error[E0433]: failed to resolve: use of undeclared crate or module `fmt`
  --> $DIR/issue-112590-suggest-import.rs:3:6
   |
LL | impl fmt::Debug for S {
   |      ^^^ use of undeclared crate or module `fmt`
   |
help: consider importing this module
   |
LL + use std::fmt;
   |

error[E0433]: failed to resolve: use of undeclared crate or module `fmt`
  --> $DIR/issue-112590-suggest-import.rs:4:28
   |
LL |     fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
   |                            ^^^ use of undeclared crate or module `fmt`
   |
help: consider importing this module
   |
LL + use std::fmt;
   |

error[E0433]: failed to resolve: use of undeclared crate or module `fmt`
  --> $DIR/issue-112590-suggest-import.rs:4:51
   |
LL |     fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
   |                                                   ^^^ use of undeclared crate or module `fmt`
   |
help: consider importing this module
   |
LL + use std::fmt;
   |

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0433`.