User visible changes in mruby3.3 from mruby3.2

"NOTE:" are changes to be aware of.

The language

• aliases work properly with super (2ad3f0e)
• callee method work differently with aliases in mruby (f2dc76e)
• define Kernel#respond_to_missing? method (347586e)
• _inspect method (inspect with recursive check) is removed (e2bbf75, 5cb0c74, 113565a, 0713f2a, 6ae6b63, fc9fffc)
• __printstr__ method is removed; use print instead (acecee0, 192e6e3)
• New method String#bytesplice (5274647, a2e2e83)
• Allow return in blocks to cross C boundaries (#6125)

Configuration

• mruby can be built using Docker now. Try docker-compose build for example. (#5961)
• New Platform: DJGPP (MS-DOS) (#6022)
• New Platform: Nintendo Wii (#6086)
• Improved Platform: Android (#6013)
• Improved Platform: Dreamcast (#6130)
• Allow tests to be disabled for specific gems; warn about disabled tests (#6012)
• Replace MRB_NO_DIRECT_THREADING with MRB_USE_VM_SWITCH_DISPATCH (#5902)

mruby memory API

• mrb_default_allocf can be overridden by the application (34c5d96)
• mrb_open_allocf will be deprecated (cfee5c2)

Changes in C API

• add new error handling API functions (8c8bbd9)

• Add mrb_vm_ci_env_clear() function with MRB_API (#5945)

• a new function mrb_check_frozen_value() (ccdf75c)

• avoid formatting in mrb_bug() (82a48bd)

  NOTE: If you are using it, you must give a simple string or replace it with a call to mrb_raise() series.

• stop using mrbc_ prefix for compiler context (c5e3cbe)

  The same names are provided as before, but we recommend replacing them.

• Allow Class#allocate to be prohibited (#5979, #6122, #6123)

  To disable #allocate, use MRB_UNDEF_ALLOCATOR(). This is also automatically applied when the subclass is created, but to explicitly allow it, use MRB_DEFINE_ALLOCATOR().

Changes in mrbgems

• default.gembox: Add mruby debugger mrdb (mruby-bin-debugger) (#5966)

• mruby-bin-config: new options --cxx, --cxxflags, --as, --asflags, --objc, --objcflags (#6054)

• mruby-binding: renamed from mruby-binding-core of mruby3.2 (11af5db)

  NOTE: If using mruby-binding-core of mruby 3.2, replace it with mruby-binding.

• mruby-binding: implemented Binding#initialize_copy method (#5517)

• mruby-binding: Kernel#binding responds only to calls from Ruby (#5981)

• mruby-compar-ext: Comparable#clamp to accept nil as arguments (836bebc)

• mruby-compiler: add print name for identifier tokens (d7b2e3a)

• mruby-data: allow empty Data (927a9df)

• mruby-enumerator: remove internal attribute methods obj, args, kwd, meth, fib. (735fa24)

• mruby-enumerator: add Enumerator#size (861f8bd)

• mruby-eval: merged mruby-binding of mruby3.2 (501b22a, #5989)

  NOTE: If using mruby-binding of mruby 3.2, replace it with mruby-eval.

• mruby-fiber: Add a new mrb_fiber_new() with MRB_API (#6097)

• mruby-fiber: Allows calling Fiber#resume from C (#6106)

• mruby-fiber: Fiber#to_s format changed (#6105)

• mruby-io: add File#atime and File#ctime (321cfe9)

• mruby-io: Add "x" mode option for IO.open (#6081)

• mruby-io: File.new should not take blocks (53de964)

• mruby-method: Method#to_s format changed (f5bc82f, 02f189c)

• mruby-numeric-ext: int.pow(n,m) to take bigint as exponential (d482eab)

• mruby-pack: support new directives j, J, b, B, # (2a1e3a5, e7021f1, e17f325)

• mruby-range-ext: new method Range#overlap? (384d0e2)

• mruby-string-ext: Add String#valid_encoding? method (eabe2d9)

• mruby-struct: allow empty Struct when a name is not given (c212ede)

• mruby-time: should allow year before 1900 (e5de08b)

• mruby-time: support bigint to time_t if necessary (7096d27)

• mruby-time: need to handle negative time_t (b064d7e)

Changes in build system

• Extended rake install task (#5928)

  NOTE: Due to this impact, executable files in the mruby/bin/ directory by default are now symbolic links (batch files on Windows). If previously relied on those executables, should be replaced with direct references to the entity created under the build directory (e.g. mruby/build/host/bin/).

