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Missing LineNumberTable entries with JDK8?
Hi,
I'm currently working on a Java 8 version of the code coverage tool JaCoCo. This tool relies on line number information within class files. Some of our integration tests fail with JDK8, probably due to incomplete line number information.
STEPS TO REPRODUCE
Compile the source file attached with the lates JDK8 build (1.8.0-ea-b97).
EXPECTED
The compiled class files has a LineNumberTable entry for the method invocation b() in line 10.
ACTUAL
There is no separate LineNumberTable entry for the invocation of b(). So b() appears to be invoked in line 8 instead of 10. See javap output below.
The problem seems to be specific to static methods. Line numbers are reported correctly if method b() is an instance method.
Best regards,
-marc
static void m(boolean);
descriptor: (Z)V
flags: ACC_STATIC
Code:
stack=1, locals=1, args_size=1
0: iload_0
1: ifeq 10
4: invokestatic #2 // Method a:()V
7: goto 13
10: invokestatic #3 // Method b:()V
13: return
LineNumberTable:
line 7: 0
line 8: 4
line 12: 13
StackMapTable: number_of_entries = 2
frame_type = 10 /* same */
frame_type = 2 /* same */
/**
* Reproducer for Java 8 compiler issue where wrong line numbers are reported..
*/
public class Target01 {
static void m(boolean flag) {
if (flag) {
a();
} else {
b(); // Wrong line number for this invocation (8 instead of 10)
}
}
static void a() {
}
static void b() {
}
}
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