`Picked up _JAVA_OPTIONS: -Djava.io.tmpdir=/home/jenkins/tmp` printed in partests

[nicolasstucki]

It looks like when executing partest all tests fail because of Picked up _JAVA_OPTIONS: -Djava.io.tmpdir=/home/jenkins/tmp being printed at the start of each one. I've seen it in #1711 and #1685.

% diff /home/jenkins/workspace/dotty-master-validate-partest-bootstrapped/tests/partest-generated/run/view-headoption-run.log /home/jenkins/workspace/dotty-master-validate-partest-bootstrapped/tests/partest-generated/run/view-headoption.check
% 
@@ -1,4 +1,3 @@
-Picked up _JAVA_OPTIONS: -Djava.io.tmpdir=/home/jenkins/tmp
 fail
 success
 f1: Some(5)

[nicolasstucki]

It has also affected #1700. All PRs that where updated this afternoon.

[smarter]

We have a disabled "filters" file for this, no clue how it's supposed to work: https://github.com/lampepfl/dotty/blob/master/tests/untried/filters#L6

[smarter]

Relevant: https://github.com/scala/scala-partest/blob/7c265b38352f146f941a873b153cbfc22d7b7afd/src/main/scala/scala/tools/partest/nest/Runner.scala#L352-L355

[smarter]

In our case srcDir is tests/partest-generated/ so we have to put the filters file in there somehow

[nicolasstucki]

I still can't reproduce it locally.

[nicolasstucki]

Testing #1714 on CI to see if reverting the PRs merged today has some different results.

[liufengyun]

It also cause test.TestDotc.buildAndRunHelloWorld junit test fail.

[liufengyun]

It can be reproduced as follows:

export _JAVA_OPTIONS=""
sbt "testOnly -- test.TestDotc.buildAndRunHelloWorld"

A related post at SO here.

I guess the settings on Jenkins have changed somehow.

Edited: update cmd to bash syntax

[DarkDimius]

I have a fix available in #1715