Fix () -> (void) being rejected as SyntaxError#2884
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ksss merged 1 commit intoruby:masterfrom Mar 18, 2026
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`void_allowed` was hardcoded to `false` when parsing a parenthesized type, causing `(void)` to be rejected even in return type positions where `void` is valid.
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void_allowedwas hardcoded tofalsewhen parsing a parenthesized type, causing(void)to be rejected even in return type positions wherevoidis valid.