Bug 15422 - MCS thinks that T[] cannot be byte[]
Summary: MCS thinks that T[] cannot be byte[]
Status: RESOLVED FIXED
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: unspecified
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Marek Safar
URL:
Depends on:
Blocks:
 
Reported: 2013-10-15 19:56 UTC by Brett van Swelm
Modified: 2013-10-16 14:23 UTC (History)
1 user (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Brett van Swelm 2013-10-15 19:56:06 UTC
With "D:\Applications\Mono-2.11.4\bin" and
"C:\Windows\Microsoft.NET\Framework\v4.0.30319" in the path on my Windows 7
machine:

===== Test.cs =====
public class Test
{
    static void testIsArrayGeneric<T>(T [] t)
    {
        if(t is byte[]) {
            System.Console.WriteLine("Reached");
            return;
        }
    }

    public static int Main()
    {
        testIsArrayGeneric<byte>(new byte[10]);
        return 0;
    }
}
===== end =====

$ csc Test.cs
Microsoft (R) Visual C# Compiler version 4.0.30319.17929
for Microsoft (R) .NET Framework 4.5
Copyright (C) Microsoft Corporation. All rights reserved.

$ ./Test.exe 
Reached

$ mcs Test.cs 
Test.cs(5,14): warning CS0184: The given expression is never of the provided (`byte[]') type
Test.cs(5,25): warning CS0162: Unreachable code detected
Compilation succeeded - 2 warning(s)

$ ./Test.exe 

Thanks,

Brett van Swelm | Senior Engineer
Coverity | 185 Berry Street | Suite 6500, Lobby 3 | San Francisco, CA 94107
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Comment 1 Marek Safar 2013-10-16 14:23:13 UTC
Fixed in master