diff -r 9aeb9e2d28a7 -r 3a333a582d7b tests/test-remotefilelog-corrupt-cache.t
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-remotefilelog-corrupt-cache.t	Thu Sep 27 13:03:19 2018 -0400
@@ -0,0 +1,73 @@
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
+  $ . "$TESTDIR/remotefilelog-library.sh"
+
+  $ hginit master
+  $ cd master
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > server=True
+  > EOF
+  $ echo x > x
+  $ echo y > y
+  $ echo z > z
+  $ hg commit -qAm xy
+
+  $ cd ..
+
+  $ hgcloneshallow ssh://user@dummy/master shallow -q
+  3 files fetched over 1 fetches - (3 misses, 0.00% hit ratio) over *s (glob)
+  $ cd shallow
+
+Verify corrupt cache handling repairs by default
+
+  $ hg up -q null
+  $ chmod u+w $CACHEDIR/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0
+  $ echo x > $CACHEDIR/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0
+  $ hg up tip
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+Verify corrupt cache error message
+
+  $ hg up -q null
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > validatecache=off
+  > EOF
+  $ chmod u+w $CACHEDIR/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0
+  $ echo x > $CACHEDIR/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0
+  $ hg up tip 2>&1 | egrep "^RuntimeError"
+  RuntimeError: unexpected remotefilelog header: illegal format
+
+Verify detection and remediation when remotefilelog.validatecachelog is set
+
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > validatecachelog=$PWD/.hg/remotefilelog_cache.log
+  > validatecache=strict
+  > EOF
+  $ chmod u+w $CACHEDIR/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0
+  $ echo x > $CACHEDIR/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0
+  $ hg up tip
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+  $ cat .hg/remotefilelog_cache.log
+  corrupt $TESTTMP/hgcache/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1406e74118627694268417491f018a4a883152f0 during contains
+
+Verify handling of corrupt server cache
+
+  $ rm -f ../master/.hg/remotefilelogcache/y/076f5e2225b3ff0400b98c92aa6cdf403ee24cca
+  $ touch ../master/.hg/remotefilelogcache/y/076f5e2225b3ff0400b98c92aa6cdf403ee24cca
+  $ clearcache
+  $ hg prefetch -r .
+  3 files fetched over 1 fetches - (3 misses, 0.00% hit ratio) over *s (glob)
+  $ test -s ../master/.hg/remotefilelogcache/y/076f5e2225b3ff0400b98c92aa6cdf403ee24cca
+  $ hg debugremotefilelog $CACHEDIR/master/95/cb0bfd2977c761298d9624e4b4d4c72a39974a/076f5e2225b3ff0400b98c92aa6cdf403ee24cca
+  size: 2 bytes
+  path: $TESTTMP/hgcache/master/95/cb0bfd2977c761298d9624e4b4d4c72a39974a/076f5e2225b3ff0400b98c92aa6cdf403ee24cca 
+  key: 076f5e2225b3 
+  
+          node =>           p1            p2      linknode     copyfrom
+  076f5e2225b3 => 000000000000  000000000000  f3d0bb0d1e48