XslCompiledTransform doesn't work when using TrimMode=link #45393
Description
See the original report of this issue: #44995 (comment)
Run the following code in a Blazor WASM published app. Or in a console app that is PublishTrimmed=true && TrimMode=link
public static void UseXsl()
{
using (StringReader text = new StringReader(
@"<?xml version=""1.0"" encoding=""UTF-8""?>
<catalog>
<cd>
<title>Empire Burlesque</title>
<artist>Bob Dylan</artist>
<country>USA</country>
<company>Columbia</company>
<price>10.90</price>
<year>1985</year>
</cd>
</catalog>"))
{
XPathDocument myXPathDoc = new XPathDocument(text);
XslCompiledTransform myXslTrans = new XslCompiledTransform();
string xmlStr = @"<?xml version=""1.0""?>
<xsl:stylesheet version=""1.0"" xmlns:xsl=""http://www.w3.org/1999/XSL/Transform"">
<xsl:template match=""/"">
<html>
<body>
<h2> My CD Collection</h2>
<table border = ""1"">
<tr bgcolor = ""#9acd32"">
<th> Title </th>
<th> Artist </th>
</tr>
<xsl:for-each select = ""catalog/cd"">
<tr>
<td><xsl:value-of select = ""title"" /></td>
<td><xsl:value-of select = ""artist"" /></td>
</tr>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>";
using (StringReader str = new StringReader(xmlStr))
using (var reader = System.Xml.XmlReader.Create(str))
{
myXslTrans.Load(reader);
StringWriter myWriter = new StringWriter();
myXslTrans.Transform(myXPathDoc, null, myWriter);
Console.WriteLine(myWriter.GetStringBuilder().ToString());
}
}
}Expected results
The code should work the same way it does in a non-trimmed app.
Actual results
(unknown) Unhandled Exception:
window.console.error
(unknown) System.ArgumentNullException: ArgumentNull_Generic Arg_ParamName_Name, con
window.console.error
(unknown) at System.Reflection.Emit.CustomAttributeBuilder.Initialize(ConstructorInfo con, Object[] constructorArgs, PropertyInfo[] namedProperties, Object[] propertyValues, FieldInfo[] namedFields, Object[] fieldValues)
window.console.error
(unknown) at System.Reflection.Emit.CustomAttributeBuilder..ctor(ConstructorInfo con, Object[] constructorArgs)
window.console.error
(unknown) at System.Xml.Xsl.IlGen.XmlILModule.CreateLREModule()
window.console.error
(unknown) at System.Xml.Xsl.IlGen.XmlILModule..cctor()
window.console.error
(unknown) crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: TypeInitialization_Type, System.Xml.Xsl.IlGen.XmlILModule
System.TypeInitializationException: TypeInitialization_Type, System.Xml.Xsl.IlGen.XmlILModule
---> System.ArgumentNullException: ArgumentNull_Generic Arg_ParamName_Name, con
at System.Reflection.Emit.CustomAttributeBuilder.Initialize(ConstructorInfo con, Object[] constructorArgs, PropertyInfo[] namedProperties, Object[] propertyValues, FieldInfo[] namedFields, Object[] fieldValues)
at System.Reflection.Emit.CustomAttributeBuilder..ctor(ConstructorInfo con, Object[] constructorArgs)
at System.Xml.Xsl.IlGen.XmlILModule.CreateLREModule()
at System.Xml.Xsl.IlGen.XmlILModule..cctor()
Exception_EndOfInnerExceptionStack
at System.Xml.Xsl.XmlILGenerator.Generate(QilExpression query, TypeBuilder typeBldr)
at System.Xml.Xsl.XslCompiledTransform.CompileQilToMsil(XsltSettings settings)
at System.Xml.Xsl.XslCompiledTransform.LoadInternal(Object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver)
at System.Xml.Xsl.XslCompiledTransform.Load(XmlReader stylesheet)
at Panasoft.Web.MyData.Client.Pages.Monitor.TraceView.OnParametersSetAsync()
at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle)
It looks like the following code needs to be annotated correctly for the ILLinker to preserve the constructors correctly:
Side-note: The ILLink warnings caught this as well:
runtime/src/libraries/System.Private.Xml/src/ILLink/ILLink.Suppressions.xml
Lines 130 to 141 in aebd598