[INFO] fetching crate vec-option 0.3.0...
[INFO] testing vec-option-0.3.0 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate vec-option 0.3.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate vec-option 0.3.0 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vec-option 0.3.0
[INFO] finished tweaking crates.io crate vec-option 0.3.0
[INFO] tweaked toml for crates.io crate vec-option 0.3.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e9526159996c3aba3709bdc6ba1efc94b933469e65a14a6652fcee38876f5bf
[INFO] running `Command { std: "docker" "start" "-a" "0e9526159996c3aba3709bdc6ba1efc94b933469e65a14a6652fcee38876f5bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e9526159996c3aba3709bdc6ba1efc94b933469e65a14a6652fcee38876f5bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e9526159996c3aba3709bdc6ba1efc94b933469e65a14a6652fcee38876f5bf", kill_on_drop: false }`
[INFO] [stdout] 0e9526159996c3aba3709bdc6ba1efc94b933469e65a14a6652fcee38876f5bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35c64beac622cfdacd02c27421362d79d7614da6789b61bf8b4d1b6813abf23d
[INFO] running `Command { std: "docker" "start" "-a" "35c64beac622cfdacd02c27421362d79d7614da6789b61bf8b4d1b6813abf23d", kill_on_drop: false }`
[INFO] [stderr]    Compiling vec-option v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:379:40
[INFO] [stdout]     |
[INFO] [stdout] 379 |             let data = self.data.pop().unwrap_unchecked();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:885:41
[INFO] [stdout]     |
[INFO] [stdout] 885 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:904:45
[INFO] [stdout]     |
[INFO] [stdout] 904 |                 let data = self.data.nth(n).unwrap_unchecked();
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:916:46
[INFO] [stdout]     |
[INFO] [stdout] 916 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:955:41
[INFO] [stdout]     |
[INFO] [stdout] 955 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:968:41
[INFO] [stdout]     |
[INFO] [stdout] 968 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:979:46
[INFO] [stdout]     |
[INFO] [stdout] 979 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1008:41
[INFO] [stdout]      |
[INFO] [stdout] 1008 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1021:41
[INFO] [stdout]      |
[INFO] [stdout] 1021 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1032:46
[INFO] [stdout]      |
[INFO] [stdout] 1032 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]      |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "35c64beac622cfdacd02c27421362d79d7614da6789b61bf8b4d1b6813abf23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35c64beac622cfdacd02c27421362d79d7614da6789b61bf8b4d1b6813abf23d", kill_on_drop: false }`
[INFO] [stdout] 35c64beac622cfdacd02c27421362d79d7614da6789b61bf8b4d1b6813abf23d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ff4546d4bdf8c1229c6e5cb6e76c2288c905849124bee48d74e4443c353cdde
[INFO] running `Command { std: "docker" "start" "-a" "9ff4546d4bdf8c1229c6e5cb6e76c2288c905849124bee48d74e4443c353cdde", kill_on_drop: false }`
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:379:40
[INFO] [stdout]     |
[INFO] [stdout] 379 |             let data = self.data.pop().unwrap_unchecked();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:885:41
[INFO] [stdout]     |
[INFO] [stdout] 885 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:904:45
[INFO] [stdout]     |
[INFO] [stdout] 904 |                 let data = self.data.nth(n).unwrap_unchecked();
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:916:46
[INFO] [stdout]     |
[INFO] [stdout] 916 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:955:41
[INFO] [stdout]     |
[INFO] [stdout] 955 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:968:41
[INFO] [stdout]     |
[INFO] [stdout] 968 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:979:46
[INFO] [stdout]     |
[INFO] [stdout] 979 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling vec-option v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1008:41
[INFO] [stdout]      |
[INFO] [stdout] 1008 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1021:41
[INFO] [stdout]      |
[INFO] [stdout] 1021 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1032:46
[INFO] [stdout]      |
[INFO] [stdout] 1032 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]      |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:379:40
[INFO] [stdout]     |
[INFO] [stdout] 379 |             let data = self.data.pop().unwrap_unchecked();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:885:41
[INFO] [stdout]     |
[INFO] [stdout] 885 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:904:45
[INFO] [stdout]     |
[INFO] [stdout] 904 |                 let data = self.data.nth(n).unwrap_unchecked();
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:916:46
[INFO] [stdout]     |
[INFO] [stdout] 916 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:955:41
[INFO] [stdout]     |
[INFO] [stdout] 955 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:968:41
[INFO] [stdout]     |
