diff --git a/src/comment.rs b/src/comment.rs
index 31b6f25bf08..1862dda3581 100644
--- a/src/comment.rs
+++ b/src/comment.rs
@@ -134,6 +134,11 @@ fn comment_style(orig: &str, normalize_comments: bool) -> CommentStyle {
     }
 }
 
+/// Combine `prev_str` and `next_str` into a single `String`. `span` may contain
+/// comments between two strings. If there are such comments, then that will be
+/// recovered. If `allow_extend` is true and there is no comment between the two
+/// strings, then they will be put on a single line as long as doing so does not
+/// exceed max width.
 pub fn combine_strs_with_missing_comments(
     context: &RewriteContext,
     prev_str: &str,
diff --git a/src/items.rs b/src/items.rs
index fcf545a37bd..d0c5cf361c3 100644
--- a/src/items.rs
+++ b/src/items.rs
@@ -504,7 +504,7 @@ fn format_variant_list(
             items = itemize_list_with(0);
         }
 
-        let shape = self.shape().sub_width(2).unwrap();
+        let shape = self.shape().sub_width(2)?;
         let fmt = ListFormatting {
             tactic: DefinitiveListTactic::Vertical,
             separator: ",",
@@ -558,14 +558,7 @@ fn format_variant(&self, field: &ast::Variant, one_line_width: usize) -> Option<
             }
         };
 
-        combine_strs_with_missing_comments(
-            &context,
-            &attrs_str,
-            &variant_body,
-            span,
-            shape,
-            is_attributes_extendable(&attrs_str),
-        )
+        combine_strs_with_missing_comments(&context, &attrs_str, &variant_body, span, shape, false)
     }
 }
 
diff --git a/tests/source/enum.rs b/tests/source/enum.rs
index f228e5ef646..f3dbae4b84d 100644
--- a/tests/source/enum.rs
+++ b/tests/source/enum.rs
@@ -180,3 +180,15 @@ enum WidthOf101 {
     Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(::std::io::Error),
     Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(::std::io::Error),
 }
+
+// #2389
+pub enum QlError {
+    #[fail(display = "Parsing error: {}", 0)] LexError(parser::lexer::LexError),
+    #[fail(display = "Parsing error: {:?}", 0)] ParseError(parser::ParseError),
+    #[fail(display = "Validation error: {:?}", 0)] ValidationError(Vec<validation::Error>),
+    #[fail(display = "Execution error: {}", 0)] ExecutionError(String),
+    // (from, to)
+    #[fail(display = "Translation error: from {} to {}", 0, 1)] TranslationError(String, String),
+    // (kind, input, expected)
+    #[fail(display = "Could not find {}: Found: {}, expected: {:?}", 0, 1, 2)] ResolveError(&'static str, String, Option<String>),
+}
diff --git a/tests/target/enum.rs b/tests/target/enum.rs
index 09578d7ec24..de88f610b6a 100644
--- a/tests/target/enum.rs
+++ b/tests/target/enum.rs
@@ -24,7 +24,8 @@ enum EmtpyWithComment {
 // C-style enum
 enum Bar {
     A = 1,
-    #[someAttr(test)] B = 2, // comment
+    #[someAttr(test)]
+    B = 2, // comment
     C,
 }
 
@@ -225,7 +226,8 @@ enum AnError {
 
 // #2193
 enum WidthOf101 {
-    #[fail(display = ".....................................................")] Io(::std::io::Error),
+    #[fail(display = ".....................................................")]
+    Io(::std::io::Error),
     #[fail(display = ".....................................................")]
     Ioo(::std::io::Error),
     Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(::std::io::Error),
@@ -233,3 +235,21 @@ enum WidthOf101 {
         ::std::io::Error,
     ),
 }
+
+// #2389
+pub enum QlError {
+    #[fail(display = "Parsing error: {}", 0)]
+    LexError(parser::lexer::LexError),
+    #[fail(display = "Parsing error: {:?}", 0)]
+    ParseError(parser::ParseError),
+    #[fail(display = "Validation error: {:?}", 0)]
+    ValidationError(Vec<validation::Error>),
+    #[fail(display = "Execution error: {}", 0)]
+    ExecutionError(String),
+    // (from, to)
+    #[fail(display = "Translation error: from {} to {}", 0, 1)]
+    TranslationError(String, String),
+    // (kind, input, expected)
+    #[fail(display = "Could not find {}: Found: {}, expected: {:?}", 0, 1, 2)]
+    ResolveError(&'static str, String, Option<String>),
+}