<html><head></head><body><div style="font-family:courier new, courier, monaco, monospace, sans-serif;font-size:medium;"><div><div>Yes, of course. If I could, I would. That's not an option at the moment.</div></div><div><br></div><div><br></div><div id="yahoo_quoted_9350400457" class="yahoo_quoted"><div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;"><div>On Tuesday, June 27, 2017, 9:31:34 PM PDT, Andres <knocte@gmail.com> wrote:</div><div><br></div><div><br></div><div><div dir='ltr'><html><body>Mono 3.10.0 is very old, I recommend upgrading before investigating <br clear="none">more. You never know if you might be chasing a bug that is fixed already.<br clear="none"><br clear="none">On Friday, June 23, 2017 02:16 AM, Sotirios Delimanolis via <br clear="none">Mono-devel-list wrote:<br clear="none">> Running Mono 3.10.0<br clear="none">> <br clear="none">> Mono JIT compiler version 3.10.0 (tarball Fri Oct 10 17:29:39 UTC 2014)<br clear="none">> <br clear="none">> We're seeing an unhandled exception that crashes our program in <br clear="none">> MemoryCache's scheduled cleanup . This is the stack trace dumped before exit<br clear="none">> <br clear="none">> 2017-06-22 03:14:28.478510 GMT Unhandled Exception:<br clear="none">> 2017-06-22 03:14:28.478511 GMT System.NullReferenceException: Object <br clear="none">> reference not set to an instance of an object<br clear="none">> 2017-06-22 03:14:28.478512 GMT   at <br clear="none">> System.Collections.Generic.RBTree.find_key[String] (System.String key, <br clear="none">> System.Collections.Generic.List`1 path) [0x00000] in <filename unknown>:0<br clear="none">> 2017-06-22 03:14:28.478514 GMT   at <br clear="none">> System.Collections.Generic.RBTree.Remove[String] (System.String key) <br clear="none">> [0x00000] in <filename unknown>:0<br clear="none">> 2017-06-22 03:14:28.478551 GMT   at <br clear="none">> System.Collections.Generic.SortedDictionary`2[System.String,System.Runtime.Caching.MemoryCacheEntry].Remove <br clear="none">> (System.String key) [0x00000] in <filename unknown>:0<br clear="none">> 2017-06-22 03:14:28.478553 GMT   at <br clear="none">> System.Runtime.Caching.MemoryCacheContainer.DoRemoveEntry <br clear="none">> (System.Runtime.Caching.MemoryCacheEntry entry, Boolean updateLRU, <br clear="none">> System.String key, CacheEntryRemovedReason reason) [0x00000] in <br clear="none">> <filename unknown>:0<br clear="none">> 2017-06-22 03:14:28.478557 GMT   at <br clear="none">> System.Runtime.Caching.MemoryCacheContainer.DoRemoveExpiredItems <br clear="none">> (Boolean needLock) [0x00000] in <filename unknown>:0<br clear="none">> 2017-06-22 03:14:28.478559 GMT   at <br clear="none">> System.Runtime.Caching.MemoryCacheContainer.RemoveExpiredItems <br clear="none">> (System.Object state) [0x00000] in <filename unknown>:0<br clear="none">> 2017-06-22 03:14:28.478562 GMT   at <br clear="none">> System.Threading.Timer+Scheduler.TimerCB (System.Object o) [0x00000] in <br clear="none">> <filename unknown>:0<br clear="none">> <br clear="none">> Looking at the find_keyimplementation here <br clear="none">> <<a shape="rect" href="https://github.com/mono/mono/blob/mono-3.10.0-branch/mcs/class/System/System.Collections.Generic/RBTree.cs#L306-L335" target="_blank">https://github.com/mono/mono/blob/mono-3.10.0-branch/mcs/class/System/System.Collections.Generic/RBTree.cs#L306-L335</a>>, <div class="yqt8298982526" id="yqtfd23232"><br clear="none">> I don't see anything that can be null that could cause a <br clear="none">> NullReferenceException.<br clear="none">> <br clear="none">> What is going on?</div><br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> _______________________________________________<br clear="none">> Mono-devel-list mailing list<br clear="none">> <a shape="rect" ymailto="mailto:Mono-devel-list@lists.dot.net" href="mailto:Mono-devel-list@lists.dot.net">Mono-devel-list@lists.dot.net</a><br clear="none">> <a shape="rect" href="http://lists.dot.net/mailman/listinfo/mono-devel-list" target="_blank">http://lists.dot.net/mailman/listinfo/mono-devel-list</a><br clear="none">> <br clear="none"><br clear="none"><br clear="none">_______________________________________________<br clear="none">Mono-devel-list mailing list<br clear="none"><a shape="rect" ymailto="mailto:Mono-devel-list@lists.dot.net" href="mailto:Mono-devel-list@lists.dot.net">Mono-devel-list@lists.dot.net</a><br clear="none"><a shape="rect" href="http://lists.dot.net/mailman/listinfo/mono-devel-list" target="_blank">http://lists.dot.net/mailman/listinfo/mono-devel-list</a><div class="yqt8298982526" id="yqtfd18581"><br clear="none"></div></body></html></div></div></div></div></div></body></html>