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error[E0596]: cannot borrow value as mutable, as it is not declared as mutable
--> $DIR/borrowck-error-in-macro.rs:7:1
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LL | a::ice! {}
| ^^^^^^^^^^
| |
| cannot borrow as mutable
| a call in this macro requires a mutable binding due to mutable borrow of `d`
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= note: this error originates in the macro `a::ice` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider changing this to be mutable
--> $DIR/auxiliary/borrowck-error-in-macro.rs:6:17
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LL | let mut c = || *d += 1;
| +++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0596`.
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