One more possibly bad import check

[steveklabnik]

compile_and_link: x86_64-apple-darwin/stage2/lib/rustc/x86_64-apple-darwin/lib/librustc.dylib
/Users/steve/src/rust/src/librustc/driver/driver.rs:33:0: 33:17 warning: unused import [-W unused-imports (default)]
/Users/steve/src/rust/src/librustc/driver/driver.rs:33 use std::getopts;
                                                       ^~~~~~~~~~~~~~~~~

When removed:

Users/steve/src/rust/src/librustc/driver/driver.rs:528:39: 528:55 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:528                              matches: &getopts::Matches,
                                                                                               ^~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:528:39: 528:55 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:528                              matches: &getopts::Matches,
                                                                                               ^~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:528:39: 528:55 error: use of undeclared type name `getopts::Matches`
/Users/steve/src/rust/src/librustc/driver/driver.rs:528                              matches: &getopts::Matches,
                                                                                               ^~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:552:32: 552:49 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:552         let flags = vec::append(getopts::opt_strs(matches, level_short),
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:552:32: 552:49 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:552         let flags = vec::append(getopts::opt_strs(matches, level_short),
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:552:32: 552:49 error: unresolved name: `getopts::opt_strs`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:552         let flags = vec::append(getopts::opt_strs(matches, level_short),
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:553:32: 553:49 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:553                                 getopts::opt_strs(matches, level_name));
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:553:32: 553:49 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:553                                 getopts::opt_strs(matches, level_name));
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:553:32: 553:49 error: unresolved name: `getopts::opt_strs`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:553                                 getopts::opt_strs(matches, level_name));
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:569:22: 569:39 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:569     let debug_flags = getopts::opt_strs(matches, ~"Z");
                                                                              ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:569:22: 569:39 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:569     let debug_flags = getopts::opt_strs(matches, ~"Z");
                                                                              ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:569:22: 569:39 error: unresolved name: `getopts::opt_strs`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:569     let debug_flags = getopts::opt_strs(matches, ~"Z");
                                                                              ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:601:22: 601:44 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:601     let sysroot_opt = getopts::opt_maybe_str(matches, ~"sysroot");
                                                                              ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:601:22: 601:44 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:601     let sysroot_opt = getopts::opt_maybe_str(matches, ~"sysroot");
                                                                              ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:601:22: 601:44 error: unresolved name: `getopts::opt_maybe_str`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:601     let sysroot_opt = getopts::opt_maybe_str(matches, ~"sysroot");
                                                                              ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:603:21: 603:43 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:603     let target_opt = getopts::opt_maybe_str(matches, ~"target");
                                                                             ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:603:21: 603:43 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:603     let target_opt = getopts::opt_maybe_str(matches, ~"target");
                                                                             ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:603:21: 603:43 error: unresolved name: `getopts::opt_maybe_str`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:603     let target_opt = getopts::opt_maybe_str(matches, ~"target");
                                                                             ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:604:29: 604:51 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:604     let target_feature_opt = getopts::opt_maybe_str(matches, ~"target-feature");
                                                                                     ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:604:29: 604:51 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:604     let target_feature_opt = getopts::opt_maybe_str(matches, ~"target-feature");
                                                                                     ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:604:29: 604:51 error: unresolved name: `getopts::opt_maybe_str`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:604     let target_feature_opt = getopts::opt_maybe_str(matches, ~"target-feature");
                                                                                     ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:605:21: 605:41 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:605     let save_temps = getopts::opt_present(matches, ~"save-temps");
                                                                             ^~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:605:21: 605:41 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:605     let save_temps = getopts::opt_present(matches, ~"save-temps");
                                                                             ^~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:605:21: 605:41 error: unresolved name: `getopts::opt_present`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:605     let save_temps = getopts::opt_present(matches, ~"save-temps");
