Bug 29230 - ConcurrentDictionary.TryUpdate throw NullReferenceException
Summary: ConcurrentDictionary.TryUpdate throw NullReferenceException
Alias: None
Product: Class Libraries
Classification: Mono
Component: mscorlib ()
Version: 3.12.0
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2015-04-19 12:43 UTC by mikey10
Modified: 2015-04-20 05:30 UTC (History)
2 users (show)

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

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Description mikey10 2015-04-19 12:43:50 UTC
`null` is a valid value for a ConcurrentDictionary.
Nevertheless, if a value is `null`, TryUpdate() of this key throws a NullReferenceException.

var dict = new ConcurrentDictionary<string,string> ();		
Assert.IsTrue (dict.TryAdd ("foo", null));
Assert.IsTrue (dict.TryUpdate ("foo", "bar", null /* or any other string */ ));

Expected behavior:
Test passes.
Comment 1 Marek Safar 2015-04-20 05:30:01 UTC
Fixed in mono 4.0