Ruby

When I use postposition rescue and if at same line, the behavior is changed since Ruby 3.4.

Reproduction¶

def foo return "hogehoge" rescue nil if false return "fugafuga" end foo 

Result with Ruby 3.3¶

irb(main):001> RUBY_VERSION => "3.3.6" irb(main):002* def foo irb(main):003* return "hogehoge" rescue nil if false irb(main):004* return "fugafuga" irb(main):005> end => :foo irb(main):006> foo => "fugafuga" 

YARV bytecode

ruby 3.3.6 (2024-11-05 revision 75015d4c1f) [x86_64-linux] == disasm: #<ISeq:<compiled>@<compiled>:1 (1,0)-(6,3)> 0000 definemethod :foo, foo ( 1)[Li] 0003 putself ( 6)[Li] 0004 opt_send_without_block <calldata!mid:foo, argc:0, FCALL|VCALL|ARGS_SIMPLE> 0006 leave == disasm: #<ISeq:foo@<compiled>:1 (1,0)-(4,3)> 0000 putstring "fugafuga" ( 3)[LiCa] 0002 leave ( 4)[Re] 

Result with Ruby 3.4¶

irb(main):001> RUBY_VERSION => "3.4.1" irb(main):002* def foo irb(main):003* return "hogehoge" rescue nil if false irb(main):004* return "fugafuga" irb(main):005> end => :foo irb(main):006> foo => "hogehoge" 

YARV bytecode

ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-linux] == disasm: #<ISeq:<compiled>@<compiled>:1 (1,0)-(1,54)> 0000 putself ( 1)[Li] 0001 opt_getconstant_path <ic:0 RubyVM::InstructionSequence> 0003 opt_getconstant_path <ic:1 DATA> 0005 opt_send_without_block <calldata!mid:new, argc:1, ARGS_SIMPLE> 0007 opt_send_without_block <calldata!mid:disassemble, argc:0, ARGS_SIMPLE> 0009 opt_send_without_block <calldata!mid:puts, argc:1, FCALL|ARGS_SIMPLE>