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[tycho-user] Antwort: Re: NullPointerException with Java 9 and Tycho 1.1.0
|
I am not, it was just a try to see if it is
a bug in this specific JDT version and if it would work with another one.
As I said, I didn't follow this path further and am back to the default
JDT version (currently 3.14.0.v20171206-0802, like in eclipse photon M4).
Katrin
Von:
Jeff MAURY <jeffmaury@xxxxxxxxx>
An:
Tycho user list <tycho-user@xxxxxxxxxxx>,
Datum:
14.02.2018 23:05
Betreff:
Re: [tycho-user]
NullPointerException with Java 9 and Tycho 1.1.0
Gesendet von:
tycho-user-bounces@xxxxxxxxxxx
Why are you using a specific version of jdt? It's likely
Java 9 support breaks
Jeff
Le 14 févr. 2018 14:16, "Katrin STRASSL"
<Katrin.STRASSL@xxxxxxxxxxxxxxxxxxxxxxx>
a écrit :
Hi,
I've started migrating our projects to Java 9 / Tycho 1.1.0 and now I get
a NullPointerException during compilation.
[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:1.1.0:compile
(default-compile) on project my.project.name:
Compilation failure: Compilation failure:
[ERROR] D:\workspace\parent_project\my_project\src\main\java\my\project\name\TransactionServiceImpl.java:
[ERROR] package my.project.name;
[ERROR] ^
[ERROR] Internal compiler error: java.lang.NullPointerException
at org.eclipse.jdt.internal.compiler.lookup.BinaryModuleBinding.create(BinaryModuleBinding.java:64)
[ERROR] java.lang.NullPointerException
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.BinaryModuleBinding.create(BinaryModuleBinding.java:64)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getModuleFromAnswer(LookupEnvironment.java:423)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForTypeFromModules(LookupEnvironment.java:363)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:224)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:105)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:215)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:236)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:527)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:586)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInImports(CompilationUnitScope.java:435)
[ERROR] at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInTypes(CompilationUnitScope.java:501)
[ERROR] at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:878)
[ERROR] at org.eclipse.jdt.internal.compiler.ProcessTaskManager.run(ProcessTaskManager.java:141)
[ERROR] at java.base/java.lang.Thread.run(Thread.java:844)
Strangely, the project where the compilation fails is not the first submodule
- the first five or six submodules compile perfectly fine and then on this
module the compiler crashes.
To get closer to the source of the problem I tried the following:
- I manually forced tycho-compiler-plugin to use the previous version of
JDT
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-compiler-plugin</artifactId>
<version>${tycho-version}</version>
<dependencies>
<dependency>
<groupId>org.eclipse.tycho</groupId>
<artifactId>org.eclipse.jdt.core</artifactId>
<version>3.13.50.v20171007-0855</version>
</dependency>
</dependencies>
</plugin>
I am aware that even if this had worked, it would be a suboptimal solution,
but it was worth a try. When I ran the tycho build in an existing workspace,
this configuration actually worked! But on a clean workspace it failed
and complained about Fatal error compiling:
Compliance level '1.4' is incompatible with target level '9'. A compliance
level '9' or better is required because
in the clean workspace there exist no .settings/org.eclipse.jdt.core.prefs.
As ultimately I'd like my projects to compile with "standard"
tycho anyway, I did not follow this path further.
- I discovered that the actual JDT version used by the current tycho release
is 3.14.0.v20171206-0802 and downloaded a fresh eclipse that comes with
exactly this JDT version.
This is the case for eclipse photon M4 (M5 already comes with JDT version
3.15), so I downloaded it and imported my projects. Eclipse does not report
an error and also all JUnit-Tests that use the above mentioned project
run fine.
Actually I had hoped that I could reproduce the error in that eclipse version
and that I could use that to find a solution (maybe it's a project misconfiguration
or similar).
I'm a bit clueless on how to progress from here and what I could try to
pin down the problem further. Please remember that it's not a general problem
but several submodules compile without exception. I could not find an obvious
configuration difference between the working modules and the crashing one.
Does anyone have an idea how to progress? I'm asking here first because
everything seemed to work fine from within eclipse itself. If you need
further information to tackle the problem, I'll be glad to provide it.
Thanks,
Katrin
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