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Bug #14702

Updated by makoto_tajitsu@hotmail.co.jp (Makoto Tajitsu) over 2 years ago

On Ruby 2.5.1, when loading file with RubyVM::InstructionSequence.load_from_binary, TracePoint callback event is not working on loaded file. 

 ## Steps to reproduce 

 Ruby version. 
 ``` 
 $ ruby -v 
 # => ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin16] 
 ``` 

 The example with `yomikomu` gem which is simply used `load_iseq` and `load_from_binary` method to load file quickly is following. 
 ```ruby ``` 
 $ YOMIKOMU_AUTO_COMPILE=true bundle exec irb 

 > TracePoint.trace(:line) { |tp| puts tp.lineno if tp.path == '/path/to/somefile.rb' } 
 # => #<TracePoint:enabled> 

 > load '/path/to/somefile.rb' 
 # 3 
 # 4 
 # ... 

 > require 'yomikomu' 

 > load '/path/to/somefile.rb' 
 # no tracepoint callback for line event 
 ``` 

 ## Result of reproduce process 

 tracepoint callback isn't called on loaded file by using load_iseq and load_from_binary. 

 ## Expected result and the reason why you expect 

 tracepoint callback should be called for any loaded file to debug with debugguer(e.g. byebug). 

 On Ruby 2.4.3, this example is working correctly, so tracepoint callback is called and output lineno to stdout when loaded file after `require 'yomikomu'`. 

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