--- a/tests/test-lfconvert.t	Thu Oct 18 16:34:13 2012 -0500
+++ b/tests/test-lfconvert.t	Sun Oct 14 14:44:08 2012 -0400
@@ -1,3 +1,5 @@
+  $ USERCACHE="$TESTTMP/cache"; export USERCACHE
+  $ mkdir "${USERCACHE}"
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > largefiles =
@@ -8,6 +10,7 @@
   > minsize = 0.5
   > patterns = **.other
   >     **.dat
+  > usercache=${USERCACHE}
   > EOF
 
 "lfconvert" works
@@ -270,3 +273,14 @@
   pass
 
   $ cd ..
+
+Avoid a traceback if a largefile isn't available (issue3519)
+
+  $ hg clone -U largefiles-repo issue3519
+  $ rm "${USERCACHE}"/*
+  $ hg lfconvert --to-normal issue3519 normalized3519
+  initializing destination normalized3519
+  abort: missing largefile 'large' from revision d4892ec57ce212905215fad1d9018f56b99202ad
+  [255]
+
+