NEWS

User visible changes in mruby3.4 from mruby3.3

“NOTE:” are changes to be aware of.

The language

  • mruby now supports private and protected visibitily (b0db0bd)

  • Maximum length of inlined symbols reduced from 5 to 4 characters to provide space for visibility flags (6442a01)

  • Many methods are made private according to CRuby visibility (4a0e806)

  • Generate OP_SSEND for self.method type calls (111fe4b)

  • initialize method will be always private (eb8b412)

  • Add new hooks method_removed, method_undefined (9c74f6e)

  • Add new hooks singleton_method_removed, singleton_method_undefined (0863c08)

  • Updated OP_DEF output from codedump (3a3e877)

  • Better handling of binary strings, e.g. String#b (b0127f0)

  • Hash to_s format has changed (baeeb5e)

  • Some encoding related method such as #force_encoding (e47b4ca), #b (b0127f0)

  • Constant folding for String#+ (6687bdd)

  • Remove Float bit-operation (db8368f)

  • use SWAR technique for strlen performance (cbb31e6)

  • use merge sort for Array#sort (5bd63d6)

Changes in C API

  • pool.c renamed to mempool.c (and mrb_pool to mrb_mempool) (49525fa)

  • mrb_pool_value renamed to mrb_irep_pool to reduce confusion (62ef5db)

  • rename BOXNIX_SET_VALUE to BOXNO_SET_VALUE (#6397)

  • MRB_FROZEN_P() is replaced by mrb_frozen_p() (c11d18e)

  • rename color to gc_color (0e79f6b, 1e36d76)

  • add obj->frozen instead of flags MRB_SET_FROZEN_FLAG/MRB_UNSET_FROZEN_FLAG (8276143)

Build & Configuration

  • New Build Target: test:run:serial, test:run:serial:lib, test:run:serial:bin (#6423)

  • New Platform: Playstation Portable (#6022)

  • New Platform: emscripten (#6487)

  • New Config: no-float (with MRB_NO_FLOAT) (32200f1)

Changes in mrbgems

  • mruby-print: removed; if you do not use mruby-io, mruby use #print etc. in the core (8c8bbd9)

  • mruby-enum-lazy: Add Enumerable::Lazy#grep_v to mruby-enum-lazy (#6171)

  • mruby-io: Add level argument to File.dirname (#6463)

  • mruby-io: File.absolute_path? (#6482)

  • mruby-io: File.absolute_path (96113a2)

  • mruby-toplevel-ext: top-level public/private/protected moved to the core (2a876d2)

  • mruby-metaprog: method list methods now works according to the visibility (9229da1)

  • mruby-metaprog: public_instance_methods, private_instance_methods, protected_instance_methods (9e3e7b2)

  • mruby-encoding: MRB_UTF8_STRING turned on automatically with this gem (74bdae9)

Fixed GitHub Issues

  • #6173 Fails to build with tcc(Tiny C Compiler)

  • #6156 ‘/LIBPATH’ issue

  • #6183 “.e”.to_f returns NAN

  • #6182 mrb_read_float() converts “0.3” with a small error compared to strtod()

  • #6210 Unary minus seems broken

  • #6255 Wrong number of characters in broken UTF-8 string

  • #4038 Heap buffer overflow in OP_ENTER

  • #6262 Unable to define == for objects when using Array#delete

  • #6267 When MRB_UTF8_STRING is enabled, giving byte characters for String#index and String#split gives wrong results

  • #6277 MSVC: can’t use malloc() in string.c with WIN32_LEAN_AND_MEAN

  • #6240 Differentiate between lib and lib64 in the build settings.

  • #6304 Calling method_missing with only Kwargs passes arguments incorrectly

  • #6317 mrb_gc_register() may cause GC and collect the object being protected

  • #6307 Planned change patch for mrb_vm_exec()

  • #6298 foo :bar {} is legal in mruby?

  • #6326 Detect “Use-after-free” with address sanitizer

  • #5358 static warning from getpwnam

  • #6339 mrb_ary_delete() may refer to an invalid address (use-after-free)

  • #6346 Block kwargs are passed as last positional arg when using yield

  • #6365 powl() not available when compiling for Dreamcast

  • #6369 100x Performance Regression from 3.1

  • #6270 NODE_ZSUPER from deeply nested blocks will result in a truncated digits for block index in OP_ARGARY

  • #6297 Assigning to a block variable changes the actual block (thus affecting block_given? and yield)

  • #6389 instance_exec named block args don’t work properly

  • #6388 Recent commit broke my windows build

  • #6411 Wrong function unwinding when using return in a block

  • #6439 OP_JMPUW does not call the ensure block when it jumps to the beginning of the begin block

  • #6441 break inside while loop will execute the ensure block outside of the while loop

  • #6453 Bigint: incorrect behavior of ^ operator

  • #6452 Bigint: weird mod behavior

  • #6451 Bigint: incorrect division behavior

  • #6456 bigint: bug with division of a small number by a bigint

  • #6466 mruby-bin-mruby using Kernel#p and Kernel#print in bintest fails test

  • #6467 Heap-Use-After-Free due to Recursive group_by Calls

  • #6471 Discrepancy in codegen for binary operations between master branch and 3.3.0

