From d306fc43179d6c1276cfa1bfad1a615c1cb62eda Mon Sep 17 00:00:00 2001
From: John Shahid <jvshahid@gmail.com>
Date: Tue, 15 Sep 2020 09:11:07 -0400
Subject: [PATCH] Do not use a default encoding when parsing XML documents.

This change fixes the tests in #2080, but introduces more errors.  The errors
are mostly unexpected null encoding when parsing an HTML document.
---
 ext/java/nokogiri/internals/XmlDomParserContext.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/java/nokogiri/internals/XmlDomParserContext.java b/ext/java/nokogiri/internals/XmlDomParserContext.java
index 3a75d72f6f..d400faae0c 100644
--- a/ext/java/nokogiri/internals/XmlDomParserContext.java
+++ b/ext/java/nokogiri/internals/XmlDomParserContext.java
@@ -93,7 +93,7 @@ public XmlDomParserContext(Ruby runtime, IRubyObject options) {
     public XmlDomParserContext(Ruby runtime, IRubyObject encoding, IRubyObject options) {
         super(runtime);
         this.options = new ParserContext.Options(RubyFixnum.fix2long(options));
-        java_encoding = NokogiriHelpers.getValidEncoding(encoding);
+        java_encoding = NokogiriHelpers.getValidEncodingOrNull(encoding);
         ruby_encoding = encoding;
         initErrorHandler();
         initParser(runtime);