From 10f1257eb34d978ad230de503dc1df7a5d520d95 Mon Sep 17 00:00:00 2001
From: topecongiro <seuchida@gmail.com>
Date: Sun, 13 Aug 2017 10:17:52 +0900
Subject: [PATCH] Use correct width for subexpr_list

---
 src/chains.rs              | 1 +
 tests/source/expr-block.rs | 4 ++++
 tests/target/expr-block.rs | 5 +++++
 3 files changed, 10 insertions(+)

diff --git a/src/chains.rs b/src/chains.rs
index 75dac5b3227..9c129ef99ee 100644
--- a/src/chains.rs
+++ b/src/chains.rs
@@ -233,6 +233,7 @@ pub fn rewrite_chain(expr: &ast::Expr, context: &RewriteContext, shape: Shape) -
         connector.as_str()
     };
 
+    let subexpr_num = subexpr_list.len();
     let result = if is_small_parent && rewrites.len() > 1 {
         let second_connector = choose_first_connector(
             context,
diff --git a/tests/source/expr-block.rs b/tests/source/expr-block.rs
index 3b4e6356ff9..1d55bd0a0d9 100644
--- a/tests/source/expr-block.rs
+++ b/tests/source/expr-block.rs
@@ -282,3 +282,7 @@ fn issue_1862() {
         /* com */ this_last_arg_is_tooooooooooooooooooooooooooooooooo_long_to_be_kept_with_the_pre_comment ,
     )
 }
+
+fn issue_1878() {
+    let channel: &str = seq.next_element()?.ok_or_else(|| de::Error::invalid_length(2, &self))?;
+}
diff --git a/tests/target/expr-block.rs b/tests/target/expr-block.rs
index 68c5421c3ca..194798ff472 100644
--- a/tests/target/expr-block.rs
+++ b/tests/target/expr-block.rs
@@ -333,3 +333,8 @@ fn issue_1862() {
         this_last_arg_is_tooooooooooooooooooooooooooooooooo_long_to_be_kept_with_the_pre_comment,
     )
 }
+
+fn issue_1878() {
+    let channel: &str = seq.next_element()?
+        .ok_or_else(|| de::Error::invalid_length(2, &self))?;
+}