• Encode and decode escape characters for presym (#6011)

• Rakefile: remove default build target directories in deep_clean (#6032, 1e38569)

Other breaking changes

• mrb_f_raise() is now an internal function (#5923, #6070)
• mrb_make_exception() is now an internal function with different parameters (431f83e, 78137f3)
• The File#path method no longer uses the #to_path method for implicit conversion (d86c4a7)
• stop mrb isolation for each test file (a20fbe5)
• RBreak remembers the CI location (#6103)

Bugs Fixed

• #5724 Rational#** is missing
• #5725 weird const_missing exceptions in mrblib code
• #5789 No memory release of backtrace information due to stack error
• #5932 How to create a block using the C API? mrb_yield keeps crashing!
• #5943 TCPSocket#write is failed
• #5944 Behavior of calling method with a hash variable
• #5946 Don't switch constant search path from modules to Object
• #5949 Caller appears to report wrong line when block passed and brackets omitted
• 0906cd7 numeric.c: fix rounding function issues with big numbers
• #5974 Invalid escape sequences in gem_init.c on windows
• #5975 Equals comparison fails on extreme ends of 64-bit integers
• #5985 Sign extension with OP_LOADI32 in get_int_operand()
• #5986 Fix bugs in String#bytesplice
• #5987 ~(-1 << 64) is incorrect
• #5991 'gets' method not working in mruby-3.2.0
• #5994 fix typo in mrbgems/mruby-io/src/io.c
• #5995 One seemingly unnecessary parameter is passed in the block parameters
• #6008 Make "bintest" independent of directory
• b47c8b7 gc.c (clear_all_old): fix a generational GC bug
• #6029 mruby build fails under mrbgems directory
• a264965 mruby-os-memsize/memsize.c: fix irep size calculation
• 3310e10 mruby-test/mrbgem.rake: fix mrb_state handling bug
• #6041 GC Performance may have degraded
• #6044 Generated presym/table.h contains invalid characters
• #6051 Null pointer dereference in mrb_addrinfo_unix_path
• #6052 Null pointer dereference while handling the Proc class
• #6055 Fix libmruby name for VisualC++
• #6060 SEGFAULT Issue Related to Fiber Usage in ngx_mruby Development
• #6061 Performance issue in String#codepoints
• #6064 MRUBY_PACKAGE_DIR does not always have a value.
• #6065 Null pointer dereference while handling the Proc class
• #6066 Null pointer dereference involving Struct.new()
• #6067 Null pointer dereference in mrb_string_value_cstr
• #6068 Stack overflow in mrb_vm_exec
• #6076 Fixed unwinding block that could point to invalid PC
• #6084 Incorrect symbolic sinks in binary built on Linux
• #6087 'Remote branch HEAD not found in upstream origin' error on build
• #6089 binding.eval() handles def expressions differently from CRuby
• #6098 Fails to call superclass of wrapped method
• #6099 ensure section is not executed if the function exits via a return in a proc
• #6108 VM crashes with break
• #6118 Fixed IO#read with buf
• #6120 Set EBADF if check_file_descriptor() fails
• #6126 Fixed return value of OP_RETURN_BLK called directly under C function
• #6134 String#unpack1 returns an array instead of a single string
• #6136 Fixed when combined mrb_fiber_resume() and Fiber#transfer

Pull Requests (User Visible Ones)

• #5517 Fixed local variables not separated between copied binding objects
• #5902 Replace MRB_NO_DIRECT_THREADING with MRB_USE_VM_SWITCH_DISPATCH
• #5923 Demotion mrb_f_raise() from MRB_API
• #5928 Improved rake install
• #5945 Avoid exposure for REnv objects
• #5946 Don't switch constant search path from modules to Object
• #5966 Update default.gembox add mruby debugger mrdb
• #5979 Allow Class#allocate to be prohibited
• #5981 Kernel#binding responds only to calls from Ruby
• #5989 Integrate mruby-binding-eval into mruby-eval
• #5961 Add Docker to build and run all mruby tests. Run pre-commit and generate YARD docs with Docker
• #5994 fix typo in mrbgems/mruby-io/src/io.c
• #6008 Make "bintest" independent of directory
• #6009 Avoid adding <MRUBY_ROOT>/bintest which does not exist
• #6011 Encode and decode escape characters for presym
• #6012 Allow tests to be disabled for specific gems; warn about disabled tests
• #6013 Fix Android toolchain
• #6022 Build configuration for MS-DOS and DJGPP
• #6032 Rake: update task clean to remove bin and build folders
• #6045 Fixes escape sequence bug and enhancements in Presym scanning
• #6054 Extends bin/mruby-config
• #6055 Fix libmruby name for VisualC++
• #6070 Demotion mrb_f_raise() in kernel.c from MRB_API too
• #6076 Fixed unwinding block that could point to invalid PC
• #6081 Add "x" mode option for IO.open
• #6086 Add build config for Nintendo Wii
• #6097 Add a new mrb_fiber_new() with MRB_API
• #6103 RBreak remembers the CI location
• #6105 Implement Fiber#to_s method
• #6106 Ease fiber limitations
• #6118 Fixed IO#read with buf
• #6120 Set EBADF if check_file_descriptor() fails
• #6122 Prohibit Class#allocate in a different way
• #6123 Inherit MRB_FL_UNDEF_ALLOCATE in subclasses
• #6125 Allow OP_RETURN_BLK to cross C boundaries
• #6126 Fixed return value of OP_RETURN_BLK called directly under C function
• #6130 dreamcast_shelf build config: complete overhaul
• #6136 Fixed when combined mrb_fiber_resume() and Fiber#transfer