Failed

org.eclipse.jdt.core.tests.compiler.regression.GenericsRegressionTest_1_8.testBug494733_comment0 - 1.8 (from org.eclipse.jdt.core.tests.compiler.regression.TestAll)

Error Message

testBug494733_comment0 - Eclipse found error(s) but Javac did not find any.
----------- Expected ------------

------------ but was ------------
----------\n
1. ERROR in X.java (at line 5)\n
 Set<List<Number>> numbetListSet = Collections.singleton(toWildcardGeneric(integerList));\n
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n
Type mismatch: cannot convert from Set<List<Integer>> to Set<List<Number>>\n
----------\n

--------- Difference is ----------
 expected:<[]> but was:<[----------\n
1. ERROR in X.java (at line 5)\n
 Set<List<Number>> numbetListSet = Collections.singleton(toWildcardGeneric(integerList));\n
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n
Type mismatch: cannot convert from Set<List<Integer>> to Set<List<Number>>\n
----------\n
]>

Stacktrace

junit.framework.ComparisonFailure: 
testBug494733_comment0 - Eclipse found error(s) but Javac did not find any.
----------- Expected ------------

------------ but was ------------
----------\n
1. ERROR in X.java (at line 5)\n
	Set<List<Number>> numbetListSet = Collections.singleton(toWildcardGeneric(integerList));\n
	                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n
Type mismatch: cannot convert from Set<List<Integer>> to Set<List<Number>>\n
----------\n

--------- Difference is ----------
 expected:<[]> but was:<[----------\n
1. ERROR in X.java (at line 5)\n
	Set<List<Number>> numbetListSet = Collections.singleton(toWildcardGeneric(integerList));\n
	                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n
Type mismatch: cannot convert from Set<List<Integer>> to Set<List<Number>>\n
----------\n
]>
	at org.eclipse.jdt.core.tests.compiler.regression.GenericsRegressionTest_1_8.testBug494733_comment0(GenericsRegressionTest_1_8.java:8142)

Standard Output

org.eclipse.jdt.core.tests.compiler.regression.GenericsRegressionTest_1_8#testBug494733_comment0 - 1.8
X.java [
import java.util.*;
public class X {
	public static void main(String[] args) {
        List<Integer> integerList = new ArrayList<>();
        Set<List<Number>> numbetListSet = Collections.singleton(toWildcardGeneric(integerList));
        numbetListSet.iterator().next().add(Float.valueOf(1.0f));
        Integer i = integerList.get(0); // Throws ClassCastException
    }
    
    static <T> List<? extends T> toWildcardGeneric(List<T> l) {
        return l;
    }
}

]


Full results sent to /home/jenkins/agent/workspace/eclipse.jdt.core-run.javac-1.8/tmp/comptest/run.1584479137560/1.8.0_202_20200317_210541.txt

Standard Error

----------------------------------------