Currently, the Single-file source launcher does not work when a security manager is installed. It should.

 source launcher fails when running security manager.

$ java -Djava.security.manager Main.java
Exception in thread "main" java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessClassInPackage.jdk.internal.misc")
at java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
at java.base/java.security.AccessController.checkPermission(AccessController.java:895)
at java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:322)
at java.base/java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1238)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:174)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:126)