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https://issues.apache.org/jira/browse/GROOVY-7647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674552#comment-16674552
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Eric Milles commented on GROOVY-7647:
-------------------------------------
I have seen the same issue for methods that rely on default return null and
sometimes for try/catch constructions as well.
{code:groovy}
def m(boolean condition) {
if (condition) {
"something"
}
}
{code}
Debugger moves from if line to "something" line for true or false. This is
because the last line number information for the method is for the "something"
line. There is nothing for either of the closing braces, so the debugger
associates all the bytecodes to the something line.
> Incorrect line information for debug
> ------------------------------------
>
> Key: GROOVY-7647
> URL: https://issues.apache.org/jira/browse/GROOVY-7647
> Project: Groovy
> Issue Type: Bug
> Components: class generator, Compiler
> Affects Versions: 2.4.5
> Reporter: Egor Ushakov
> Priority: Major
>
> Try to debug the code:
> {code}
> boolean boolVar = false; //line 15
> if (boolVar) { // set breakpoint here and step over //line 16
> print "ok"; //line 17
> } // end of file //line 18
> {code}
> It steps over to the line with print even though it is not executed.
> Seems that compiler does not generate line info for the last block (line 18):
> {code}
> public java.lang.Object run();
> descriptor: ()Ljava/lang/Object;
> flags: ACC_PUBLIC
> Code:
> stack=3, locals=3, args_size=1
> 0: invokestatic #18 // Method
> $getCallSiteArray:()[Lorg/codehaus/groovy/runtime/callsite/CallSite;
> 3: astore_1
> 4: iconst_0
> 5: istore_2
> 6: iload_2
> 7: pop
> 8: iload_2
> 9: ifeq 28
> 12: aload_1
> 13: ldc #41 // int 1
> 15: aaload
> 16: aload_0
> 17: ldc #43 // String ok
> 19: invokeinterface #47, 3 // InterfaceMethod
> org/codehaus/groovy/runtime/callsite/CallSite.callCurrent:(Lgroovy/lang/GroovyObject;Ljava/lang/Object;)Ljava/lang/Object;
> 24: areturn
> 25: goto 30
> 28: aconst_null
> 29: areturn
> 30: aconst_null
> 31: areturn
> LocalVariableTable:
> Start Length Slot Name Signature
> 0 30 0 this Lsdfklajsdlkjas/test;
> 6 24 2 boolVar Z
> LineNumberTable:
> line 15: 4
> line 16: 8
> line 17: 12
> {code}
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