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NLL: Invalid "cannot borrow as mutable more than once" error related to array of mutable references #52111

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lqd opened this issue Jul 6, 2018 · 2 comments
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NLL: Invalid "cannot borrow as mutable more than once" error related to array of mutable references #52111

lqd opened this issue Jul 6, 2018 · 2 comments
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A-NLL Area: Non-lexical lifetimes (NLL) NLL-complete Working towards the "valid code works" goal
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Rust 2018 Preview 2

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@lqd
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lqd commented Jul 6, 2018

Found while triaging the nll-1 crater run, extracted from fscm-0.1.1.

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Accessing the first element in the array generates an error about the second element borrowing _ more than once at a time. Mutating the second element compiles fine though.
@lqd lqd added A-NLL Area: Non-lexical lifetimes (NLL) NLL-complete Working towards the "valid code works" goal labels Jul 6, 2018
@nikomatsakis nikomatsakis added this to the Rust 2018 Preview 2 milestone Jul 6, 2018
@matthewjasper
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This looks like it was fixed by #51894

@lqd
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lqd commented Jul 9, 2018

Confirmed on the latest nightly

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