Enum#valueOf thread safety issue #2014
Description
The following snippet sometimes throws ArgumentError: wrong number of arguments (1 for 2):
threads = (0..5).map do
Thread.new { Java::java.util.concurrent.TimeUnit.value_of('NANOSECONDS') }
end
threads.each { |thread| thread.join }
Raw compiled trace (-Xbacktrace.style=raw):
ArgumentError: wrong number of arguments (1 for 2)
getStackTrace at java/lang/Thread.java:1589
getBacktraceData at org/jruby/runtime/backtrace/TraceType.java:175
getBacktrace at org/jruby/runtime/backtrace/TraceType.java:39
prepareBacktrace at org/jruby/RubyException.java:223
preRaise at org/jruby/exceptions/RaiseException.java:213
preRaise at org/jruby/exceptions/RaiseException.java:194
<init> at org/jruby/exceptions/RaiseException.java:110
newRaiseException at org/jruby/Ruby.java:3889
newArgumentError at org/jruby/Ruby.java:3402
findCallableArityOne at org/jruby/java/invokers/RubyToJavaInvoker.java:265
call at org/jruby/java/invokers/StaticMethodInvoker.java:56
call at org/jruby/internal/runtime/methods/AliasMethod.java:69
cacheAndCall at org/jruby/runtime/callsite/CachingCallSite.java:334
call at org/jruby/runtime/callsite/CachingCallSite.java:185
processCall at org/jruby/ir/interpreter/Interpreter.java:307
interpret at org/jruby/ir/interpreter/Interpreter.java:564
INTERPRET_BLOCK at org/jruby/ir/interpreter/Interpreter.java:659
commonYieldPath at org/jruby/runtime/InterpretedIRBlockBody.java:50
call at org/jruby/runtime/IRBlockBody.java:67
call at org/jruby/runtime/Block.java:106
call at org/jruby/RubyProc.java:301
call at org/jruby/RubyProc.java:230
run at org/jruby/internal/runtime/RubyRunnable.java:99
run at java/lang/Thread.java:745
Adding a trace in RubyToJavaInvoker#findCallableArityOne, the looked up method is:
public static java.lang.Enum java.lang.Enum.valueOf(java.lang.Class,java.lang.String)
Tested both on JRuby 1.7.11 and 1.7.16.