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Programs that must fail #6
Rakudo 2026.08 rejects this broken program; Raku++ 5.0.0-g312cde8e runs it anyway
The program is broken on purpose, so the right behaviour is a compile-time error. Rakudo 2026.08 reports one; Raku++ 5.0.0-g312cde8e accepts the program without an error. Here the reference compiler is right. This difference is preserved as a Rakumap finding ↗
The program
class C { method 42() { } }
Run executes the program in your browser, with the Raku++ build this site ships. Edit it and try variations.
What each compiler printed
Rakudo 2026.08
(printed nothing)
Raku++ 5.0.0-g312cde8e
(printed nothing)
Error messages
Rakudo 2026.08
===SORRY!=== Error while compiling invalid-00000045.raku
Missing block
at invalid-00000045.raku:1
------> class C { method<HERE> 42() { } }Raku++ 5.0.0-g312cde8e
(no error — the program ran to the end)
invalid-v1 · seed 45 · recorded 2026-09-29 with Rakudo 2026.08 and Raku++ 5.0.0-g312cde8e · Source on GitHub ↗