From 98a0ef2436d70bdbb7283f3816e7cc08825a369c Mon Sep 17 00:00:00 2001
From: Diogo Sousa <diogogsousa@gmail.com>
Date: Fri, 21 Sep 2018 18:46:35 +0100
Subject: [PATCH] Fix bug in import where two consecutive module separators
 were possible.

Fixes #3043.
---
 src/imports.rs             | 6 +++++-
 tests/target/issue-3043.rs | 5 +++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 tests/target/issue-3043.rs

diff --git a/src/imports.rs b/src/imports.rs
index 962d82868d7..f4751eb117b 100644
--- a/src/imports.rs
+++ b/src/imports.rs
@@ -324,11 +324,15 @@ impl UseTree {
             && a.prefix.to_string().len() > 2
             && a.prefix.to_string().starts_with("::");
 
+        let mut modsep = leading_modsep;
+
         for p in &a.prefix.segments {
-            if let Some(use_segment) = UseSegment::from_path_segment(context, p, leading_modsep) {
+            if let Some(use_segment) = UseSegment::from_path_segment(context, p, modsep) {
                 result.path.push(use_segment);
+                modsep = false;
             }
         }
+
         match a.kind {
             UseTreeKind::Glob => {
                 result.path.push(UseSegment::Glob);
diff --git a/tests/target/issue-3043.rs b/tests/target/issue-3043.rs
new file mode 100644
index 00000000000..b54e244a401
--- /dev/null
+++ b/tests/target/issue-3043.rs
@@ -0,0 +1,5 @@
+// rustfmt-edition: 2018
+
+use ::std::vec::Vec;
+
+fn main() {}