JobGroupTest.testShouldCancel_4 failed in I-build

[trancexpress]

See: https://download.eclipse.org/eclipse/downloads/drops4/I20260518-1800/testresults/html/org.eclipse.core.tests.runtime_ep440I-unit-macosx-x86_64-java21_macosx.cocoa.x86_64_21.html

	expected: <true> but was: <false>

org.opentest4j.AssertionFailedError: expected: <true> but was: <false>
at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
at org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:31)
at org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:183)
at org.eclipse.core.tests.runtime.jobs.JobGroupTest.testShouldCancel_4(JobGroupTest.java:1280)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1596) 

[trancexpress]

This code seems to be called from multiple jobs:

numShouldCancelCalled[0]++;

Maybe it should be an AtomicInteger in that case. Currently its just an int.