Bug 20039 - Function returns random double when running step-by-step
Summary: Function returns random double when running step-by-step
Status: RESOLVED FIXED
Alias: None
Product: Xamarin Studio
Classification: Desktop
Component: Debugger ()
Version: 4.0.12
Hardware: PC Linux
: High normal
Target Milestone: master
Assignee: Jeffrey Stedfast
URL:
Depends on:
Blocks:
 
Reported: 2014-05-26 06:41 UTC by Derp
Modified: 2014-06-02 06:59 UTC (History)
2 users (show)

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


Attachments
Example code posted in description (379 bytes, application/octet-stream)
2014-05-26 06:41 UTC, Derp
Details


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Related Links:
Status:
RESOLVED FIXED

Description Derp 2014-05-26 06:41:02 UTC
Created attachment 6879 [details]
Example code posted in description

Description of Problem:
A function that returns a double value will return a non-correct value if the program is executed step-by-step.

Steps to reproduce the problem:

using System;
namespace DoubleBug{
	class MainClass{
		public static void Main(string[] args){
			Doubly doub = new Doubly(12345.0);
			double e = doub.getValue();
			Console.WriteLine("main() = " + e);
		}
	}

	class Doubly{
		double d;
		public Doubly(double val){
			d = val;
		}

		public double getValue(){
			Console.WriteLine ("getValue() = " + d);
			return d;
		}
	}
}

Compile, set breakpoint to "getValue()" and step through the lines.

Actual Results:
getValue() = 12345
main() = 2,25 (<= sometimes "6", "10,5" ...)

Expected Results:
getValue() = 12345
main() = 12345

How often does this happen? 
Every time I run this piece of code. It DOES NOT happen when the program runs on its own (no breakpoints and no step-by-step execution).

Additional Information:
=== MonoDevelop ===

Version 4.0.12
Runtime:
	Mono 3.2.8 (Debian 3.2.8+dfsg-4ubuntu1) (64-bit)
	GTK 2.24.23
	GTK# (2.12.0.0)

=== Build Information ===

Git revision:
Build date: 2014-01-08 14:59:33+0000
Comment 1 Jeffrey Stedfast 2014-05-28 10:45:45 UTC
Try upgrading your MonoDevelop and Mono runtime.

Works fine for me with the latest versions.

This is what I get:

getValue() = 12345
main() = 12345
Comment 2 Derp 2014-06-02 06:59:52 UTC
Seems to be fixed in:

=== MonoDevelop ===

Version 5.1
Installation UUID: 1891a8ec-965e-42e9-9e6a-0f685eb0fecd
Runtime:
	Mono 3.2.8 (Debian 3.2.8+dfsg-4ubuntu1) (64-bit)
	GTK+ 2.24.23 (Bluebird theme)

=== Build Information ===

00f06168ad8a2aeaf9aa79aa8a4d22deb824056e

...build from git-sources 1h ago.