New subject: Potential bug thrown in 'out:format' when argument is an empty sequence

2 Mar 2015


      Hi all,
             Executing,
out:format("hello %s", ())
throws Potential bug error. It is clear that 'out:format' function 
expects an argument of type item(), but this error seems scary :)
Error:
Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 8.1 beta
Java: Oracle Corporation, 1.7.0_75
OS: Linux, amd64
Stack Trace:
java.lang.NullPointerException
     at org.basex.query.func.out.OutFormat.item(OutFormat.java:25)
     at org.basex.query.func.StandardFunc.optimize(StandardFunc.java:80)
     at org.basex.query.func.StandardFunc.compile(StandardFunc.java:74)
     at org.basex.query.MainModule.compile(MainModule.java:73)
     at org.basex.query.QueryCompiler.compile(QueryCompiler.java:113)
     at org.basex.query.QueryCompiler.compile(QueryCompiler.java:104)
     at org.basex.query.QueryContext.analyze(QueryContext.java:323)
     at org.basex.query.QueryContext.compile(QueryContext.java:312)
     at org.basex.query.QueryProcessor.compile(QueryProcessor.java:68)
     at org.basex.core.cmd.AQuery.query(AQuery.java:75)
     at org.basex.core.cmd.XQuery.run(XQuery.java:22)
     at org.basex.core.Command.run(Command.java:379)
     at org.basex.core.Command.execute(Command.java:95)
     at org.basex.gui.GUI.exec(GUI.java:466)
     at org.basex.gui.GUI.access$400(GUI.java:41)
     at org.basex.gui.GUI$7.run(GUI.java:410)
Query:
out:format("hello %s", ())
Best Regards,
Seenivasan