diff --git a/src/compare/util.rs b/src/compare/util.rs
index 5e60021..1fa9daa 100644
--- a/src/compare/util.rs
+++ b/src/compare/util.rs
@@ -100,20 +100,28 @@ fn assert_bounds<'b, 's, S: StandardProperties<'s> + ?Sized>(
 
     // Check contents-begin/contents-end
     {
-        let (begin, end) = (
-            standard_properties
-                .contents_begin
-                .ok_or("Token should have a begin.")?,
-            standard_properties
-                .contents_end
-                .ok_or("Token should have an end.")?,
-        );
-        let (rust_begin, rust_end) = get_rust_byte_offsets(original_document, rust.get_contents()); // 0-based
-        let rust_begin_char_offset = original_document[..rust_begin].chars().count() + 1; // 1-based
-        let rust_end_char_offset =
-            rust_begin_char_offset + original_document[rust_begin..rust_end].chars().count(); // 1-based
-        if rust_begin_char_offset != begin || rust_end_char_offset != end {
-            Err(format!("Rust contents bounds (in chars) ({rust_begin}, {rust_end}) do not match emacs contents bounds ({emacs_begin}, {emacs_end})", rust_begin = rust_begin_char_offset, rust_end = rust_end_char_offset, emacs_begin=begin, emacs_end=end))?;
+        if let Some(rust_contents) = rust.get_contents() {
+            let (begin, end) = (
+                standard_properties
+                    .contents_begin
+                    .ok_or("Token should have a contents-begin.")?,
+                standard_properties
+                    .contents_end
+                    .ok_or("Token should have an contents-end.")?,
+            );
+            let (rust_begin, rust_end) = get_rust_byte_offsets(original_document, rust_contents); // 0-based
+            let rust_begin_char_offset = original_document[..rust_begin].chars().count() + 1; // 1-based
+            let rust_end_char_offset =
+                rust_begin_char_offset + original_document[rust_begin..rust_end].chars().count(); // 1-based
+            if rust_begin_char_offset != begin || rust_end_char_offset != end {
+                Err(format!("Rust contents bounds (in chars) ({rust_begin}, {rust_end}) do not match emacs contents bounds ({emacs_begin}, {emacs_end})", rust_begin = rust_begin_char_offset, rust_end = rust_end_char_offset, emacs_begin=begin, emacs_end=end))?;
+            }
+        } else {
+            if standard_properties.contents_begin.is_some()
+                || standard_properties.contents_end.is_some()
+            {
+                Err(format!("Rust contents is None but emacs contents bounds are ({emacs_begin:?}, {emacs_end:?})", emacs_begin=standard_properties.contents_begin, emacs_end=standard_properties.contents_end))?;
+            }
         }
     }