JuliaLang/julia

disallow return in finally

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#57,875 创建于 2025年3月24日

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 (20 评论) (9 反应) (0 负责人)Julia (48,709 star) (5,773 fork)batch import
breakinghelp wantedminor changeneeds pkgeval

描述

This is unfortunate:

julia> function f(x)
           try
               error("test")
           finally
               return x
           end
       end

julia> f(4)
4

Brought up by @dalum on Slack. Would be good to simple make return in a finally block a syntax error. Seems unlikely to be widely used.

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研究方向
Review the Julia compiler's parser code (likely in 'src/julia parser.scm' or similar) to understand how try finally blocks are handled. Identify the location where return statements in finally blocks are currently accepted and add a syntax error. Ensure that the change does not break other valid uses of return. Add corresponding test cases to the test suite. Consult the discussion in the issue for any concerns about backwards compatibility.
disallow return in finally · JuliaLang/julia#57875 | Good First Issue