  • #6477 heap-buffer-overflow in mrb_vm_exec

  • #6485 Hash#rehash does not check if the hash is frozen

  • #6483 Hash#default_proc= accepts arbitrary objects that are not callable

  • #6491 Destroy existing string literals when composing string literals

Merged Pull Requests (User Visible Ones)

  • #6171 Add Enumerable::Lazy#grep_v to mruby-enum-lazy

  • #6174 Fix MRUBY_PACKAGE_DIR in mruby-config.bat

  • #6175 Corrected strange conditional in mrb_vm_run()

  • #6176 Stop assuming alias proc in CI_PROC_SET()

  • #6177 gha: add macOS 14 to the build

  • #6184 Remove the L_STOP label

  • #6185 Added mrb_callinfo::u.keep_context for clarity

  • #6186 Omit NULL check of e->cxt in OP_RETURN_BLK

  • #6191 Speed up symbol equality comparison

  • #6192 Fix OP_STOP with exception

  • #6193 Fix wrong assertion in OP_SENDB.

  • #6194 Simplify the calculation of the number of closures in MRB_TT_FIBER

  • #6197 Fix int_xor to call flo_xor.

  • #6201 tasks/doc.rake: standardize the rake doc error messages

  • #6202 Remove the .yardoc folder with rake doc:clean:api

  • #6204 Clean up the .editorconfig file

  • #6209 Minor .gitignore clean up

  • #6211 Minor .gitignore clean up; order entries

  • #6216 Shared empty iv_tbl of module

  • #6217 Strict declaration for mrb_istruct_size()

  • #6219 Avoid assigning a fixed value in the loop

  • #6220 Reorganize mrb_cache_entry and mrb_method_t types

  • #6221 Arranging each_backtrace()

  • #6222 Need to synchronize dbg->regs after VM call in mrdb

  • #6224 mrb_env_unshare() to break the link to fiber

  • #6225 Revert “Adjust environment when mrb_exec_irep happened.”

  • #6227 fix: Array#shuffle(!) result distribution

  • #6228 Revert “env referred from top-level callinfo should not be unshared; fix #4019”

  • #6230 Fix status of fiber after switched by exception raised

  • #6231 Add a way to let other gems handle closing of fds in mruby-io

  • #6232 Fold the code for freeing env

  • #6233 Free stack memory at end of fiber

  • #6235 fix Array#delete always firing the block when deleting nil

  • #6236 unify the code for filter methods (and speed up #reject!)

  • #6237 Stricter env objects to attach to ci

  • #6238 Minimize zero initialization of the stack

  • #6243 Fixed base64 decoding in mruby-pack

  • #6244 Revise scope of role of mrb_vm_run()

  • #6246 Fix typo in test/t/hash.rb

  • #6249 Fix grammar in src/vm.c; catched -> caught

  • #6250 Fix spelling

  • #6251 Clean up root move CODEOWNERS to .github directory

  • #6253 Allow recycling fibers by GC if not referenced directly

  • #6256 Update documentation for mrb_top_run()

  • #6257 fix some mrbconf.md typos

  • #6260 Remove exc_caught from mrb_vm_exec()

  • #6261 fix: to_a integer ranges with begin > end failing

  • #6263 fix: Array#delete mistakenly calling block even if not passed

  • #6264 Must pass keyword arguments for Kernel#to_enum

  • #6265 Fixes Dir.children and Dir.each_child

  • #6266 Passes the nonexistent key as a block argument in Array#delete

  • #6273 Improvements to mrb_protect_atexit()

  • #6275 Fixed Binding#eval that failed to assign to the same variable

  • #6276 Always run atexit on the top-level call frame

  • #6279 Include headers for malloc() explicitly; fix #6277

  • #6280 Remove MRB_ENV_CLOSED flag

  • #6281 Fixes local variables in mruby-binding.

  • #6283 Simplify uvenv()

  • #6288 Detach env of ci explicitly on atexit

  • #6289 Simplify OP_RETURN_BLK and OP_BREAK

  • #6290 Allow to change the output directory name of the libmruby file

  • #6293 Changed the instruction table in opcode.md

  • #6294 Optimise mrb_iv_get

  • #6302 Minor cleanup in mrb_str_init

  • #6303 mrb_str_aset_m() should return replace instead of str

  • #6305 Protect keyword arguments in prepare_missing()

  • #6308 Assume that MRB_CATCH() has mrb->exc set

  • #6310 Doubling the call stack when extending it

  • #6311 Added fast-path for positional arguments less than 15 in OP_SEND

  • #6312 Omit error checking at OP_RETURN, OP_RETURN_BLK and OP_BREAK

  • #6313 Fix wrong column number in opcode.md

  • #6314 Optimize even?/odd? for big integers

  • #6318 Shrink variables in mrb_vm_exec()

  • #6320 Shrinking the code in OP_BREAK and OP_RETURN_BLK

  • #6321 Avoid warnings in lib/*/.rb

  • #6322 Fix mrb_ro_data_p on Intel Mac

  • #6324 Remove localjump_error()

  • #6327 fix ncurses linking issues

  • #6328 Fix use-after-free in obj_free() for env objects

  • #6329 Fix use-after-free in mrb_obj_alloc()

  • #6330 Add a precondition to call mrb_env_unshare().

