Bug 28297 - NullReferenceException in GreatestCommonDivisor
Summary: NullReferenceException in GreatestCommonDivisor
Alias: None
Product: Class Libraries
Classification: Mono
Component: System ()
Version: 3.12.0
Hardware: PC Windows
: --- normal
Target Milestone: Untriaged
Assignee: Marek Safar
Depends on:
Reported: 2015-03-21 19:26 UTC by donsyme
Modified: 2015-03-25 10:32 UTC (History)
2 users (show)

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

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Description donsyme 2015-03-21 19:26:01 UTC
The F# CI tests show a bug in the following code for GreatestCommonDivisor. These are new tests recently added by the Visual F# Tools team.

let bigPositiveA = 12345678901234567890I
let bigPositiveB = 98765432109876543210I

Assert.AreEqual(BigInteger.GreatestCommonDivisor(bigPositiveA, bigPositiveB), 900000000090I)
Assert.AreEqual(BigInteger.GreatestCommonDivisor(bigNegativeA, bigNegativeB), 900000000090I)
Assert.AreEqual(BigInteger.GreatestCommonDivisor(0I, bigPositiveA), bigPositiveA)

Errors and Failures:
1) Test Error : FSharp.Core.Unittests.FSharp_Core.Microsoft_FSharp_Math.BigIntType.GreatestCommonDivisor
   System.NullReferenceException : Object reference not set to an instance of an object
  at System.Numerics.BigInteger.GreatestCommonDivisor (BigInteger left, BigInteger right) [0x00000] in <filename unknown>:0 
  at FSharp.Core.Unittests.FSharp_Core.Microsoft_FSharp_Math.BigIntType.GreatestCommonDivisor () [0x00000] in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 

Full log here: https://s3.amazonaws.com/archive.travis-ci.org/jobs/55322327/log.txt
Comment 1 Marek Safar 2015-03-25 10:32:52 UTC
Fixed in Mono 4.0