It seems that we need to build the release with -sourceLevel 6 for it to work with Java 6.
On Thu, Dec 5, 2013 at 10:43 PM, Colin Alworth <niloc...@gmail.com> wrote: > Sorry for being unclear - I'm building/testing an application that makes > use of GWT while still on Java6, not building/testing GWT itself. I'm > trying to sanity test rc3 as a candidate for a final release of 2.6.0, and > as far as my testing goes, this is the only point it is failing. > > To clarify the point about the references to Matthew's machine, unzip the > gwt 2.6.0-rc3 download on code.google.com, unpack the gwt-user.jar file, > and try this: > > $ strings com/google/gwt/core/Core.gwtar | grep file | head > fileNameq > > bfile:/usr/local/google/home/mdempsky/wd/gwt/user/src/com/google/gwt/core/client/AsyncProvider.javat > fileNameq > > ]file:/usr/local/google/home/mdempsky/wd/gwt/user/src/com/google/gwt/core/client/Callback.javat > fileNameq > > jfile:/usr/local/google/home/mdempsky/wd/gwt/user/src/com/google/gwt/core/client/CodeDownloadException.javat > fileNameq > > ]file:/usr/local/google/home/mdempsky/wd/gwt/user/src/com/google/gwt/core/client/Duration.javat > fileNameq > fileNameq > > > On Friday, December 6, 2013 12:10:10 AM UTC-6, Roberto Lublinerman wrote: > >> Hi Colin, >> >> Did you do ant clean? I find it strange that the resource points to >> Matthew's hard drive, as if Impl was precompiled by him (and in that case >> probably is consistent that the version is 51.0). >> >> I build from scratch in my laptop (only has java 1.6) and builds and >> tests run fine. Is there a specific application that you are trying to >> build? >> >> >> >> >> On Thu, Dec 5, 2013 at 9:23 PM, Colin Alworth <nilo...@gmail.com> wrote: >> >>> I'm still running into trouble with the major version of the compiled >>> classes being 51, so I'm unable to gwt 2.6.0-rc3 to work under jdk 1.6. As >>> before, I was able to confirm that the actual .class files are compiled >>> correctly, but yet I get fatal errors in attempting to run dev mode. >>> Testing so far is on a mac with 1.6.0_65: >>> >>> $ java -version >>> java version "*1.6.0_65*" >>> Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609) >>> Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode) >>> >>> $ javap -v com.google.gwt.core.client.impl.Impl | head >>> Compiled from "Impl.java" >>> public final class com.google.gwt.core.client.impl.Impl extends >>> java.lang.Object >>> SourceFile: "Impl.java" >>> InnerClass: >>> public abstract #77= #76 of #170; //UncaughtExceptionHandler=class >>> com/google/gwt/core/client/GWT$UncaughtExceptionHandler of class >>> com/google/gwt/core/client/GWT >>> minor version: 0 >>> major version: *50* >>> Constant pool: >>> const #1 = Method #61.#163; // java/lang/Object."<init>":()V >>> const #2 = Field #55.#164; // com/google/gwt/core/client/ >>> impl/Impl.unloadSupport:Lcom/google/gwt/core/client/impl/UnloadSupport; >>> >>> When in dev mode, I've seen this error: >>> 22:44:37.233 [ERROR] [com.example.SampleProject] Unable to load module >>> entry point class null (see associated exception for details) >>> java.lang.UnsupportedClassVersionError: com/google/gwt/core/client/impl/Impl >>> : Unsupported major.minor version 51.0 >>> at java.lang.ClassLoader.defineClass1(Native Method) >>> at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) >>> at java.lang.ClassLoader.defineClass(ClassLoader.java:621) >>> at java.lang.ClassLoader.defineClass(ClassLoader.java:471) >>> at com.google.gwt.dev.shell.CompilingClassLoader.findClass( >>> CompilingClassLoader.java:1121) >>> at com.google.gwt.dev.shell.CompilingClassLoader.loadClass( >>> CompilingClassLoader.java:1194) >>> at java.lang.ClassLoader.loadClass(ClassLoader.java:247) >>> at java.lang.Class.forName0(Native Method) >>> at java.lang.Class.forName(Class.java:249) >>> at com.google.gwt.dev.shell.ModuleSpace.loadClassFromSourceName( >>> ModuleSpace.java:670) >>> at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:359) >>> at com.google.gwt.dev.shell.OophmSessionHandler.loadModule( >>> OophmSessionHandler.java:200) >>> at