Actually fix #26193 now.

The earlier attempt to fix this issue in 98244f3 did not work, because
it was missing the important `-f` switch.

CHANGELOG.md

@@ -1,3 +1,10 @@
+# Changes in version 1.?.? - 2018-0?-??
+
+ * Minor changes
+   - Once more, fix the bug in the tarball-creation script where
+     tarballs are not compressed in a run following an aborted run.
+
+
 # Changes in version 1.7.0 - 2018-07-14
 
  * Medium changes

src/main/resources/create-tarballs.sh

@@ -100,7 +100,7 @@ for (( i = 0 ; i < ${#TARBALLS[@]} ; i++ )); do
   echo `date` "Creating" ${TARBALLS[$i]}'.tar'
   tar chf ${TARBALLS[$i]}.tar ${TARBALLS[$i]}
   echo `date` "Compressing" ${TARBALLS[$i]}'.tar'
-  xz -9e ${TARBALLS[$i]}.tar
+  xz -9e -f ${TARBALLS[$i]}.tar
 done
 
 cd $OUTDIR/webstats/