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src
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test
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ui
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borrowck
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mut-borrow-of-mut-ref.rs
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// Suggest not mutably borrowing a mutable reference
fn
main
()
{
f
(&
mut
0
)
}
fn
f
(
b
:
&
mut
i32
)
{
g
(&
mut
b
)
//~ ERROR cannot borrow
}
fn
g
(
_
:
&
mut
i32
)
{}