[Mono-bugs] [Bug 82528][Nor] New - Segfault when Type.IsInstanceOfType is used on result from float.Parse when invoked as a delegate returning Object.

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Changed by amcharg at gmail.com.

http://bugzilla.ximian.com/show_bug.cgi?id=82528

--- shadow/82528	2007-08-21 21:30:28.000000000 -0400
+++ shadow/82528.tmp.8859	2007-08-21 21:30:28.000000000 -0400
@@ -0,0 +1,82 @@
+Bug#: 82528
+Product: Mono: Class Libraries
+Version: 1.2
+OS: 
+OS Details: Gentoo amd64 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: System
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: amcharg at gmail.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Segfault when Type.IsInstanceOfType is used on result from float.Parse when invoked as a delegate returning Object.
+
+Description of Problem:
+
+Mono 1.2.4 seems behave improperly when float.Parse is invoked as a
+delegate returning an object.
+
+Steps to reproduce the problem:
+1. Compile the following code with gmcs 1.2.4.0:
+
+using System;
+
+delegate object ParseFun(string text);
+
+class MonoBug {
+  public static void Main() {
+    ParseFun fun = float.Parse;
+    object obj = fun("123.45");
+
+    if (typeof(float).IsInstanceOfType(obj))     
+      Console.WriteLine("Got a float: {0}", obj);
+  }
+}
+
+Actual Results:
+
+Segfault:
+
+Stacktrace:
+
+  at (wrapper managed-to-native) System.Type.IsInstanceOfType (object)
+<0x0000b>
+  at (wrapper managed-to-native) System.Type.IsInstanceOfType (object)
+<0xffffffff>
+  at MonoBug.Main () <0x00082>
+  at (wrapper runtime-invoke) System.Object.runtime_invoke_void
+(object,intptr,intptr,intptr) <0xffffffff>
+
+Native stacktrace:
+
+        mono [0x51a3d1]
+        mono [0x4e222d]
+        /lib/libpthread.so.0 [0x2b441f1def90]
+        mono(mono_object_isinst+0x64) [0x4968d4]
+        mono [0x49c138]
+        [0x4022c0c0]
+
+
+Expected Results:
+
+Should print "Got a float: 123.45"
+
+How often does this happen? 
+
+Every time.
+
+Additional Information:
+
+OS: Linux Gilead 2.6.21-gentoo-r4 #1 SMP Thu Aug 2 23:10:45 PDT 2007 x86_64
+AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ AuthenticAMD GNU/Linux
+
+gcc: x86_64-pc-linux-gnu-4.1.1 
+glibc: 2.5-r4 
+binutils:  2.17
+libtool:   1.5.24
+os-headers:  2.6.21