Exception starting new thread after set_trace_func call #1355
Description
Consider following code sample
set_trace_func proc { |event, file, line, obj, binding, clazz| }
Thread.new do
puts "hello"
endIn 1.9 mode it works ok and exits after printing hello. In 2.0 mode, it throws following exception:
Exception in thread "RubyThread-2: /Users/denofevil/RubymineProjects/debug_test/jruby_debug.rb:2" java.lang.ArrayIndexOutOfBoundsException: -1
at org.jruby.runtime.ThreadContext.getCurrentFrame(ThreadContext.java:447)
at org.jruby.runtime.ThreadContext.getFrameKlazz(ThreadContext.java:586)
at org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:96)
at java.lang.Thread.run(Thread.java:695)
This issue greatly affects debugging JRuby in 2.0 mode and it was originally reported in RubyMine tracker against 1.7.8, but it seems that the problem was introduced earlier as mentioned in ruby-debug/ruby-debug-ide#37