http://bugzilla.novell.com/show_bug.cgi?id=517028
Summary: Strange LINQ Expression behaviour
Classification: Mono
Product: Mono: Runtime
Version: SVN
Platform: x86-64
OS/Version: Linux
Status: NEW
Severity: Normal
Priority: P5 - None
Component: misc
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Found By: ---
The simple code that follows shows two different problems detailed below.
using System;
using System.Linq.Expressions;
class Test
{
public static void Main()
{
int? i = 0;
Expression<Func<String>> e3 = Expression.Lambda<Func<String>>(
Expression.Convert(Expression.Constant(i), typeof(String),
typeof(Convert).GetMethod("ToString", new
Type[1] { typeof(int?) })));
Console.WriteLine("SHOULD NOT WHIS BE NULL? " +
typeof(Convert).GetMethod("ToString", new Type[1] { typeof(int?) }));
Console.WriteLine(e3.Compile()());
}
}
Problems:
While Convert does not have a ToString(Int32?) method, GetMethod returns a
method with ToString(Object) as signature instead of null.
The program fails during Compile() with a "System.InvalidProgramException:
Invalid IL code" exception.
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