mruby-mruby/doc/mruby3.2.md

User visible changes in mruby3.2 from mruby3.1

The language

• Now a::B = c should evaluate a then c.
• Anonymous arguments *, **, & can be passed for forwarding.
• Multi-precision integer is available now via mruby-bigint gem.

mruby VM and bytecode

• OP_ARYDUP was renamed to OP_ARYSPLAT. The instruction name was changed but instruction number and basic behavior have not changed (except that ARYDUP nil makes []).

Tools

mruby

• -b only specifies the script is the binary. The files loaded by -r are not affected by the option.
• mruby now loads complied binary if the suffix is .mrb.

mrbc

• Add --no-optimize option to disable optimization.

mrbgems

mruby-errno

• mruby-errno gem is now bundled.

mruby-class-ext

• Add Class#subclasses method.
• Add Module#undefined_instance_methods method.

mruby-set

New bundled gem.

CVEs

Following CVEs are fixed.

• CVE-2022-0481
• CVE-2022-0525
• CVE-2022-0570
• CVE-2022-0614
• CVE-2022-0623
• CVE-2022-0630
• CVE-2022-0717
• CVE-2022-1212
• CVE-2022-1276
• CVE-2022-1286