--- /dev/null
+#!/bin/bash
+set -e
+. tests/lib
+
+t-tstunt-parsechangelog
+
+t-prep-newpackage example 1.0
+
+ln -s $troot/pkg-srcs/${p}_${v%-*}.orig.tar.* .
+
+cd $p
+
+start () { git checkout quilt-tip~0; }
+attempt () { t-dgit -wgf --quilt=smash quilt-fixup; }
+
+badly-1 () {
+ wrongfn=$1
+ wrongmsg=$2
+ start
+}
+
+badly-2 () {
+ git commit -m "Commit wrongness $wrongfn ($wrongmsg)"
+ t-expect-fail "cannot represent change: $wrongmsg: $wrongfn" \
+ attempt
+}
+
+badly-1 symlink 'not a plain file'
+ ln -s TARGET symlink
+ git add symlink
+badly-2
+
+badly-1 src.c deleted
+ git rm src.c
+badly-2
+
+badly-1 src.c 'mode changed'
+ chmod +x src.c
+ git add src.c
+badly-2
+
+badly-1 new 'non-default mode'
+ echo hi >new
+ chmod 755 new
+ git add new
+badly-2
+
+start
+attempt
+
+echo ok.