Cannot sub-class Zlib::GzipWriter and call .wrap #7479
Description
require 'zlib'
class ZlibGzipWriterSubClass < Zlib::GzipWriter
end
string = ZlibGzipWriterSubClass.wrap('')Environment Information
jruby 9.4.0.0 (3.1.0) 2022-11-23 95c0ec159f OpenJDK 64-Bit Server VM 17.0.5+8 on 17.0.5+8 +jit [x86_64-linux]Linux dev 6.0.9-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Nov 16 17:50:45 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Expected Behavior
Returns an ZlibGzipWriterSubClass object.
Actual Behavior
org.jruby.dist/org.jruby.ext.zlib.JZlibRubyGzipReader.newInstance(JZlibRubyGzipReader.java:84): class org.jruby.ext.zlib.JZlibRubyGzipWriter cannot be cast to class org.jruby.ext.zlib.JZlibRubyGzipReader (org.jruby.ext.zlib.JZlibRubyGzipWriter and org.jruby.ext.zlib.JZlibRubyGzipReader are in module org.jruby.dist of loader 'app') (Java::JavaLang::ClassCastException)
from org.jruby.dist/org.jruby.ext.zlib.RubyGzipFile.wrap19(RubyGzipFile.java:94)
from org.jruby.dist/org.jruby.ext.zlib.RubyGzipFile$INVOKER$s$0$1$wrap19.call(RubyGzipFile$INVOKER$s$0$1$wrap19.gen)
from org.jruby.dist/org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:224)
from org.jruby.dist/org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:220)
from org.jruby.dist/org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:372)
from org.jruby.dist/org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:175)
from org.jruby.dist/org.jruby.ir.interpreter.InterpreterEngine.processCall(InterpreterEngine.java:314)
from org.jruby.dist/org.jruby.ir.interpreter.StartupInterpreterEngine.interpret(StartupInterpreterEngine.java:66)
from org.jruby.dist/org.jruby.ir.interpreter.Interpreter.INTERPRET_EVAL(Interpreter.java:106)
from org.jruby.dist/org.jruby.ir.interpreter.Interpreter.evalCommon(Interpreter.java:157)
from org.jruby.dist/org.jruby.ir.interpreter.Interpreter.evalWithBinding(Interpreter.java:182)
from org.jruby.dist/org.jruby.RubyKernel.evalCommon(RubyKernel.java:1181)
from org.jruby.dist/org.jruby.RubyKernel.eval(RubyKernel.java:1143)
from org.jruby.dist/org.jruby.RubyKernel$INVOKER$s$0$3$eval.call(RubyKernel$INVOKER$s$0$3$eval.gen)
from org.jruby.dist/org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:85)
from org.jruby.dist/org.jruby.ir.instructions.CallBase.interpret(CallBase.java:561)
... 256 levels...