From 7f4e7bf3af13ebff46b180de0bf77d3a19a29670 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Thu, 14 Jun 2018 17:48:53 +0200
Subject: [PATCH] fix Itertools::flatten regression in nightly.

---
 src/bcf/match_variants.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bcf/match_variants.rs b/src/bcf/match_variants.rs
index ef230601..e20d9985 100644
--- a/src/bcf/match_variants.rs
+++ b/src/bcf/match_variants.rs
@@ -83,7 +83,7 @@ pub fn match_variants(
             let var = Variant::new(&mut rec, &mut i)?;
             let matching = var.alleles.iter().map(|a| {
                 if let Some(range) = index.range(chrom, pos) {
-                    for v in range.map(|(_, idx_vars)| idx_vars).flatten() {
+                    for v in Itertools::flatten(range.map(|(_, idx_vars)| idx_vars)) {
                         if let Some(id) = var.matches(v, a, max_dist, max_len_diff) {
                             return id as i32;
                         }