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closures
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closure-immutable-outer-variable.fixed
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// run-rustfix
// Point at the captured immutable outer variable
fn foo
(
mut f
:
Box
<
dyn
FnMut
()>)
{
f
();
}
fn main
()
{
let
mut y
=
true
;
foo
(
Box
::
new
(
move
||
y
=
false
)
as
Box
<
_
>);
//~^ ERROR cannot assign to `y`, as it is not declared as mutable
}