# HG changeset patch
# User Pulkit Goyal <pulkit@yandex-team.ru>
# Date 2019-02-26 14:26:33
# Node ID 8ad46ac6728ec1e4ddf805950025fde20c8afcc5
# Parent  941685500125d3f2a4c0d104a3d5b09c17827c08

branchmap: prevent reading the file twice through different iterators

Otherwise, test-static-http.t breaks.

Differential Revision: https://phab.mercurial-scm.org/D6028

diff --git a/mercurial/branchmap.py b/mercurial/branchmap.py
--- a/mercurial/branchmap.py
+++ b/mercurial/branchmap.py
@@ -179,7 +179,7 @@ class branchcache(dict):
             if not bcache.validfor(repo):
                 # invalidate the cache
                 raise ValueError(r'tip differs')
-            bcache.load(repo, f)
+            bcache.load(repo, lineiter)
         except (IOError, OSError):
             return None
 
@@ -198,10 +198,10 @@ class branchcache(dict):
 
         return bcache
 
-    def load(self, repo, f):
-        """ fully loads the branchcache by reading from the file f """
+    def load(self, repo, lineiter):
+        """ fully loads the branchcache by reading from the file using the line
+        iterator passed"""
         cl = repo.changelog
-        lineiter = iter(f)
         for line in lineiter:
             line = line.rstrip('\n')
             if not line: