JVM segfault with 9K and -noverify #2566
Description
I tried running the test-suite of one of our larger code-bases against jruby-head, and to my surprise the JVM suddenly segfaulted halfway through.
After some digging, I realized that the crash only happened when running with the option -J-noverify. At some point I put this flag into JRUBY_OPTS in order to improve start-up time. If I remove this flag, I see no crash, and no sign of any problem whatsoever. Similarly, if I run in jruby-1.7 (with or without -J-noverify) everything works well. Is this flag no longer supported by jruby-head?
I'm guessing some part of the new bytecode generation is the cause for the particular issue, and to that end I spent some time reducing thousands of lines of code to the following short snippet. With this snippet I can consistently reproduce the issue:
instance_eval do
begin
raise
rescue
nil
ensure
nil
end
endBeyond this point, I wasn't able to remove any more parts while retaining the segfault. I'm guessing that the next step to understand what is going on here, but I wouldn't really know where to start.