ASM 8.0 does not preserve empty Record attribute in absence of record components #1037
Description
For following Example.java
record Example() {
public static void main(String[] args) {
System.out.println(Example.class.isRecord());
System.out.println(Example.class.getRecordComponents().length);
}
}
execution of
javac --release 14 --enable-preview Example.java
java -javaagent:jacocoagent.jar --enable-preview Example
using JaCoCo 0.8.5 prints
true
0
while using JaCoCo 0.8.6-SNAPSHOT
false
Exception in thread "main" java.lang.NullPointerException
at Example.main(Example.java:4)
Class file instrumented by 0.8.5 contains empty Record attribute, while class file instrumented by 0.8.6-SNAPSHOT does not - see output of
java -jar jacoco-0.8.5/lib/jacococli.jar instrument Example.class --dest before
java -jar jacoco-0.8.6-20200329.124051-45/lib/jacococli.jar instrument Example.class --dest after
javap -v -p before/Example.class > before.txt
javap -v -p after/Example.class > after.txt
diff before.txt after.txt
This regression was introduced by the upgrade of ASM to 8.0 (#1032) - see https://mail.ow2.org/wws/arc/asm/2020-03/msg00001.html
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