diff --git a/implementations/rust/preserves/src/value/packed/writer.rs b/implementations/rust/preserves/src/value/packed/writer.rs
index a2903c6..59995e0 100644
--- a/implementations/rust/preserves/src/value/packed/writer.rs
+++ b/implementations/rust/preserves/src/value/packed/writer.rs
@@ -140,8 +140,6 @@ impl<W: io::Write> Writer for PackedWriter<W>
     fn boundary(&mut self, b: &B::Type) -> io::Result<()> {
         match b.closing {
             Some(B::Item::DictionaryValue) |
-            Some(B::Item::RecordField) |
-            Some(B::Item::SequenceValue) |
             Some(B::Item::SetValue) =>
                 self.shift(),
             _ =>
@@ -336,25 +334,21 @@ impl<W: io::Write> Writer for PackedWriter<W>
 
     #[inline(always)]
     fn start_record(&mut self) -> io::Result<()> {
-        self.write_tag(Tag::Record)?;
-        self.push()
+        self.write_tag(Tag::Record)
     }
 
     #[inline(always)]
     fn end_record(&mut self) -> io::Result<()> {
-        self.pop(false)?;
         self.write_tag(Tag::End)
     }
 
     #[inline(always)]
     fn start_sequence(&mut self) -> io::Result<()> {
-        self.write_tag(Tag::Sequence)?;
-        self.push()
+        self.write_tag(Tag::Sequence)
     }
 
     #[inline(always)]
     fn end_sequence(&mut self) -> io::Result<()> {
-        self.pop(false)?;
         self.write_tag(Tag::End)
     }
 
@@ -384,8 +378,7 @@ impl<W: io::Write> Writer for PackedWriter<W>
 
     #[inline(always)]
     fn start_embedded(&mut self) -> io::Result<()> {
-        self.write_tag(Tag::Embedded)?;
-        Ok(())
+        self.write_tag(Tag::Embedded)
     }
 
     #[inline(always)]