workaround for strange compiler crash of Poly/ML 5.0 and 5.1 at this point http://isabelle.in.tum.de/repos/isabelle/file/a2fc533175ff/src/HOL/Tools/Nitpick/nitpick_nut.ML#l997
#!/usr/bin/env bash
#
# Author: Makarius
#
# Generic Isabelle application wrapper.
if [ -L "$0" ]; then
TARGET="$(LC_ALL=C ls -l "$0" | sed 's/.* -> //')"
exec "$(cd "$(dirname "$0")"; cd "$(pwd -P)"; cd "$(dirname "$TARGET")"; pwd)/$(basename "$TARGET")" "$@"
fi
## settings
ISABELLE_HOME="$(cd "$(dirname "$0")"; pwd -P)"
source "$ISABELLE_HOME/lib/scripts/getsettings" || exit 2
unset ISABELLE_SETTINGS_PRESENT
## main
CLASSPATH="$(jvmpath "$CLASSPATH")"
exec "$ISABELLE_JAVA" \
"-Disabelle.home=$(jvmpath "$ISABELLE_HOME")" \
-jar "$(jvmpath "$ISABELLE_HOME/lib/classes/isabelle-scala.jar")" "$@"