                                                                             ^~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:615:18: 615:34 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:615             match getopts::opt_str(matches, ~"opt-level") {
                                                                          ^~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:615:18: 615:34 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:615             match getopts::opt_str(matches, ~"opt-level") {
                                                                          ^~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:615:18: 615:34 error: unresolved name: `getopts::opt_str`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:615             match getopts::opt_str(matches, ~"opt-level") {
                                                                          ^~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:643:32: 643:49 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:643     let addl_lib_search_paths = getopts::opt_strs(matches, ~"L").map(|s| Path(*s));
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:643:32: 643:49 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:643     let addl_lib_search_paths = getopts::opt_strs(matches, ~"L").map(|s| Path(*s));
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:643:32: 643:49 error: unresolved name: `getopts::opt_strs`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:643     let addl_lib_search_paths = getopts::opt_strs(matches, ~"L").map(|s| Path(*s));
                                                                                        ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:644:17: 644:39 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:644     let linker = getopts::opt_maybe_str(matches, ~"linker");
                                                                         ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:644:17: 644:39 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:644     let linker = getopts::opt_maybe_str(matches, ~"linker");
                                                                         ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:644:17: 644:39 error: unresolved name: `getopts::opt_maybe_str`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:644     let linker = getopts::opt_maybe_str(matches, ~"linker");
                                                                         ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:645:22: 645:39 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:645     let linker_args = getopts::opt_strs(matches, ~"link-args").flat_map( |a| {
                                                                              ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:645:22: 645:39 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:645     let linker_args = getopts::opt_strs(matches, ~"link-args").flat_map( |a| {
                                                                              ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:645:22: 645:39 error: unresolved name: `getopts::opt_strs`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:645     let linker_args = getopts::opt_strs(matches, ~"link-args").flat_map( |a| {
                                                                              ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:653:29: 653:46 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:653     let cfg = parse_cfgspecs(getopts::opt_strs(matches, ~"cfg"), demitter);
                                                                                     ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:653:29: 653:46 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:653     let cfg = parse_cfgspecs(getopts::opt_strs(matches, ~"cfg"), demitter);
                                                                                     ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:653:29: 653:46 error: unresolved name: `getopts::opt_strs`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:653     let cfg = parse_cfgspecs(getopts::opt_strs(matches, ~"cfg"), demitter);
                                                                                     ^~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:655:29: 655:51 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:655     let android_cross_path = getopts::opt_maybe_str(
                                                                                     ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:655:29: 655:51 error: use of undeclared module `getopts`
/Users/steve/src/rust/src/librustc/driver/driver.rs:655     let android_cross_path = getopts::opt_maybe_str(
                                                                                     ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:655:29: 655:51 error: unresolved name: `getopts::opt_maybe_str`.
/Users/steve/src/rust/src/librustc/driver/driver.rs:655     let android_cross_path = getopts::opt_maybe_str(
                                                                                     ^~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:742:24: 742:49 error: unresolved name
/Users/steve/src/rust/src/librustc/driver/driver.rs:742 pub fn optgroups() -> ~[getopts::groups::OptGroup] {
                                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:742:24: 742:49 error: use of undeclared module `getopts::groups`
/Users/steve/src/rust/src/librustc/driver/driver.rs:742 pub fn optgroups() -> ~[getopts::groups::OptGroup] {
                                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~
/Users/steve/src/rust/src/librustc/driver/driver.rs:742:24: 742:49 error: use of undeclared type name `getopts::groups::OptGroup`
/Users/steve/src/rust/src/librustc/driver/driver.rs:742 pub fn optgroups() -> ~[getopts::groups::OptGroup] {
                                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 45 previous errors

After a snapshot is made, and this and #6630 are resolved, the build has no more warnings. 🤘

[alexcrichton]

This is definitely a bug. Much smaller test than all of rustc (although still not tiny)

use foo::name::name; // should be unused
use foo::name;       // warning emits here instead

pub mod foo {
    pub mod name {
        pub type a = int;
        pub mod name {
            pub type a = float;
        }
    }
}

fn bar() -> name::a { 1 }

fn main(){}