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From Ewa Śliwińska (JIRA) <j...@apache.org>
Subject [jira] [Created] (MCOMPILER-375) can't use release tag on Ubuntu
Date Fri, 15 Feb 2019 12:24:00 GMT
Ewa Śliwińska created MCOMPILER-375:
---------------------------------------

             Summary: can't use release tag on Ubuntu
                 Key: MCOMPILER-375
                 URL: https://issues.apache.org/jira/browse/MCOMPILER-375
             Project: Maven Compiler Plugin
          Issue Type: Bug
    Affects Versions: 3.5
         Environment:  Maven 3.5.2 on Ubuntu 18.04 with Java 10
            Reporter: Ewa Śliwińska


I want to configure my Maven project to use Java 8.

Normally I do it by pasting
{code:java}
<build>
  <plugins>
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>3.8.0</version>
      <configuration>
        <release>8</release>
      </configuration>
    </plugin>
  </plugins>
</build>{code}
into POM, and this works fine on Maven 3.5.4 on Windows 10 with Java 8.

But when I tried to compile it using Maven 3.5.2 on Ubuntu 18.04 with Java 10, it says *invalid
flag: --release*. I'm not sure when this tag was introduces, I have problems containing information
about it.
----
Nevertheless, I don't mind (that much) using _source_ and _target_ instead of _release._
I tried it, but then I can't compile my project because of the error related to Google Guava
Table:
{code:java}
[ERROR] /C:/Users/kresk/git/boundtest/src/main/java/Example.java:[23,61] incompatible types:
inferred type does not conform to upper bound(s)
[ERROR] inferred: com.google.common.collect.Table<java.lang.Object,java.lang.Object,java.lang.Object>
[ERROR] upper bound(s): com.google.common.collect.Table<java.lang.Object,java.lang.Object,java.lang.Object>,com.google.common.collect.Table<?
extends java.lang.Integer,? extends java.lang.Integer,? extends java.lang.Integer>,java.lang.Object{code}
I can't figure out how it's related, the only thing I know is it just compiles when using
_release_ tag.

This is the code causing error:


{code:java}
final Table<Integer, Integer, Integer> destination = HashBasedTable.create();
final Map<Integer, Integer> source = new HashMap<>();

// compiles
final Table<Integer, Integer, Integer> broker =
source.entrySet().stream().collect( Tables.toTable( e -> 0, e -> 0, e -> 0,
( e1, e2 ) -> null, HashBasedTable::create ) );
destination.putAll( broker );

// doesn't compile
destination.putAll( source.entrySet().stream().collect( Tables.toTable( e -> 0, e ->
0,
e -> 0, ( e1, e2 ) -> null, HashBasedTable::create ) ) );
{code}
Like I said, I'm not sure how it's related and I would like to focus on _release_ tag problem
here. I just attached it in case of it may help you in any way.

{color:#cccccc}Side note: please add 3.5.2 Maven version to the list of available in Jira
versions. Currently it says there is no version like this.{color}
{color:#cccccc}After you do that, please set this bug version to 3.5.2 and delete this side
note.{color}

 



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