NPE in ruby block called concurrently from Java #6282
Description
Environment Information
- JRuby 9.2.7.0
Expected Behavior
No error when calling ruby block concurrently from Java
I have not been able to reproduce this error locally at all but seems to happen sporadically in our testing pipeline. The failing tests are different but a common pattern is passing a ruby block to java which is called concurrently. An example similar to our tests could be:
results = java.util.concurrent.ConcurrentHashMap.new
calculate_something_in_parallel(input1, input2, -> (id, result) { results[id] = result })The stack trace then indicates that it fails when calling the lambda.
Actual Behavior
Returns an NPE with the following stack trace:
java.lang.NullPointerException
org.jruby.runtime.InterpretedIRBlockBody.commonYieldPath(InterpretedIRBlockBody.java:127)
org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:79)
org.jruby.runtime.Block.call(Block.java:124)
org.jruby.RubyProc.call(RubyProc.java:295)
org.jruby.RubyProc.call(RubyProc.java:274)
org.jruby.RubyProc.call(RubyProc.java:270)
org.jruby.javasupport.Java$ProcToInterface.callProc(Java.java:1131)
org.jruby.javasupport.Java$ProcToInterface.access$300(Java.java:1108)
org.jruby.javasupport.Java$ProcToInterface$ConcreteMethod.call(Java.java:1169)
org.jruby.gen.InterfaceImpl630006984.consume(org/jruby/gen/InterfaceImpl630006984.gen:13)