlock block, Mono.CSharp.InternalParameters ip, IMethodData md,
+System.Boolean unreachable)
+
+shell returned 1     
+
+-- The source of Board.cs ---
+
+using System;
+using System.Collections;
+
+public class Position {
+
+    public int x;
+    public int y;
+
+    public Position(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public Position(Position p) {
+        this.x = p.x;
+        this.y = p.y;
+    }
+
+    public int ToX() {
+return x;
+    }
+
+    public int ToY() {
+return y;
+    }
+
+    public override string ToString() {
+return "pos: (" + x.ToString() + ", " + y.ToString() + ")";
+    }
+
+}
+
+public class Board {
+
+    private Hashtable board;
+    private int boardsize;
+
+    public enum Stone : int {
+None = 0,
+Empty = 1,
+Black = 2,
+White = 3
+    }
+
+    public int size {
+        get {
+            return boardsize;
+        }
+    }
+    public int width {
+        get {
+            return boardsize;
+        }
+    }
+    public int height {
+        get {
+            return boardsize;
+        }
+    }
+
+    public Board(int size) {
+boardsize = size;
+        board = new Hashtable();
+    }
+
+    public void Set(Position p, Stone s) {
+        board.Add(p, s);
+    }
+
+    public Stone Get(Position p) {
+        if (board.Contains(p)) {
+            return (Stone)board[p];
+        } else {
+            return Stone.None;
+        }
+    }
+
+    public Stone Get(int x, int y) {
+        foreach (Position p in board.Keys) {
+            if ((p.x == x) && (p.y == y)) {
+                return (Stone)p;
+            }
+        }
+        return Stone.None;
+    }
+
+    public string GetID() {
+        string s = "";
+        for (int y=0; y < height; y++) {
+            for (int x=0; x < width; x++) {
+                Stone stone = Get(x, y);
+                if (stone != NoStone) {
+                    s += ((int)stone).ToString();
+                }
+            }
+        }
+        return s;
+    }
+    
+    public static void Main() {
+        Board b = new Board(9);
+    }
+    
+}