more robust physical timeout (despite 1bea05713dde), especially relevant for quickcheck where large unary numerals may cause excessive heap allocations and resulting GC is better included in the timing;
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala compiler within the Isabelle environment
isabelle scala_build || exit $?
classpath "$ISABELLE_SETUP_CLASSPATH"; unset ISABELLE_SETUP_CLASSPATH
classpath "$CLASSPATH"; unset CLASSPATH
isabelle_scala scalac -Dfile.encoding=UTF-8 \
-classpath "$(platform_path "$ISABELLE_CLASSPATH")" "$@"