1 error[E0659]: `std` is ambiguous (name vs any other name during import resolution)
2 --> $DIR/ambiguity-macros-nested.rs:8:13
7 = note: `std` could refer to a built-in crate
8 = help: use `::std` to refer to this crate unambiguously
9 note: `std` could also refer to the module defined here
10 --> $DIR/ambiguity-macros-nested.rs:13:13
18 | ---- in this macro invocation
19 = help: use `self::std` to refer to this module unambiguously
20 = note: this error originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
22 error: aborting due to previous error
24 For more information about this error, try `rustc --explain E0659`.