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    <title>MongoDB Jira</title>
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    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[CSHARP-634] Over-eager expression tree normalization for assignable types</title>
                <link>https://jira.mongodb.org/browse/CSHARP-634</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;We are being too aggressive when normalizing an expression tree.  Stack trace below.  I think the issue is here: &lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/blob/master/Driver/Linq/Expressions/ExpressionNormalizer.cs#L148&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/blob/master/Driver/Linq/Expressions/ExpressionNormalizer.cs#L148&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;   at System.Linq.Expressions.Expression.GetEqualityComparisonOperator(ExpressionType binaryType, String opName, Expression left, Expression right, Boolean liftToNull)&lt;br/&gt;
   at System.Linq.Expressions.Expression.Equal(Expression left, Expression right, Boolean liftToNull, MethodInfo method)&lt;br/&gt;
   at System.Linq.Expressions.Expression.MakeBinary(ExpressionType binaryType, Expression left, Expression right, Boolean liftToNull, MethodInfo method, LambdaExpression conversion)&lt;br/&gt;
   at System.Linq.Expressions.Expression.MakeBinary(ExpressionType binaryType, Expression left, Expression right, Boolean liftToNull, MethodInfo method)&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.VisitBinary(BinaryExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 165&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionNormalizer.VisitBinary(BinaryExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionNormalizer.cs:line 133&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.Visit(Expression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 84&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.VisitBinary(BinaryExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 154&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionNormalizer.VisitBinary(BinaryExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionNormalizer.cs:line 133&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.Visit(Expression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 84&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.VisitLambda(LambdaExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 275&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.Visit(Expression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 98&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.VisitUnary(UnaryExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 522&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionNormalizer.VisitUnary(UnaryExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionNormalizer.cs:line 143&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.Visit(Expression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 60&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.Visit(ReadOnlyCollection`1 nodes) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 125&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.VisitMethodCall(MethodCallExpression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 438&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionVisitor.Visit(Expression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionVisitor.cs:line 96&lt;br/&gt;
   at MongoDB.Driver.Linq.ExpressionNormalizer.Normalize(Expression node) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Expressions\ExpressionNormalizer.cs:line 51&lt;br/&gt;
   at MongoDB.Driver.Linq.MongoQueryTranslator.Translate(MongoQueryProvider provider, Expression expression) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\Translators\MongoQueryTranslator.cs:line 49&lt;br/&gt;
   at MongoDB.Driver.Linq.MongoQueryProvider.Execute(Expression expression) in C:\work\rstam\mongo-csharp-driver\Driver\Linq\MongoQueryProvider.cs:line 154&lt;br/&gt;
   at MongoDB.Driver.Linq.MongoQueryable`1.GetEnumerator() in C:\work\rstam\mongo-csharp-driver\Driver\Linq\MongoQueryable.cs:line 81&lt;br/&gt;
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)&lt;br/&gt;
   at System.Linq.Enumerable.ToList&lt;span class=&quot;error&quot;&gt;&amp;#91;TSource&amp;#93;&lt;/span&gt;(IEnumerable`1 source)&lt;br/&gt;
   at Newtonsoft.Json.Serialization.JsonArrayContract.CreateWrapper(Object list)&lt;br/&gt;
   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)&lt;br/&gt;
   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value)&lt;br/&gt;
   at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value)&lt;br/&gt;
   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)&lt;br/&gt;
   at System.Net.Http.Formatting.JsonMediaTypeFormatter.&amp;lt;&amp;gt;c_&lt;em&gt;DisplayClassd.&amp;lt;WriteToStreamAsync&amp;gt;b&lt;/em&gt;_c()&lt;br/&gt;
   at System.Threading.Tasks.TaskHelpers.RunSynchronously(Action action, CancellationToken token)&lt;/p&gt;</description>
                <environment></environment>
        <key id="57478">CSHARP-634</key>
            <summary>Over-eager expression tree normalization for assignable types</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="craig.wilson@mongodb.com">Craig Wilson</reporter>
                        <labels>
                    </labels>
                <created>Mon, 26 Nov 2012 16:53:44 +0000</created>
                <updated>Wed, 26 Dec 2012 14:21:37 +0000</updated>
                            <resolved>Wed, 26 Dec 2012 14:21:26 +0000</resolved>
                                    <version>1.6.1</version>
                                    <fixVersion>1.8</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="224547" author="craiggwilson" created="Wed, 26 Dec 2012 14:21:22 +0000"  >&lt;p&gt;The fix for &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-634&quot; title=&quot;Over-eager expression tree normalization for assignable types&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-634&quot;&gt;&lt;del&gt;CSHARP-634&lt;/del&gt;&lt;/a&gt; was implemented as a fix for this issue.  Hence, both issues have been resolved.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="57052">CSHARP-632</issuekey>
        </issuelink>
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