Bug 7937 - Incorrect casts from unsigned int
Summary: Incorrect casts from unsigned int
Status: RESOLVED DUPLICATE of bug 7938
Alias: None
Product: Runtime
Classification: Mono
Component: General (show other bugs)
Version: unspecified
Hardware: Other Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2012-10-23 05:29 UTC by Thomas Klose
Modified: 2017-08-28 15:05 UTC (History)
4 users (show)

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


Description Thomas Klose 2012-10-23 05:29:02 UTC
Casts from unsigned integer to double result in incorrect values.

Steps to reproduce: Start Mono shell (csharp).

  pi@raspberrypi ~ $ csharp 
  Mono C# Shell, type "help;" for help
  Enter statements below.
  csharp> uint u = 10;
  csharp> double d = u;
  csharp> d;
  csharp> double d = (double)u;
  csharp> d;                    
  csharp> u;

(the same occurs in actual (compiled) csharp programs.)

Actual results: unsigned integer 10 is castet to a negative double value

Expected results: unsigned interger 10 should be castet to double value 10.0

  Hardware platform: ARM (RaspberryPi)
  Mono Version: (Debian  in Raspbian (Wheezy)
  Linux kernel: Linux raspberrypi 3.2.27+ #160 PREEMPT Mon Sep 17 23:18:42 BST 2012 armv6l GNU/Linux

Does not occur on other hardware platforms (x86, x86-64) with same Mono version
Comment 1 Zoltan Varga 2012-10-23 20:51:28 UTC
I can't reproduce this using mono master, whats the output of mono --version ?
Comment 2 Thomas Klose 2012-11-05 09:31:03 UTC
pi@raspberrypi ~ $ mono --version
Mono JIT compiler version (Debian
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       normal
	Notifications: epoll
	Architecture:  armel,vfp
	Disabled:      none
	Misc:          softdebug 
	LLVM:          supported, not enabled.
	GC:            Included Boehm (with typed GC and Parallel Mark)
Comment 3 Zoltan Varga 2012-11-07 00:22:21 UTC
Probably a dup of 
Comment 4 Thomas Klose 2012-11-07 05:14:18 UTC
Yes, it seems so. The problem does not occur on Debian Wheezy with softfp.
Comment 5 Zoltan Varga 2012-11-07 11:08:04 UTC

*** This bug has been marked as a duplicate of bug 7938 ***

Notice (2018-05-21): bugzilla.xamarin.com will be switching to read-only mode on Thursday, 2018-05-25 22:00 UTC.

Please join us on Visual Studio Developer Community and GitHub to continue tracking issues. Bugzilla will remain available for reference in read-only mode. We will continue to work on open Bugzilla bugs and copy them to the new locations as needed for follow-up. The See Also field on each Bugzilla bug will be updated with a link to its new location when applicable.

After Bugzilla is read-only, if you have new information to add for a bug that does not yet have a matching issue on Developer Community or GitHub, you can create a follow-up issue in the new location. Copy and paste the title and description from this bug, and then add your new details. You can get a pre-formatted version of the title and description here:

In special cases you might also want the comments:

Our sincere thanks to everyone who has contributed on this bug tracker over the years. Thanks also for your understanding as we make these adjustments and improvements for the future.

Note You need to log in before you can comment on or make changes to this bug.