Double stack traces with rewrite.java.trace enabled

musicdenotation · May 14, 2014, 9:05pm

I was looking at an example for the rewrite.java.trace:

gist.github.com

https://gist.github.com/headius/bea2377f81c6e4868ff3

gistfile1.txt

system ~/projects/jruby $ jruby -Xrewrite.java.trace=true -X-C run_blah.rb
Blah.java:3:in `go': java.lang.Exception
	from java/lang/reflect/Method.java:597:in `invoke'
	from run_blah.rb:6:in `bar'
	from run_blah.rb:2:in `foo'
	from run_blah.rb:9:in `(root)'

system ~/projects/jruby $ jruby -X-C run_blah.rb
Blah.java:3:in `go': java.lang.Exception
	from NativeMethodAccessorImpl.java:-2:in `invoke0'

This file has been truncated. show original

The example command is:

jruby -Xrewrite.java.trace=true -X-C run_blah.rb

This works great. However if I do not disable compilation (using the
-X-C option) then the stack trace is duplicated. Check out this forked
gist:

gist.github.com

https://gist.github.com/peter-ryan/0ad175ddc3faf7a4b0b2

gistfile1.txt

Why does this produce duplicate lines when the -X-C flag is omitted?

jruby -Xrewrite.java.trace=true run_blah.rb 
Blah.java:4:in `go': java.lang.RuntimeException: barf
	from java/lang/reflect/Method.java:606:in `invoke'
	from run_blah.rb:6:in `bar'
	from run_blah.rb:6:in `bar'
	from run_blah.rb:2:in `foo'
	from run_blah.rb:2:in `foo'
	from run_blah.rb:9:in `(root)'

This file has been truncated. show original

In it the stack trace reported is repeating lines:

from java/lang/reflect/Method.java:606:in invoke' from run_blah.rb:6:in bar’
from run_blah.rb:6:in bar' from run_blah.rb:2:in foo’
from run_blah.rb:2:in foo' from run_blah.rb:9:in (root)’
from run_blah.rb:9:in `(root)’

Does anyone know why the stack trace is double printing?

Thanks in advance,

Peter