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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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29
test/langtools/tools/javac/patterns/NullsInPatterns.java Normal file
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/*
* @test /nodynamiccopyright/
* @bug 8231827
* @summary Testing pattern matching against the null constant
* @run main NullsInPatterns
*/
import java.util.List;
public class NullsInPatterns {
public static void main(String... args) {
if (null instanceof List t) {
throw new AssertionError("broken");
} else {
System.out.println("null does not match List type pattern");
}
//reifiable types not allowed in type test patterns in instanceof:
// if (null instanceof List<Integer> l) {
// throw new AssertionError("broken");
// } else {
// System.out.println("null does not match List<Integer> type pattern");
// }
if (null instanceof List<?> l) {
throw new AssertionError("broken");
} else {
System.out.println("null does not match List<?> type pattern");
}
}
}