Eric Milles created GROOVY-10314:
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Summary: finally block produces long sequence of nop instructions
Key: GROOVY-10314
URL: https://issues.apache.org/jira/browse/GROOVY-10314
Project: Groovy
Issue Type: Bug
Components: class generator, Compiler
Reporter: Eric Milles
Consider the following:
{code:groovy}
def test() {
try {
print 'hello'
} finally {
print ' world'
}
}
{code}
For any non-void method where the {{try}}/{{finally}} is part of the return
value, a long sequence of {{nop}} bytecode instructions is produced. The sample
code from GROOVY-4721 produces 18 {{nop}} in a row.
{code}
// Method descriptor #42 ()Ljava/lang/Object;
// Stack: 2, Locals: 3
public java.lang.Object test();
0 aload_0 [this]
1 ldc <String "hello"> [47]
3 invokedynamic 1 invoke(Scratch, java.lang.String) : java.lang.Object
[53]
8 astore_1
9 nop
10 aload_0 [this]
11 ldc <String " world"> [55]
13 invokedynamic 1 invoke(Scratch, java.lang.String) : java.lang.Object
[53]
18 pop
19 nop
20 aload_1
21 areturn
22 nop
23 nop
24 athrow
25 nop
26 nop
27 nop
28 nop
29 nop
30 nop
31 nop
32 nop
33 athrow
34 nop
35 nop
36 athrow
37 astore_2
38 aload_0 [this]
39 ldc <String " world"> [55]
41 invokedynamic 1 invoke(Scratch, java.lang.String) : java.lang.Object
[53]
46 pop
47 aload_2
48 athrow
49 nop
50 athrow
Exception Table:
[pc: 0, pc: 10] -> 37 when : any
[pc: 20, pc: 22] -> 37 when : any
Line numbers:
[pc: 0, line: 3]
[pc: 10, line: 5]
[pc: 49, line: 7]
Local variable table:
[pc: 0, pc: 49] local: this index: 0 type: Scratch
{code}
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