Use inner iterator may_have_side_effect for Cloned#56538
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bors merged 2 commits intorust-lang:masterfrom Dec 6, 2018
Merged
Use inner iterator may_have_side_effect for Cloned#56538bors merged 2 commits intorust-lang:masterfrom
bors merged 2 commits intorust-lang:masterfrom
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(rust_highfive has picked a reviewer for you, use r? to override) |
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Oops, modified this in wrong place, let me fix that. |
Previous implementation wasn't correct, as an inner iterator could have had side effects.
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Playground snippet to show the bug, that it silences sideeffects in map. I think we want to fix this because we don't want our use of specialization to be user-visible or affect sideeffectfulness of iterations. |
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I will try adding a test case for this bug when I get home. |
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@bors r+ rollup thanks! |
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📌 Commit a964307 has been approved by |
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Use inner iterator may_have_side_effect for Cloned Previous implementation wasn't correct, as an inner iterator could have had side effects. Noticed by @bluss in rust-lang#56534.
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Use inner iterator may_have_side_effect for Cloned Previous implementation wasn't correct, as an inner iterator could have had side effects. Noticed by @bluss in rust-lang#56534.
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Rollup of 15 pull requests Successful merges: - #51753 (Document `From` implementations) - #55563 (Improve no result found sentence in doc search) - #55987 (Add Weak.ptr_eq) - #56119 (Utilize `?` instead of `return None`.) - #56372 (Refer to the second borrow as the "second borrow" in E0501.rs) - #56388 (More MIR borrow check cleanup) - #56424 (Mention raw-ident syntax) - #56452 (Remove redundant clones) - #56456 (Handle existential types in dead code analysis) - #56466 (data_structures: remove tuple_slice) - #56476 (Fix invalid line number match) - #56497 (cleanup: remove static lifetimes from consts in libstd) - #56498 (Fix line numbers display) - #56523 (Added a bare-bones eslint config (removing jslint)) - #56538 (Use inner iterator may_have_side_effect for Cloned) Failed merges: r? @ghost
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Previous implementation wasn't correct, as an inner iterator could have had side effects. Noticed by @bluss in #56534.