YJIT: Fix autosplat miscomp for blocks with optionals #8006
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When passing an array as the sole argument to `yield`, and the yieldee takes more than 1 optional parameter, the array is expanded similar to `*array` splat calls. This is called "autosplat" in `setup_parameters_complex()`. Previously, YJIT did not detect this autosplat condition. It passed the array without expanding it, deviating from interpreter behavior. Detect this conditon and refuse to compile it. Fixes: Shopify/yjit#313
This is mirrors the same issue as YJIT. See previous commit.
k0kubun
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Jun 30, 2023
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Thank you Alan! ❤️ |
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YJIT: Fix autosplat miscomp for blocks with optionals When passing an array as the sole argument to `yield`, and the yieldee takes more than 1 optional parameter, the array is expanded similar to `*array` splat calls. This is called "autosplat" in `setup_parameters_complex()`. Previously, YJIT did not detect this autosplat condition. It passed the array without expanding it, deviating from interpreter behavior. Detect this conditon and refuse to compile it.
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When passing an array as the sole argument to
yield, and the yieldeetakes more than 1 optional parameter, the array is expanded similar
to
*arraysplat calls. This is called "autosplat" insetup_parameters_complex().Previously, YJIT did not detect this autosplat condition. It passed the
array without expanding it, deviating from interpreter behavior.
Detect this conditon and refuse to compile it.
Fixes: Shopify/yjit#313
The
setup_parameters_complex()logic, for reference:ruby/vm_args.c
Lines 643 to 649 in d49a92d