[GROOVY-7647] Incorrect line information for debug

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.5
• Fix Version/s: 2.4.16, 3.0.0-alpha-4, 2.5.5
• Component/s: class generator, Compiler
• Assignee: Paul King
• Reporter: Egor Ushakov
• Created: 26/Oct/15 14:46
• Updated: 29/Jun/20 11:50
• Resolved: 25/Nov/18 20:18

Description

Try to debug the 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

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):

 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

Issue Links

• is duplicated by: GROOVY-7918 Line number debug annotation missing on final return
• is related to: GROOVY-9126 Unreachable line numbers after ARETURN in bytecode
• is related to: GROOVY-9610 Unreachable line numbers after ARETURN in bytecode
• links to: GitHub Pull Request #830