Rails 5 dependencies fail to load 'listen' lib for evented file checking #3823
Description
Issue #3733, after some patching, proceeds on to a new error when trying to boot a Rails 5 console. The error appears to happen when trying to load the 'listen' library lazily:
$ JRUBY_OPTS='-X-C -Xbacktrace.style=full' rails c
LoadError: no such file to load -- listen
getStackTrace at java/lang/Thread.java:1552
getBacktraceData at org/jruby/runtime/backtrace/TraceType.java:215
getBacktrace at org/jruby/runtime/backtrace/TraceType.java:47
prepareBacktrace at org/jruby/RubyException.java:225
preRaise at org/jruby/exceptions/RaiseException.java:229
preRaise at org/jruby/exceptions/RaiseException.java:196
<init> at org/jruby/exceptions/RaiseException.java:111
newRaiseException at org/jruby/Ruby.java:4066
newLoadError at org/jruby/Ruby.java:3916
requireCommon at org/jruby/runtime/load/LoadService.java:414
require at org/jruby/runtime/load/LoadService.java:392
requireCommon at org/jruby/RubyKernel.java:944
require19 at org/jruby/RubyKernel.java:937
call at org/jruby/internal/runtime/methods/JavaMethod.java:579
call at org/jruby/internal/runtime/methods/AliasMethod.java:101
call at org/jruby/internal/runtime/methods/AliasMethod.java:101
unresolvedSuper at org/jruby/ir/runtime/IRRuntimeHelpers.java:965
interpret at org/jruby/ir/instructions/ZSuperInstr.java:71
processCall at org/jruby/ir/interpreter/InterpreterEngine.java:348
interpret at org/jruby/ir/interpreter/InterpreterEngine.java:161
INTERPRET_BLOCK at org/jruby/ir/interpreter/Interpreter.java:132
block in require at /Users/headius/projects/jruby/lib/ruby/gems/shared/gems/activesupport-5.0.0.beta3/lib/active_support/dependencies.rb:302
yieldDirect at org/jruby/runtime/InterpretedIRBlockBody.java:109
yieldSpecific at org/jruby/runtime/IRBlockBody.java:73
yieldSpecific at org/jruby/runtime/Block.java:135
yieldSpecific at org/jruby/ir/runtime/IRRuntimeHelpers.java:480
interpret at org/jruby/ir/instructions/YieldInstr.java:73
processOtherOp at org/jruby/ir/interpreter/InterpreterEngine.java:550
interpret at org/jruby/ir/interpreter/InterpreterEngine.java:203
interpret at org/jruby/ir/interpreter/InterpreterEngine.java:86
INTERPRET_METHOD at org/jruby/internal/runtime/methods/InterpretedIRMethod.java:189
load_dependency at /Users/headius/projects/jruby/lib/ruby/gems/shared/gems/activesupport-5.0.0.beta3/lib/active_support/dependencies.rb:268
call at org/jruby/internal/runtime/methods/InterpretedIRMethod.java:180
cacheAndCall at org/jruby/runtime/callsite/CachingCallSite.java:323
callBlock at org/jruby/runtime/callsite/CachingCallSite.java:173
call at org/jruby/runtime/callsite/CachingCallSite.java:177
processCall at org/jruby/ir/interpreter/InterpreterEngine.java:325
interpret at org/jruby/ir/interpreter/InterpreterEngine.java:161
interpret at org/jruby/ir/interpreter/InterpreterEngine.java:86
INTERPRET_METHOD at org/jruby/internal/runtime/methods/InterpretedIRMethod.java:189
require at /Users/headius/projects/jruby/lib/ruby/gems/shared/gems/activesupport-5.0.0.beta3/lib/active_support/dependencies.rb:302
call at org/jruby/internal/runtime/methods/InterpretedIRMethod.java:180
call at org/jruby/internal/runtime/methods/DynamicMethod.java:197
cacheAndCall at org/jruby/runtime/callsite/CachingCallSite.java:313
call at org/jruby/runtime/callsite/CachingCallSite.java:163
processCall at org/jruby/ir/interpreter/InterpreterEngine.java:316
interpret at org/jruby/ir/interpreter/StartupInterpreterEngine.java:77
INTERPRET_BLOCK at org/jruby/ir/interpreter/Interpreter.java:132
block in initialize at /Users/headius/projects/jruby/lib/ruby/gems/shared/gems/activesupport-5.0.0.beta3/lib/active_support/evented_file_update_checker.rb:24
Here's the lines that trigger the lazy require, in `active_support/evented_file_update_checker.rb
if (dtw = directories_to_watch).any?
# Loading listen triggers warnings. These are originated by a legit
# usage of attr_* macros for private attributes, but adds a lot of noise
# to our test suite. Thus, we lazy load it and disable warnings locally.
silence_warnings { require 'listen' }
Listen.to(*dtw, &method(:changed)).start
end
endAnd the lines in dependencies.rb that do the load:
def require(file)
result = false
load_dependency(file) { result = super }
result
endThe super call here is not able to eventually find anything to require for listen. The only instance of listen.rb I could find in Rails 5 dependencies was vendored into sass and does not appear to be loadable...so I'm confused.