[Mono-bugs] [Bug 75350][Wis] New - CInt on an invalid string throws the wrong exception

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Wed Jun 22 08:46:42 EDT 2005

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Changed by sgroot at liacs.nl.


--- shadow/75350	2005-06-22 08:46:42.000000000 -0400
+++ shadow/75350.tmp.16376	2005-06-22 08:46:42.000000000 -0400
@@ -0,0 +1,58 @@
+Bug#: 75350
+Product: Mono: Class Libraries
+Version: 1.1
+OS Details: Windows XP Professional x64 Edition
+Status: NEW   
+Priority: Wishlist
+Component: VB Runtime
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: sgroot at liacs.nl               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: CInt on an invalid string throws the wrong exception
+Description of Problem:
+If Visual Basic .Net code uses CInt on a string value that is not a valid 
+number, Microsoft .Net will throw an InvalidCastException, but Mono will 
+throw a FormatException. This makes developing code targetting both 
+runtimes more difficult, since both exceptions must be handled if you 
+wish to recover.
+Steps to reproduce the problem:
+1. Create a vb file, named test.vb, with the following contents:
+Imports System
+Module Program
+  Public Sub Main()
+    Try
+      Dim x As Integer = Cint("x")
+    Catch ex As InvalidCastException
+      Console.WriteLine("This should happen")
+    Catch ex As FormatException
+      Console.WriteLine("But this happens")
+    End Try
+  End Sub
+End Module
+---END CODE---
+2. Compile it using the Microsoft VB.NET compiler, or using the mbas 
+compiler with 'mbas test.vb'.
+3. Run it with 'mono test.exe'
+Actual Results:
+The output of the test program when run under mono is "But this happens".
+Expected Results:
+The result should have been "This should happen", which it is in 
+Microsoft .Net.
+How often does this happen? 
+Additional Information:
+Using Mono 1.1.8

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