com.google.gwt.dev.shell.BrowserChannelServer.processConnection( >>> BrowserChannelServer.java:526) >>> at com.google.gwt.dev.shell.BrowserChannelServer.run( >>> BrowserChannelServer.java:364) >>> at java.lang.Thread.run(Thread.java:695) >>> >>> When running unit tests in dev mode with HtmlUnit, I've seen this: >>> [ERROR] Unable to load module entry point class null (see associated >>> exception for details) >>> [junit] java.lang.UnsupportedClassVersionError: >>> com/google/gwt/core/client/impl/Impl : Unsupported major.minor version >>> 51.0 >>> [junit] Dec 5, 2013 10:51:41 PM com.gargoylesoftware.htmlunit.WebConsole >>> info >>> [junit] at java.lang.ClassLoader.defineClass1(Native Method) >>> [junit] INFO: /launch error: Failed to load module >>> "com.example.SampleProject.JUnit". >>> [junit] at java.lang.ClassLoader.defineClassCond(ClassLoader. >>> java:637) >>> [junit] Please see the log for details. >>> [junit] at java.lang.ClassLoader.defineClass(ClassLoader.java: >>> 621) >>> [junit] at java.lang.ClassLoader.defineClass(ClassLoader.java: >>> 471) >>> [junit] at com.google.gwt.dev.shell.CompilingClassLoader. >>> findClass(CompilingClassLoader.java:1121) >>> [junit] at com.google.gwt.dev.shell.CompilingClassLoader. >>> loadClass(CompilingClassLoader.java:1194) >>> [junit] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) >>> [junit] at java.lang.Class.forName0(Native Method) >>> [junit] at java.lang.Class.forName(Class.java:249) >>> [junit] at com.google.gwt.dev.shell.ModuleSpace. >>> loadClassFromSourceName(ModuleSpace.java:670) >>> [junit] at com.google.gwt.dev.shell.ModuleSpace.onLoad( >>> ModuleSpace.java:359) >>> [junit] at com.google.gwt.dev.shell.OophmSessionHandler. >>> loadModule(OophmSessionHandler.java:200) >>> [junit] at com.google.gwt.dev.shell.BrowserChannelServer. >>> processConnection(BrowserChannelServer.java:526) >>> [junit] at com.google.gwt.dev.shell.BrowserChannelServer.run( >>> BrowserChannelServer.java:364) >>> [junit] at java.lang.Thread.run(Thread.java:695) >>> >>> It has been driving me nuts trying to track down what mistake I could >>> possibly be making - I've tried explicitly adding -sourceLevel 1.6 to the >>> arguments (which parses correctly, I set breakpoints to avoid the possible >>> null issue reported for java 8), but this hasn't seemed to have any effect. >>> I'm willing to admit user error, but the really odd thing about this is >>> that if I debug com.google.gwt.dev.shell.rewrite.WriteJsoImpl.ForJsoDollar's >>> ctor or com.google.gwt.dev.asm.ClassWriter.toByteArray() I can pick out >>> that some objects have version 49, some have 50, and at least one has 51 >>> (which under java 6 is fatal). Here's the stack at this point, paused on a >>> case where version is 51: >>> >>> ClassWriter.visit(int, int, String, String, String, String[]) line: >>> 657 >>> UseMirroredClasses(ClassVisitor).visit(int, int, String, String, >>> String, String[]) line: 112 >>> RewriteSingleJsoImplDispatches(ClassVisitor).visit(int, int, String, >>> String, String, String[]) line: 112 >>> RewriteSingleJsoImplDispatches.visit(int, int, String, String, String, >>> String[]) line: 144 >>> RewriteRefsToJsoClasses(ClassVisitor).visit(int, int, String, String, >>> String, String[]) line: 112 >>> RewriteJsniMethods(ClassVisitor).visit(int, int, String, String, >>> String, String[]) line: 112 >>> RewriteJsniMethods.visit(int, int, String, String, String, String[]) >>> line: 339 >>> ClassReader.accept(ClassVisitor, Attribute[], int) line: 614 >>> ClassReader.accept(ClassVisitor, int) line: 506 >>> HostedModeClassRewriter.rewrite(TypeOracle, String, byte[], >>> Map<String,String>) line: 251 >>> CompilingClassLoader.findClassBytes(String) line: 1313 >>> CompilingClassLoader.findClass(String) line: 1086 >>> CompilingClassLoader.loadClass(String, boolean) line: 1194 >>> CompilingClassLoader(ClassLoader).loadClass(String) line: 247 >>> Class<T>.forName0(String, boolean, ClassLoader) line: not available >>> [native method] >>> >>> Sure enough, if I back up a few frames to ClassReader.accept:614 and >>> inspect this.b, I see that indeed, something has read out 51 as the version >>> (8th entry in the byte array): >>> [-54, -2, -70, -66, 