Bug 24031 - Mono System.IO.FileStream Error as compared to .NET
Summary: Mono System.IO.FileStream Error as compared to .NET
Status: RESOLVED FIXED
Alias: None
Product: Class Libraries
Classification: Mono
Component: General ()
Version: 3.4.0
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: João Matos
URL:
Depends on:
Blocks:
 
Reported: 2014-10-23 21:24 UTC by Jon Goldberger [MSFT]
Modified: 2016-02-23 16:23 UTC (History)
3 users (show)

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


Attachments
Test Project (9.52 KB, application/zip)
2014-10-23 21:24 UTC, Jon Goldberger [MSFT]
Details


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Status:
RESOLVED FIXED

Description Jon Goldberger [MSFT] 2014-10-23 21:24:02 UTC
Created attachment 8489 [details]
Test Project

## Description

Using Mono's System.IO.FileStream to copy a file results in a copy that does not match the source in Mono. Same code works properly in .NET

## Steps to reproduce

1. Open the attached console project in Xamarin Studio on the Mac. 
2. Run the project.

Expected result: MD5 file hash should match

Actual result: MD% file hashes do not match.

3. Open the same solution in Visual Studio and run the project

Expected result: MD5 file hash should match

Actual result: As expected. 


My version information:

Xamarin Studio:

=== Xamarin Studio ===

Version 5.5.2 (build 3)
Installation UUID: 2dc9022f-f9a8-424f-8284-bf224cbbfde0
Runtime:
	Mono 3.10.0 ((detached/e204655)
	GTK+ 2.24.23 (Raleigh theme)

	Package version: 310000023

=== Xamarin.Android ===

Version: 4.18.0 (Business Edition)
Android SDK: /Users/apple/Library/Developer/Xamarin/android-sdk-mac_x86
	Supported Android versions:
		2.2    (API level 8)
		2.3    (API level 10)
		3.0    (API level 11)
		3.1    (API level 12)
		3.2    (API level 13)
		4.0    (API level 14)
		4.0.3  (API level 15)
		4.1    (API level 16)
		4.2    (API level 17)
		4.3    (API level 18)
		4.4    (API level 19)
		4.4.87 (API level 20)
Java SDK: /usr
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-466.1-11M4716)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-466.1, mixed mode)

=== Apple Developer Tools ===

Xcode 6.1 (6604)
Build 6A1052d

=== Xamarin.iOS ===

Version: 8.4.0.14 (Business Edition)
Hash: 1d464a1
Branch: 
Build date: 2014-10-17 21:50:07-0400

=== Xamarin.Mac ===

Version: 1.10.0.18 (Business Edition)

=== Build Information ===

Release ID: 505020003
Git revision: 6d4c806e383ba366b15fbccca9ddc1ba94f8d5ad
Build date: 2014-10-15 15:00:36-04
Xamarin addins: 069ddd29bb70a42238142eee9bac21a5e4b2f9f9

=== Operating System ===

Mac OS X 10.10.0
Darwin Jonathans-MacBook-Pro.local 14.0.0 Darwin Kernel Version 14.0.0
    Fri Sep 19 00:26:44 PDT 2014
    root:xnu-2782.1.97~2/RELEASE_X86_64 x86_64

------------------------------------
Visual Studio:

Microsoft Visual Studio Ultimate 2013
Version 12.0.30723.00 Update 3
Microsoft .NET Framework
Version 4.5.51641

Installed Version: Ultimate

Architecture and Modeling Tools   06181-004-0451031-02209
Microsoft Architecture and Modeling Tools
    
UML® and Unified Modeling Language™ are trademarks or registered trademarks of the Object Management Group, Inc. in the United States and other countries.

LightSwitch for Visual Studio 2013   06181-004-0451031-02209
Microsoft LightSwitch for Visual Studio 2013

Team Explorer for Visual Studio 2013   06181-004-0451031-02209
Microsoft Team Explorer for Visual Studio 2013

Visual Basic 2013   06181-004-0451031-02209
Microsoft Visual Basic 2013

Visual C# 2013   06181-004-0451031-02209
Microsoft Visual C# 2013

Visual C++ 2013   06181-004-0451031-02209
Microsoft Visual C++ 2013

Visual F# 2013   06181-004-0451031-02209
Microsoft Visual F# 2013

Visual Studio 2013 Code Analysis Spell Checker   06181-004-0451031-02209
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker

Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.

The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

Windows Phone SDK 8.0 - ENU   06181-004-0451031-02209
Windows Phone SDK 8.0 - ENU

Application Insights Tools for Visual Studio Package   1.0
Application Insights Tools for Visual Studio

ASP.NET and Web Tools   12.3.50717.0
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Editor extensions for HTML, CSS, and JavaScript
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Microsoft Azure Websites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Microsoft Azure

ASP.NET Web Frameworks and Tools 2012.2   4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563

ASP.NET Web Frameworks and Tools 2013   5.2.20703.0
For additional information, visit http://www.asp.net/

Common Azure Tools   1.2
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Microsoft Advertising SDK for Windows Phone   
Microsoft Advertising SDK for Windows Phone
Build 

Microsoft Azure Mobile Services Tools   1.2
Microsoft Azure Mobile Services Tools

Microsoft Azure Tools   2.4
Microsoft Azure Tools for Microsoft Visual Studio 2013 - v2.4.20730.1601

NuGet Package Manager   2.8.50313.46
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.

Office Developer Tools for Visual Studio 2013 ENU   12.0.30626
Microsoft Office Developer Tools for Visual Studio 2013 ENU

PowerShell Tools   1.2
Provides file classification services using PowerShell

PreEmptive Analytics Visualizer   1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.

SAPReferenceManager   1.0
Manages References to Shared Projects

SQL Server Data Tools   12.0.40706.0
Microsoft SQL Server Data Tools

Windows Azure Tools   2.3
Windows Azure Tools for Microsoft Visual Studio 2013 - v2.3.20320.1602

Windows Phone 8.1 SDK Integration   1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.

Workflow Manager Tools 1.0   1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.

Xamarin   3.7.230.0 (e78d10d6993f95fc3ebe791aeb4aacff165bf8bb)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android   4.18.0.39 (0ef616ae42005ece52f6df7aa1e093ceb11998f8)
Visual Studio plugin to enable development for Xamarin.Android.

Xamarin.iOS   8.4.0.0 (209abebbd8f1a292d042420edb45fa5fbd3f017b)
Visual Studio extension to enable development for Xamarin.iOS.
Comment 2 João Matos 2014-12-16 14:37:57 UTC
triton-mac:class triton$ mcs file.cs && mono file.exe
Hash not matched!
Source length:10485760 byte.
Dest length:15720448 byte.

Confirmed.
Comment 3 João Matos 2016-02-23 16:23:37 UTC
This is working for me with recent Mono.

➜  mono git:(master) ✗ mono/mini/mono-sgen Program.exe
Hash matched!
Source length:10485760 byte.
Dest length:10485760 byte.

➜  mono git:(master) ✗ mono --version
Mono JIT compiler version 4.2.1 (explicit/6dd2d0d Fri Nov  6 12:25:19 EST 2015)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           normal
	SIGSEGV:       altstack
	Notification:  kqueue
	Architecture:  x86
	Disabled:      none
	Misc:          softdebug 
	LLVM:          yes(3.6.0svn-mono-(detached/a173357)
	GC:            sgen

Please re-open if still able to reproduce.