TruffleRuby - GraalVM Community Edition 1.0 RC10

New features:

• The nkf and kconv standard libraries were added (#1439).
• Mutex and ConditionVariable have a new fast path for acquiring locks
  that are unlocked.
• Queue and SizedQueue, #close and #closed?, have been implemented.
• Kernel#clone(freeze) has been implemented (#1454).
• Warning.warn has been implemented (#1470).
• Thread.report_on_exception has been implemented (#1476).
• The emulation symbols for Process.clock_gettime have been implemented.

Bug fixes:

• Added rb_eEncodingError for C extensions (#1437).
• Fixed race condition when creating threads (#1445).
• Handle exception: false for IO#write_nonblock (#1457).
• File.expand_path now raises an exception for a non-absolute user-home.
• ArgumentError messages now better match MRI (#1467).
• Added support for :float_millisecond, :millisecond, and
  :second time units to Process.clock_gettime (#1468).
• Fixed backtrace of re-raised exceptions (#1459).
• Updated an exception message in Psych related to loading a non-existing
  class so that it now matches MRI.
• Fixed a JRuby-style Java interop compatibility issue seen in test-unit.
• Fixed problem with calling warn if $stderr has been reassigned.
• Fixed definition of RB_ENCODING_GET_INLINED (#1440).

Changes:

• Timezone messages are now logged at CONFIG level, use -Xlog=CONFIG to
  debug if the timezone is incorrectly shown as UTC.