Prepending a module to a module extended by a class gives NPE when calling super #4678
Description
jruby 9.1.12.0 (2.3.3) 2017-06-15 33c6439 Java HotSpot(TM) 64-Bit Server VM 25.112-b16 on 1.8.0_112-b16 +jit [darwin-x86_64]
Darwin Gratass.local 16.6.0 Darwin Kernel Version 16.6.0: Fri Apr 14 16:21:16 PDT 2017; root:xnu-3789.60.24~6/RELEASE_X86_64 x86_64
Given the following code:
module A
def self.included(clazz)
clazz.extend ClassMethods
end
module ClassMethods
def foo
puts 'super'
end
end
end
class B
include A
end
module C
def foo
super
end
end
A::ClassMethods.prepend C
B.fooJRuby 9.1.12.0 gives the following stack trace:
Unhandled Java exception: java.lang.NullPointerException
java.lang.NullPointerException: null
unresolvedSuper at org/jruby/ir/runtime/IRRuntimeHelpers.java:1014
invokeSuper6:-unknown-super-target- at jruby_example.rb:19
foo at jruby_example.rb:19
call at org/jruby/internal/runtime/methods/CompiledIRMethod.java:155
cacheAndCall at org/jruby/runtime/callsite/CachingCallSite.java:318
call at org/jruby/runtime/callsite/CachingCallSite.java:131
invokeOther10:foo at jruby_example.rb:24
<main> at jruby_example.rb:24
invokeWithArguments at java/lang/invoke/MethodHandle.java:627
load at org/jruby/ir/Compiler.java:95
runScript at org/jruby/Ruby.java:827
runNormally at org/jruby/Ruby.java:746
runNormally at org/jruby/Ruby.java:764
runFromMain at org/jruby/Ruby.java:577
doRunFromMain at org/jruby/Main.java:417
internalRun at org/jruby/Main.java:305
run at org/jruby/Main.java:232
main at org/jruby/Main.java:204
With MRI 2.4.1 it prints "super".