Evaluation of String problem

[Roy van Rijn]

Some more questions:

When I get the latest JDK9 (not Kulla branch) and build the entire
image the resulting jshell does work and doesn't show this
behaviour... what is the current latest source for the jshell? When
demoing/showcasing/testing, which is version preferred?

On Mon, Nov 2, 2015 at 2:01 AM, Roy van Rijn <roy.van.rijn at gmail.com> wrote:
> Dear kulla-devs,
>
> Trying the latest code from the kulla branch, and I've done the following:
> 1) Install JDK 9
> 2) Get latest sources: get_sources.sh
> 3) Modified script/compile.sh for OS/X (/bin instead of /usr/bin)
> 4) Modified script/compile.sh removed path
> ../src/jdk.jshell/share/classes/*/*/*/*/*/*.java (there doesnt seem to
> be a java file matching six stars)
> 5) Compile (no messages, works fine)
> 6) Modified script/run.sh for OS/X (/bin instead of /usr/bin)
> 7) Started jshell (although the version is: Version (version info not
> available))
>
> Next there seems to be a problem evaluating strings with the +
> operator, for example:
>
> -> String a = "a";
> |  Added variable a of type String with initial value "a"
> -> String b = "b";
> |  Added variable b of type String with initial value "b"
> -> String c = a + b;
> |  Added variable c of type String
> -> String d = "test " + " another test";
> |  Added variable d of type String
> -> System.out.println(a);
> a
> -> System.out.println(b);
> b
> -> System.out.println(c);
> null
> -> System.out.println(d);
> null
>
> Any idea what could be causing this? This breaks the most trivial of
> examples, for example:
> -> double tau = Math.PI * 2;
> |  Added variable tau of type double with initial value 6.283185307179586
>
> -> System.out.println("Tau is: " + tau);
> An exception has occurred in the compiler (1.9.0-ea). Please file a
> bug against the Java compiler via the Java bug reporting page
> (http://bugreport.java.com) after checking the Bug Database
> (http://bugs.java.com) for duplicates. Include your program and the
> following diagnostic in your report. Thank you.
> java.lang.AssertionError
> at com.sun.tools.javac.util.Assert.error(Assert.java:155)
> at com.sun.tools.javac.util.Assert.checkNonNull(Assert.java:62)
> at com.sun.tools.javac.util.ListBuffer.append(ListBuffer.java:127)
> at com.sun.tools.javac.parser.JavacParser.arguments(JavacParser.java:1799)
> at com.sun.tools.javac.parser.JavacParser.arguments(JavacParser.java:1814)
> at com.sun.tools.javac.parser.JavacParser.term3(JavacParser.java:1276)
> at com.sun.tools.javac.parser.JavacParser.term2(JavacParser.java:902)
> at com.sun.tools.javac.parser.JavacParser.term1(JavacParser.java:873)
> at com.sun.tools.javac.parser.JavacParser.term(JavacParser.java:829)
> at com.sun.tools.javac.parser.JavacParser.term(JavacParser.java:809)
> at jdk.jshell.ReplParser.replUnit(ReplParser.java:225)
> at jdk.jshell.ReplParser.parseCompilationUnit(ReplParser.java:132)
> at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:601)
> at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:638)
> at com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java:930)
> at com.sun.tools.javac.api.JavacTaskImpl.parseInternal(JavacTaskImpl.java:233)
> at com.sun.tools.javac.api.JavacTaskImpl.access$400(JavacTaskImpl.java:69)
> at com.sun.tools.javac.api.JavacTaskImpl$2.call(JavacTaskImpl.java:225)
> at com.sun.tools.javac.api.JavacTaskImpl$2.call(JavacTaskImpl.java:222)
> at com.sun.tools.javac.api.JavacTaskImpl.handleExceptions(JavacTaskImpl.java:128)
> at com.sun.tools.javac.api.JavacTaskImpl.parse(JavacTaskImpl.java:222)
> at jdk.jshell.TaskFactory$ParseTask.parse(TaskFactory.java:221)
> at jdk.jshell.TaskFactory$ParseTask.<init>(TaskFactory.java:207)
> at jdk.jshell.CompletenessAnalyzer$Parser.disambiguateDeclarationVsExpression(CompletenessAnalyzer.java:671)
> at jdk.jshell.CompletenessAnalyzer$Parser.parseUnit(CompletenessAnalyzer.java:615)
> at jdk.jshell.CompletenessAnalyzer.scan(CompletenessAnalyzer.java:87)
> at jdk.jshell.SourceCodeAnalysisImpl.analyzeCompletion(SourceCodeAnalysisImpl.java:133)
> at jdk.internal.jshell.tool.ConsoleIOContext$1.analyzeCompletion(ConsoleIOContext.java:77)
> at jdk.internal.jshell.tool.EditingHistory.add(EditingHistory.java:127)
> at jdk.internal.jline.console.ConsoleReader.finishBuffer(ConsoleReader.java:655)
> at jdk.internal.jline.console.ConsoleReader.accept(ConsoleReader.java:2027)
> at jdk.internal.jline.console.ConsoleReader.readLine(ConsoleReader.java:2695)
> at jdk.internal.jline.console.ConsoleReader.readLine(ConsoleReader.java:2277)
> at jdk.internal.jshell.tool.ConsoleIOContext.readLine(ConsoleIOContext.java:153)
> at jdk.internal.jshell.tool.JShellTool.run(JShellTool.java:447)
> at jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:266)
> at jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:245)
> at jdk.internal.jshell.tool.JShellTool.main(JShellTool.java:235)
>
> Is there something wrong with the way I've compiled/used the latest
> code? Or is the jshell actually broken at this point?
>
> Roy