Ruby » Ruby master

Bug #16334

Updated by ViugiNick (Nickolay Viuginov) about 5 years ago

I faced a strange distribution of line numbers in bytecode for multiline expressions like this: 
 ``` 
 

 class Test 
   def method1 
     self 
   end 

   def method2 
     self 
   end 

   def method3 
     true 
   end 
 end 
 def hello 
   Test.new #bp here 
       .method1 #bp here 
       .method2 #bp here 
       .method3 #bp here 
 end 
 ``` 
 

 2.3.7 bytecode: 
 ``` 
 == disasm: #<ISeq:hello@/home/viuignick/.RubyMine2019.2/config/scratches/scratch.rb> 
 0000 trace              8                                                 (    14) 
 0002 trace              1                                                 (    18) 
 0004 getinlinecache     11, <is:0>                                        (    15) 
 0007 getconstant        :Test 
 0009 setinlinecache     <is:0> 
 0011 opt_send_without_block <callinfo!mid:new, argc:0, ARGS_SIMPLE>, <callcache>(    16) 
 0014 opt_send_without_block <callinfo!mid:method1, argc:0, ARGS_SIMPLE>, <callcache>(    17) 
 0017 opt_send_without_block <callinfo!mid:method2, argc:0, ARGS_SIMPLE>, <callcache>(    18) 
 0020 opt_send_without_block <callinfo!mid:method3, argc:0, ARGS_SIMPLE>, <callcache> 
 0023 trace              16                                                (    19) 
 0025 leave                                                              (    18) 
 ``` 
 As you can see there is no trace line-event instuction for line №15, because of that debuggers will not stop there. Furthermore call of the method `new` is on the line #16(actually 15), method method1 is on the line 17(actually 16), method2 is on the line 18 (actually 19) 

 2.5.4 bytecode 
 ``` 
 0000 getinlinecache     7, <is:0>                                         (    15)[LiCa] 
 0003 getconstant        :Test 
 0005 setinlinecache     <is:0> 
 0007 opt_send_without_block <callinfo!mid:new, argc:0, ARGS_SIMPLE>, <callcache>(    16) 
 0010 opt_send_without_block <callinfo!mid:method1, argc:0, ARGS_SIMPLE>, <callcache>(    17) 
 0013 opt_send_without_block <callinfo!mid:method2, argc:0, ARGS_SIMPLE>, <callcache>(    18) 
 0016 opt_send_without_block <callinfo!mid:method3, argc:0, ARGS_SIMPLE>, <callcache> 
 0019 leave                                                              (    19)[Re] 
 ``` 
 

 The same situation to 2.5.* 

 for ruby versions > 2.5.0 work fine: 
 ``` 
 == disasm: #<ISeq:hello@/home/viuignick/.RubyMine2019.2/config/scratches/scratch.rb:14 (14,0)-(19,3)> (catch: FALSE) 
 0000 opt_getinlinecache             7, <is:0>                             (    15)[LiCa] 
 0003 getconstant                    :Test 
 0005 opt_setinlinecache             <is:0> 
 0007 opt_send_without_block         <callinfo!mid:new, argc:0, ARGS_SIMPLE>, <callcache> 
 0010 opt_send_without_block         <callinfo!mid:method1, argc:0, ARGS_SIMPLE>, <callcache>(    16) 
 0013 opt_send_without_block         <callinfo!mid:method2, argc:0, ARGS_SIMPLE>, <callcache>(    17) 
 0016 opt_send_without_block         <callinfo!mid:method3, argc:0, ARGS_SIMPLE>, <callcache>(    18) 
 0019 leave                                                              (    19)[Re] 
 ```

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