Fix tafia#597: Pop namespace scope after NsReader::read_to_end

Author: Mingun

Changelog.md

@@ -14,8 +14,13 @@
 
 ### Bug Fixes
 
+- [#597]: Fixed incorrect processing of namespace scopes in `NsReader::read_to_end`.
+  The scope started by a start element was not ended after that call.
+
 ### Misc Changes
 
+[#597]: https://github.com/tafia/quick-xml/issues/597
+
 
 ## 0.28.2 -- 2023-04-12
 

src/reader/ns_reader.rs

@@ -760,7 +760,11 @@ impl<'i> NsReader<&'i [u8]> {
     pub fn read_to_end(&mut self, end: QName) -> Result<Span> {
         // According to the https://www.w3.org/TR/xml11/#dt-etag, end name should
         // match literally the start name. See `Self::check_end_names` documentation
-        self.reader.read_to_end(end)
+        let result = self.reader.read_to_end(end)?;
+        // read_to_end will consume closing tag. Because nobody can access to its
+        // content anymore, we directly pop namespace of the opening tag
+        self.ns_resolver.pop(&mut self.buffer);
+        Ok(result)
     }
 
     /// Reads content between start and end tags, including any markup. This

tests/issues.rs

@@ -5,8 +5,8 @@
 use std::sync::mpsc;
 
 use quick_xml::events::{BytesStart, Event};
-use quick_xml::name::QName;
-use quick_xml::reader::Reader;
+use quick_xml::name::{Namespace, QName, ResolveResult};
+use quick_xml::reader::{NsReader, Reader};
 use quick_xml::Error;
 
 /// Regression test for https://github.com/tafia/quick-xml/issues/115
@@ -105,3 +105,36 @@ mod issue514 {
         assert_eq!(reader.read_event().unwrap(), Event::Eof);
     }
 }
+
+#[test]
+fn issue597() {
+    const S: &'static str = r#"
+    <?xml version="1.0" encoding="UTF-8"?>
+    <oval_definitions xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5">
+        <tests>
+            <xmlfilecontent_test xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#independent">
+            </xmlfilecontent_test>
+            <xmlfilecontent_test xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#independent">
+            </xmlfilecontent_test>
+        </tests>
+        <objects/>
+    </oval_definitions>"#;
+
+    let mut reader = NsReader::from_str(S);
+    let ns = loop {
+        let (ns, ev) = reader.read_resolved_event().unwrap();
+        match ev {
+            Event::Start(v) if v.local_name().as_ref() == b"xmlfilecontent_test" => {
+                reader.read_to_end(v.name()).unwrap();
+            }
+            Event::Empty(v) if v.local_name().as_ref() == b"objects" => break ns,
+            _ => (),
+        }
+    };
+    assert_eq!(
+        ns,
+        ResolveResult::Bound(Namespace(
+            b"http://oval.mitre.org/XMLSchema/oval-definitions-5"
+        ))
+    );
+}