Fix Reference#exec_recursive, #exec_recursive_clone to be fiber aware
#15361
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Recursion of the `#inspect` and `#pretty_print` methods is handled by a global hash, which is a per-thread global, but if any of these methods yield —which will happen because they're writing to an IO— another fiber running on the same thread will falsely detect a recursion if it inspects the same object. This patch moves `Reference#exec_recursive` methods as instances of `Fiber`, using a per-fiber hash instead of per-thread/process hash. References crystal-lang#15088
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straight-shoota
approved these changes
Jan 21, 2025
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Thinking again about this: there's no need to move the implementation to Fiber, we only need to move the hash there. |
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This PR is OK with me, but is there anything covering the fiber-local variable usecase which is doable outside the stdlib? |
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@RX14 Nothing generic. We should open a new issue about that, it would be interesting to have something like a macro or annotation to keep fiber local data, without reopening |
Reference#exec_recursive[_clone] aren't fiber awareReference#exec_recursive, #exec_recursive_clone to be fiber aware
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Recursion of the
#inspectand#pretty_printmethods is handled by a global hash, which is a per-thread global, but if any of these methods yield —which will happen because they're writing to an IO— another fiber running on the same thread will falsely detect a recursion if it inspects the same object.This patch moves
Reference#exec_recursivemethods as instances ofFiber, using a per-fiber hash instead of per-thread/process hash.The example from #15088 now correctly prints: