jdk

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/*
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 * @test /nodynamiccopyright/
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 * @bug 8254274 8258421
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 * @summary lint should warn when an instance of a value based class is synchronized upon
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 * @compile/fail/ref=ExternalAbuseOfVbc.out -XDrawDiagnostics -Werror -Xlint ExternalAbuseOfVbc.java
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 * @compile/fail/ref=ExternalAbuseOfVbc.out -XDrawDiagnostics -Werror -Xlint:all ExternalAbuseOfVbc.java
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 * @compile/fail/ref=ExternalAbuseOfVbc.out -XDrawDiagnostics -Werror -Xlint:synchronization ExternalAbuseOfVbc.java
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 * @compile/fail/ref=ExternalAbuseOfVbc.out --release 16 -XDrawDiagnostics -Werror -Xlint:synchronization ExternalAbuseOfVbc.java
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 * @compile/ref=LintModeOffAbuseOfVbc.out -XDrawDiagnostics -Werror -Xlint:-synchronization ExternalAbuseOfVbc.java
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 */
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public final class ExternalAbuseOfVbc {
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    final Integer val = Integer.valueOf(42);
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    final String ref = "String";
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    void abuseVbc() {
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        synchronized(ref) {      // OK
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            synchronized (val) { // WARN
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            }
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        }
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    }
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}
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