[INFO] [stdout] 968 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:979:46
[INFO] [stdout]     |
[INFO] [stdout] 979 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1008:41
[INFO] [stdout]      |
[INFO] [stdout] 1008 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1021:41
[INFO] [stdout]      |
[INFO] [stdout] 1021 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/lib.rs:1032:46
[INFO] [stdout]      |
[INFO] [stdout] 1032 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stdout]      |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "9ff4546d4bdf8c1229c6e5cb6e76c2288c905849124bee48d74e4443c353cdde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ff4546d4bdf8c1229c6e5cb6e76c2288c905849124bee48d74e4443c353cdde", kill_on_drop: false }`
[INFO] [stdout] 9ff4546d4bdf8c1229c6e5cb6e76c2288c905849124bee48d74e4443c353cdde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5df353386d73999cdc6389ae1d7e2e91ded8a78eec6f5fbc40da27704a022497
[INFO] running `Command { std: "docker" "start" "-a" "5df353386d73999cdc6389ae1d7e2e91ded8a78eec6f5fbc40da27704a022497", kill_on_drop: false }`
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:379:40
[INFO] [stderr]     |
[INFO] [stderr] 379 |             let data = self.data.pop().unwrap_unchecked();
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:885:41
[INFO] [stderr]     |
[INFO] [stderr] 885 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:904:45
[INFO] [stderr]     |
[INFO] [stderr] 904 |                 let data = self.data.nth(n).unwrap_unchecked();
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:916:46
[INFO] [stderr]     |
[INFO] [stderr] 916 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:955:41
[INFO] [stderr]     |
[INFO] [stderr] 955 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:968:41
[INFO] [stderr]     |
[INFO] [stderr] 968 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:979:46
[INFO] [stderr]     |
[INFO] [stderr] 979 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/lib.rs:1008:41
[INFO] [stderr]      |
[INFO] [stderr] 1008 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/lib.rs:1021:41
[INFO] [stderr]      |
[INFO] [stderr] 1021 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/lib.rs:1032:46
[INFO] [stderr]      |
[INFO] [stderr] 1032 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stderr]      |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:379:40
[INFO] [stderr]     |
[INFO] [stderr] 379 |             let data = self.data.pop().unwrap_unchecked();
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:885:41
[INFO] [stderr]     |
[INFO] [stderr] 885 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:904:45
[INFO] [stderr]     |
[INFO] [stderr] 904 |                 let data = self.data.nth(n).unwrap_unchecked();
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:916:46
[INFO] [stderr]     |
[INFO] [stderr] 916 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:955:41
[INFO] [stderr]     |
[INFO] [stderr] 955 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:968:41
[INFO] [stderr]     |
[INFO] [stderr] 968 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/lib.rs:979:46
[INFO] [stderr]     |
[INFO] [stderr] 979 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]     = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/lib.rs:1008:41
[INFO] [stderr]      |
[INFO] [stderr] 1008 |             let data = self.data.next().unwrap_unchecked();
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/lib.rs:1021:41
[INFO] [stderr]      |
[INFO] [stderr] 1021 |             let flag = self.flag.nth(n).unwrap_unchecked();
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/lib.rs:1032:46
[INFO] [stderr]      |
[INFO] [stderr] 1032 |             let data = self.data.next_back().unwrap_unchecked();
[INFO] [stderr]      |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UnwrapUnchecked::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr]      = help: add `#![feature(option_result_unwrap_unchecked)]` to the crate attributes to enable `Option::<T>::unwrap_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/vec_option-05124ffbf224d3a7)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test bit_vec::bit_vec ... ok
[INFO] [stderr]    Doc-tests vec-option
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - (line 108) ... ignored
[INFO] [stdout] test src/lib.rs - (line 66) ... ignored
[INFO] [stdout] test src/lib.rs - (line 79) ... ignored
[INFO] [stdout] test src/lib.rs - (line 87) ... ok
[INFO] [stdout] test src/lib.rs - (line 54) ... ok
[INFO] [stdout] test src/lib.rs - (line 30) ... ok
[INFO] [stdout] test src/lib.rs - (line 120) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 3 ignored; 0 measured; 0 filtered out; finished in 0.39s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5df353386d73999cdc6389ae1d7e2e91ded8a78eec6f5fbc40da27704a022497", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5df353386d73999cdc6389ae1d7e2e91ded8a78eec6f5fbc40da27704a022497", kill_on_drop: false }`
[INFO] [stdout] 5df353386d73999cdc6389ae1d7e2e91ded8a78eec6f5fbc40da27704a022497