[INFO] crate wires 0.7.1 is already in cache
[INFO] extracting crate wires 0.7.1 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/wires/0.7.1
[INFO] extracting crate wires 0.7.1 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/wires/0.7.1
[INFO] validating manifest of wires-0.7.1 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of wires-0.7.1 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing wires-0.7.1
[INFO] finished frobbing wires-0.7.1
[INFO] frobbed toml for wires-0.7.1 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/wires/0.7.1/Cargo.toml
[INFO] started frobbing wires-0.7.1
[INFO] finished frobbing wires-0.7.1
[INFO] frobbed toml for wires-0.7.1 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/wires/0.7.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking wires-0.7.1 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/wires/0.7.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] eabaeba9c3c5301e63d4a1ff0babe8d69c514e7512e7156ca100ef097b05071f
[INFO] running `"docker" "start" "-a" "eabaeba9c3c5301e63d4a1ff0babe8d69c514e7512e7156ca100ef097b05071f"`
[INFO] [stderr]     Checking mozprofile v0.2.1
[INFO] [stderr]     Checking webdriver v0.8.1
[INFO] [stderr]     Checking mozrunner v0.2.0
[INFO] [stderr]     Checking wires v0.7.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/marionette.rs:696:54
[INFO] [stderr]     |
[INFO] [stderr] 696 |                                           Ok(Date::new((try_opt!(
[INFO] [stderr]     |  ______________________________________________________^
[INFO] [stderr] 697 | |                                             x.as_u64(),
[INFO] [stderr] 698 | |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 699 | |                                             "Failed to interpret domain as String"))))
[INFO] [stderr]     | |____________________________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 696 |                                         Ok(Date::new(try_opt!(
[INFO] [stderr] 697 |                                             x.as_u64(),
[INFO] [stderr] 698 |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 699 |                                             "Failed to interpret domain as String")))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/marionette.rs:704:54
[INFO] [stderr]     |
[INFO] [stderr] 704 |                                           Ok(Date::new((try_opt!(
[INFO] [stderr]     |  ______________________________________________________^
[INFO] [stderr] 705 | |                                             x.as_u64(),
[INFO] [stderr] 706 | |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 707 | |                                             "Failed to interpret domain as String"))))
[INFO] [stderr]     | |____________________________________________________________________________________^
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 704 |                                         Ok(Date::new(try_opt!(
[INFO] [stderr] 705 |                                             x.as_u64(),
[INFO] [stderr] 706 |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 707 |                                             "Failed to interpret domain as String")))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]     --> src/marionette.rs:1139:20
[INFO] [stderr]      |
[INFO] [stderr] 1139 |                 '0'...'9' => {
[INFO] [stderr]      |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/marionette.rs:696:54
[INFO] [stderr]     |
[INFO] [stderr] 696 |                                           Ok(Date::new((try_opt!(
[INFO] [stderr]     |  ______________________________________________________^
[INFO] [stderr] 697 | |                                             x.as_u64(),
[INFO] [stderr] 698 | |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 699 | |                                             "Failed to interpret domain as String"))))
[INFO] [stderr]     | |____________________________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 696 |                                         Ok(Date::new(try_opt!(
[INFO] [stderr] 697 |                                             x.as_u64(),
[INFO] [stderr] 698 |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 699 |                                             "Failed to interpret domain as String")))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/marionette.rs:704:54
[INFO] [stderr]     |
[INFO] [stderr] 704 |                                           Ok(Date::new((try_opt!(
[INFO] [stderr]     |  ______________________________________________________^
[INFO] [stderr] 705 | |                                             x.as_u64(),
[INFO] [stderr] 706 | |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 707 | |                                             "Failed to interpret domain as String"))))
[INFO] [stderr]     | |____________________________________________________________________________________^
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 704 |                                         Ok(Date::new(try_opt!(
[INFO] [stderr] 705 |                                             x.as_u64(),
[INFO] [stderr] 706 |                                             ErrorStatus::UnknownError,
[INFO] [stderr] 707 |                                             "Failed to interpret domain as String")))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]     --> src/marionette.rs:1139:20
[INFO] [stderr]      |
[INFO] [stderr] 1139 |                 '0'...'9' => {
[INFO] [stderr]      |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/marionette.rs:55:1
[INFO] [stderr]     |
[INFO] [stderr] 55  | / lazy_static! {
[INFO] [stderr] 56  | |     pub static ref E10S_PREFERENCES: [(&'static str, Pref); 1] = [
[INFO] [stderr] 57  | |         ("browser.tabs.remote.autostart", Pref::new(true)),
[INFO] [stderr] 58  | |     ];
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     ];
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/marionette.rs:1125:13
[INFO] [stderr]      |
[INFO] [stderr] 1125 |         let mut stream = self.stream.as_mut().unwrap();
[INFO] [stderr]      |             ----^^^^^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/marionette.rs:1127:17
[INFO] [stderr]      |
[INFO] [stderr] 1127 |             let mut buf = &mut [0 as u8];
[INFO] [stderr]      |                 ----^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/marionette.rs:1149:13
[INFO] [stderr]      |
[INFO] [stderr] 1149 |         let mut buf = &mut [0 as u8; 8192];
[INFO] [stderr]      |             ----^^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/marionette.rs:1125:13
[INFO] [stderr]      |
[INFO] [stderr] 1125 |         let mut stream = self.stream.as_mut().unwrap();
[INFO] [stderr]      |             ----^^^^^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/marionette.rs:1127:17
[INFO] [stderr]      |
[INFO] [stderr] 1127 |             let mut buf = &mut [0 as u8];
[INFO] [stderr]      |                 ----^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/marionette.rs:1149:13
[INFO] [stderr]      |
[INFO] [stderr] 1149 |         let mut buf = &mut [0 as u8; 8192];
[INFO] [stderr]      |             ----^^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.48s
[INFO] running `"docker" "inspect" "eabaeba9c3c5301e63d4a1ff0babe8d69c514e7512e7156ca100ef097b05071f"`
[INFO] running `"docker" "rm" "-f" "eabaeba9c3c5301e63d4a1ff0babe8d69c514e7512e7156ca100ef097b05071f"`
[INFO] [stdout] eabaeba9c3c5301e63d4a1ff0babe8d69c514e7512e7156ca100ef097b05071f