0, 0, 0, 51, ... >>> >>> A few more steps up to CompilingClassLoader.findClassBytes:1313 shows >>> that this byte array (or an earlier version? I'm not quite clear) comes >>> from line 1278: >>> classBytes = compiledClass.getBytes(); >>> >>> This compiledClass object is an instance of >>> com.google.gwt.dev.javac.CompiledClass, >>> and is where I start to suspect that my workspace is either *really* messed >>> up, or that there is a bug that only hit some users. >>> >>> Inspecting this object shows not a lot directly, but the >>> CompiledClass.unit field has details that make it look like it is from the >>> .gwtar file, a serialized set of Java objects from the precompile process. >>> Inspecting compiledClass.unit.resourceLocation shows it is a string >>> with this value: >>> >>> file:/usr/local/google/home/mdempsky/wd/gwt/user/src/com/ >>> google/gwt/core/client/impl/Impl.java >>> >>> I'm not seeing anything specific in the debugger that points to what is >>> going on - I do see that there is some specific code in >>> com.google.gwt.dev.util.DiskCache.readByteArray(long) that should be >>> reading out the class byte[], but I haven't taken that further apart to see >>> *why* it is reading 51 instead of the expected 50. >>> >>> Modifying the gwt-user jar to not contain any gwtar files, and clearing >>> out the local gwt-unitCache/ dir seems to resolve this, but I only >>> attempted this after beginning this message, so I haven't fully vetted >>> this. Both dev mode and unit tests appear to work correctly however. This >>> does further point to a bug in GWT, at least from my perspective. >>> >>> Can someone else verify that GWT 2.6.0-rc3 behaves correctly with Java 6? >>> >>> I'm using the download from https://code.google.com/p/ >>> google-web-toolkit/downloads/detail?name=gwt-2.6.0-rc3.zip&can=2&q= for >>> this testing. >>> >>> >>> >>> On Thursday, December 5, 2013 9:16:29 AM UTC-6, Thomas Broyer wrote: >>>> >>>> >>>> >>>> On Thursday, December 5, 2013 12:42:29 AM UTC+1, Matthew Dempsky wrote: >>>>> >>>>> FYI, I've just pushed out 2.6.0-rc3, which also includes a workaround >>>>> for the Eclipse plugin version warning. (We decided not to wait for the >>>>> GPE release, and to also be compatible with older GPE versions.) >>>>> >>>>> I'm cautiously optimistic that this should be our last release >>>>> candidate before 2.6.0 final. Please test and let me know if you run into >>>>> any issues. >>>>> >>>> >>>> I haven't investigated yet (really don't have time ATM, and I'm not >>>> sure I could find some before the final release) but it seems like when you >>>> pass "-sourceLevel 1.8" to the Compiler it doesn't fail with the "usage" >>>> help printed to the console, but instead happily sets the source level to >>>> 'null' (as it cannot find a matching enum value) and then fails later with >>>> an NPE. >>>> See https://groups.google.com/d/msg/google-web-toolkit/p9ADH >>>> IfX2A8/-MfMuhoia9UJ >>>> >>>> That was with RC1 and RC2 though, maybe it has changed in RC3 (BTW, >>>> does RC3 has "auto" already?). >>>> >>>> The problem though is that looking at the code for ArgHandlerSource >>>> (now ArgHandlerSourceLevel), I couldn't see anything wrong; which would >>>> mean the issue is in the global handling of CLI arguments :-/ >>>> >>>> -- >>> http://groups.google.com/group/Google-Web-Toolkit-Contributors >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "GWT Contributors" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to google-web-toolkit-contributors+unsubscr...@googlegroups.com >>> . >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> -- > http://groups.google.com/group/Google-Web-Toolkit-Contributors > --- > You received this message because you are subscribed to the Google Groups > "GWT Contributors" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to google-web-toolkit-contributors+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- http://groups.google.com/group/Google-Web-Toolkit-Contributors --- You received this message because you are subscribed to the Google Groups "GWT Contributors" group. 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