  • #6331 Restore the GC arena with tests

  • #6332 Must not depend on the “host” build to generate mruby-compiler/core/y.tab.c

  • #6333 Reduce the number of branch instructions in the heap_p()

  • #6335 Add return_ci in CHECKPOINT_MAIN() of OP_RETURN

  • #6338 Need to place static proc objects into 8-byte alignments

  • #6340 Fix use-after-free for Array#<=>

  • #6341 Need to restore the GC arena after some function calls

  • #6344 prefer using mrb_yield to call block arguments

  • #6347 codegen.c,parse.y: remove flattening of yield arguments; fix #6346

  • #6348 Cancel the warning disablement

  • #6349 Perform GC before deleting directories

  • #6350 Fixed character encoding conversion function mismatch

  • #6351 Remove unnecessary mrb_gc_arena_restore()

  • #6353 Fix use-after-free in mrb_ary_delete()

  • #6356 Making splat argument objects invisible from Ruby side

  • #6373 Add build config for Milk-V Duo (RISC-V Linux) board

  • #6382 Make array objects invisible in mrb_gc_register()

  • #6385 Small improvements for mrb_gc_register()

  • #6386 Avoid calling mrb_gv_set() from mrb_gc_unregister()

  • #6387 Small improvements for mrb_gc_unregister()

  • #6390 Fix use-after-free by mrb_gc_unregistor()

  • #6391 Fixed argument forwarding in instance_exec

  • #6392 Fix argument forwarding in mrb_exec_irep()

  • #6393 Follow-up to #6391

  • #6395 Storing method-id inside Symbol#to_proc

  • #6396 Milk-V Build Config: update GPIO gem URL

  • #6397 boxing_no.h: rename BOXNIX_SET_VALUE -> BOXNO_SET_VALUE

  • #6399 Add macOS 15 to the build

  • #6405 io_read: use %i instead of %d in call to mrb_raisef

  • #6407 Allow to exclude specific files in rake install

  • #6408 Improve compliance with C++ standards

  • #6410 Put #include <stdlib.h> in parse.y

  • #6412 Distinguish the call frame of the generator with OP_RETURN_BLK

  • #6413 Add links to documentation in README.md

  • #6415 Fix numbered parameters when used as a singleton

  • #6416 Optimize the “new” method’s iseq

  • #6419 Follow Ruby’s behavior for numbered parameters in -> {}

  • #6420 Update labeler.yml: add label for the tools directory

  • #6422 Add annotations for function names defined in the preprocessor

  • #6423 Adding a serialized test task

  • #6427 Need to update ci variable after re-entry to VM

  • #6428 Change the limits of OP_ADDI and OP_SUBI from 0-127 to 0-255.

  • #6429 Fix numbered parameters when used as hash keys

  • #6432 Moving code in macro arguments out of macros

  • #6434 Added document “Layout of the mruby filesystem”

  • #6436 Make rake doc:update-index prettier friendly

  • #6437 Add more details to the pre-commit config

  • #6438 Remove unused MRuby::Build#list_install_excludes method

  • #6440 Fix redo keyword

  • #6442 Fixed wrong range condition in OP_JMPUW

  • #6443 Fix NODE_NEGATE for bigints

  • #6444 Add test cases for bigints

  • #6446 Omit the _WIN64 definition check

  • #6447 Fixed File.expand_path

  • #6448 Suppress presym in mruby/ext/io.h file

  • #6449 Using presym in the mruby-io/src/file_test.c file

  • #6450 Change MRB_WITH_IO_PREAD_PWRITE configuration name

  • #6454 mruby-bigint: handle rhs bigint in int_mod and int_divmod functions

  • #6455 mruby-bigint: fix rounding behavior in mpz_mdiv and mpz_mdivmod functions

  • #6457 bigint: fix bug with division of a small number by a bigint

  • #6459 FileTest is a module

  • #6461 To create a release package file in draft

  • #6462 Properly cast the return value of memchr()

  • #6463 Add level argument to File.dirname

  • #6465 Add initial playstation portable crossbuild support

  • #6468 Fixed missing changes to IB_FIND_BY_KEY() parameter names

  • #6469 Add more const qualifier for RProc

  • #6472 Moved tests for Integer#quo

  • #6473 Hide mpz_and() symbol

  • #6473 Hide mpz_and() symbol

  • #6474 Avoid array object creation with “unknown keyword” error

  • #6475 Don’t include deleted mruby-print

  • #6478 Fixed buffer overrun in function chars2bytes()

  • #6479 Reimplementation of File.expand_path method

  • #6482 Add File.absolute_path? method

  • #6487 Add Emscripten toolchain & build_config