[
https://issues.apache.org/jira/browse/KAFKA-9665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
David Arthur updated KAFKA-9665:
--------------------------------
Description:
While reviewing KAFKA-9661, I wondered about the compiler giving us a warning
for unused locals. I ran the build locally and didn't see any warnings. Turns
out Scala 2.12 doesn't support the compiler flag {{-Xlint:unused}}. Since we
build with 2.12 by default, we can easily miss these warnings.
We should instead use {{-Ywarn-unused:locals}} and others which work for scalac
2.12 and 2.13.
was:
While reviewing KAFKA-9661, I wondered about the compiler giving us a warning
for unused locals. I ran the build locally and didn't see any warnings. Turns
out Scala 2.12 doesn't support the compiler flag {{-Xlint:unused}}. Since we
build with 2.12 by default, we can easily miss these warnings.
We should instead use {{-Ywarn-unused:locals}} which works for scalac 2.12 and
2.13.
> Scala compiler not producing unused warnings
> --------------------------------------------
>
> Key: KAFKA-9665
> URL: https://issues.apache.org/jira/browse/KAFKA-9665
> Project: Kafka
> Issue Type: Bug
> Components: build
> Reporter: David Arthur
> Assignee: David Arthur
> Priority: Minor
>
> While reviewing KAFKA-9661, I wondered about the compiler giving us a warning
> for unused locals. I ran the build locally and didn't see any warnings. Turns
> out Scala 2.12 doesn't support the compiler flag {{-Xlint:unused}}. Since we
> build with 2.12 by default, we can easily miss these warnings.
> We should instead use {{-Ywarn-unused:locals}} and others which work for
> scalac 2.12 and 2.13.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
