[build][test] EncodingTests .testBug361356b fails with message: Sources should not be decoded the same way

[mpalat]

in https://download.eclipse.org/eclipse/downloads/drops4/I20241015-1820/testresults/html/org.eclipse.jdt.core.tests.model_ep434I-unit-win32-java17_win32.win32.x86_64_17.html

org.eclipse.jdt.core.tests.model.EncodingTests | testBug361356b | Failure | Sources should not be decoded the same way

junit.framework.AssertionFailedError: Sources should not be decoded the same wayat junit.framework.Assert.fail(Assert.java:57)at junit.framework.Assert.assertTrue(Assert.java:22)at junit.framework.Assert.assertFalse(Assert.java:39)at junit.framework.TestCase.assertFalse(TestCase.java:208)at org.eclipse.jdt.core.tests.model.EncodingTests.testBug361356b(EncodingTests.java:1429)at java.base/java.lang.reflect.Method.invoke(Method.java:568)at junit.framework.TestCase.runTest(TestCase.java:177)at org.eclipse.jdt.core.tests.junit.extension.TestCase.runTest(TestCase.java:970)at junit.framework.TestCase.runBare(TestCase.java:142)at junit.framework.TestResult$1.protect(TestResult.java:122)at junit.framework.TestResult.runProtected(TestResult.java:142)at junit.framework.TestResult.run(TestResult.java:125)at junit.framework.TestCase.run(TestCase.java:130)at junit.framework.TestSuite.runTest(TestSuite.java:241)at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite.runTest(SuiteOfTestCases.java:114)at junit.framework.TestSuite.run(TestSuite.java:236)at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite.superRun(SuiteOfTestCases.java:97)at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite$1.protect(SuiteOfTestCases.java:85)at junit.framework.TestResult.runProtected(TestResult.java:142)at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite.run(SuiteOfTestCases.java:94)at junit.framework.TestSuite.runTest(TestSuite.java:241)at junit.framework.TestSuite.run(TestSuite.java:236)
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Further info:

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=414844
• https://bugs.eclipse.org/bugs/show_bug.cgi?id=399351
• [build][test] EncodingTests#test021 Fails in build #364