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9ae1a664f7b947dadb9e97eea7703831d9cd5d31
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src
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test
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ui
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borrowck
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borrowck-ref-mut-of-imm.rs
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fn
destructure
(
x
:
Option
<
isize
>)
->
isize
{
match
x
{
None
=>
0
,
Some
(
ref
mut
v
)
=>
*
v
//~ ERROR cannot borrow
}
}
fn
main
()
{
assert_eq
!(
destructure
(
Some
(
22
)),
22
);
}