--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-username-newline.t	Tue Sep 14 16:52:32 2010 +0200
@@ -0,0 +1,24 @@
+  $ hg init
+  $ touch a
+
+  $ unset HGUSER
+  $ echo "[ui]" >> .hg/hgrc
+  $ echo "username= foo" >> .hg/hgrc
+  $ echo "          bar1" >> .hg/hgrc
+
+  $ hg ci -Am m
+  adding a
+  abort: username 'foo\nbar1' contains a newline
+  
+  $ rm .hg/hgrc
+
+  $ HGUSER=`(echo foo; echo bar2)` hg ci -Am m
+  abort: username 'foo\nbar2' contains a newline
+  
+  $ hg ci -Am m -u "`(echo foo; echo bar3)`"
+  transaction abort!
+  rollback completed
+  abort: username 'foo\nbar3' contains a newline!
+
+  $ true
+