Ewa Śliwińska created MCOMPILER-375:
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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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