javap cannot read module-info.class

[Stephan Herrmann]

One working example certainly doesn't prove absence of a bug :)
But yes, I must have gotten my bash aliases wrong, the reported error
is only printed by the Java 8 version of javap, in 9 it works as expected.

One small bit remains:
If I let our compiler emit CONSTANT_Utf8_info for the module name
without a wrapper CONSTANT_Module_info javap does happily accept this.
"java --list-modules" rejects this, though.

other than that: sorry for the noise,
Stephan

On 01.07.2017 18:01, Remi Forax wrote:
> Hi Stephan,
> there is something wrong from your side, it works for me :)
> 
> /usr/jdk/jdk-9-b175/bin/javap --module-path target/main/exploded/ --module fr.umlv.asm.test module-info
> Compiled from "module-info.java"
> module fr.umlv.asm.test {
>    requires java.base;
>    requires org.objectweb.asm.all.debug;
>    exports fr.umlv.asm.test;
> }
> 
> /usr/jdk/jdk-9-b175/bin/javap -m java.base module-info
> Compiled from "module-info.java"
> module java.base at 9 {
>    exports sun.reflect.generics.reflectiveObjects to
>      java.desktop;
>    exports java.util;
>    exports java.lang.ref;
>    exports jdk.internal.misc to
>      java.rmi,
>      java.sql,
>      jdk.jshell,
> ...
> 
> cheers,
> Rémi
> 
> ----- Mail original -----
>> De: "Stephan Herrmann" <stephan.herrmann at berlin.de>
>> À: jigsaw-dev at openjdk.java.net
>> Envoyé: Samedi 1 Juillet 2017 17:08:20
>> Objet: javap cannot read module-info.class
> 
>> compile an arbitrary module-info.java and then:
>>
>> $ javap module-info.class
>>   Error: error while reading constant pool for /tmp/bin/module-info.class:
>>   unexpected tag at #5: 19
>>
>>  From tweaking the Eclipse compiler it seems that javap is expecting a
>> CONSTANT_Utf8_info,
>> where according to JVMS 4.7.25 a CONSTANT_Module_info is required.
>>
>> JVMS and javac agree, so javap is the odd man out.
>>
>> Stephan
>>
>> PS: build is 9+175