Jim LaGrone <[email protected]> wrote on 07/22/2009 11:22:52 AM: > I'm trying to use the following to read input from a text file > > ============================ > import x10.io.Console; > import x10.util.*; > import x10.io.*; > > public class Tester { > public static def main(args:Rail[String]) { > try { > val inputFile = new File("./param_file.txt"); > val input = inputFile.openRead(); > > for( l in input.lines()) { > Console.OUT.println(l); > } > } catch(e:IOException) { > Console.OUT.println("Problem:"); > e.printStackTrace(Console.ERR); > } > } > } > ===================================== > > but receive the following > > ===================================== > > $ x10 Tester > java.lang.ClassCastException > at x10.io.ReaderIterator$1.cast(ReaderIterator.java:123) > at x10.io.ReaderIterator.next(ReaderIterator.java:128) > at Tester.main(Tester.java:89) > at Tester$Main$1.apply(Tester.java:48) > at x10.runtime.Activity.now(Activity.java:214) > at x10.runtime.Activity.run(Activity.java:131) > at x10.runtime.Worker$3.apply(Worker.java:308) > at x10.runtime.impl.java.Runtime.runAt(Runtime.java:96) > at x10.runtime.Worker.loop(Worker.java:303) > at x10.runtime.Runtime.start(Runtime.java:141) > at Tester$Main.main(Tester.java:35) > at x10.runtime.impl.java.Runtime.run(Runtime.java:46) > at java.lang.Thread.run(Thread.java:613) > > ===================================== > > Any suggestions?
Hi, Jim, Thank you for using X10. You have encountered an X10 typechecker bug that manifests as invalid code generated by the Java backend. I've opened a JIRA issue for this: http://jira.codehaus.org/browse/XTENLANG-473 . Note that this issue only affects the Java backend - your code works fine in the C++ backend. In the meantime, you can work around this problem by replacing your for loop with the following: try { while (true) { val l = input.readLine(); Console.OUT.println(l); } } catch(e:EOFException) { } This essentially inlines the code of ReaderIterator, and should work even after the above bug is fixed. In the future, if you encounter a problem that looks like a bug, please open a JIRA issue with a test case. This would make it easier for us to track the problem and provide a fix. Thanks, Igor -- Igor Peshansky (note the spelling change!) IBM T.J. Watson Research Center XJ: No More Pain for XML's Gain (http://www.research.ibm.com/xj/) X10: Parallel Productivity and Performance (http://x10.sf.net/) ------------------------------------------------------------------------------ _______________________________________________ X10-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/x10-users
