NPE when starting karaf using bin/shell

bin/shell "echo test"
 Exception in thread "main" java.lang.NullPointerException: "in" is null!
 at java.nio.channels.Channels.checkNotNull(Channels.java:67)
 at java.nio.channels.Channels.newChannel(Channels.java:347)
 at org.apache.felix.gogo.runtime.CommandSessionImpl.<init>(CommandSessionImpl.java:108)
 at org.apache.felix.gogo.runtime.CommandProcessorImpl.createSession(CommandProcessorImpl.java:82)
 at org.apache.felix.gogo.runtime.CommandProcessorImpl.createSession(CommandProcessorImpl.java:38)
 at org.apache.karaf.shell.impl.console.ConsoleSessionImpl.<init>(ConsoleSessionImpl.java:138)
 at org.apache.karaf.shell.impl.console.SessionFactoryImpl.create(SessionFactoryImpl.java:139)
 at org.apache.karaf.shell.impl.console.standalone.Main.createSession(Main.java:180)
 at org.apache.karaf.shell.impl.console.standalone.Main.run(Main.java:143)
 at org.apache.karaf.shell.impl.console.standalone.Main.run(Main.java:136)
 at org.apache.karaf.shell.impl.console.standalone.Main.run(Main.java:76)
 at org.apache.karaf.shell.impl.console.standalone.Main.main(Main.java:58)}}