Fix destructuring of block argument with default value#9376
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headius merged 1 commit intoMay 5, 2026
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It fixes incorrect behaviour found in instance_exec, module_exec and
class_exec:
Object.new.instance_exec([1, 2]) { |x = :unset| x }
=> 1
headius
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Seems simple enough for now, just narrowing the cases where we expand that argument. Needs a long-term cleanup at some point.
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It fixes #9375 - incorrect behaviour found in
instance_exec,module_execandclass_exec:The fix is similar to #9211
The alternative I considered is to maybe put that logic (
sig.opt() + sig.required() == 1 && !sig.hasRest()) but I'm not sure it would be correct. Sounds like it, but it's not how the fix was applied in the other PR. Will be happy to change.