[INFO] fetching crate allocator-api2 0.2.16...
[INFO] checking allocator-api2-0.2.16 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-2
[INFO] extracting crate allocator-api2 0.2.16 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate allocator-api2 0.2.16 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate allocator-api2 0.2.16
[INFO] finished tweaking crates.io crate allocator-api2 0.2.16
[INFO] tweaked toml for crates.io crate allocator-api2 0.2.16 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9768e097392817a7f53d59ab9cad94dd91f67a0011d2983cd46e8fcb91f7263a
[INFO] running `Command { std: "docker" "start" "-a" "9768e097392817a7f53d59ab9cad94dd91f67a0011d2983cd46e8fcb91f7263a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9768e097392817a7f53d59ab9cad94dd91f67a0011d2983cd46e8fcb91f7263a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9768e097392817a7f53d59ab9cad94dd91f67a0011d2983cd46e8fcb91f7263a", kill_on_drop: false }`
[INFO] [stdout] 9768e097392817a7f53d59ab9cad94dd91f67a0011d2983cd46e8fcb91f7263a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c90d8152ae20dda118aba313a5766a0a30d654fbcd4942911e647c46eb17fab3
[INFO] running `Command { std: "docker" "start" "-a" "c90d8152ae20dda118aba313a5766a0a30d654fbcd4942911e647c46eb17fab3", kill_on_drop: false }`
[INFO] [stderr]     Checking allocator-api2 v0.2.16 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `handle_alloc_error`
[INFO] [stdout]  --> src/stable/alloc/global.rs:4:60
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc_crate::alloc::{alloc, alloc_zeroed, dealloc, handle_alloc_error, realloc};
[INFO] [stdout]   |                                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]    --> src/stable/boxed.rs:150:21
[INFO] [stdout]     |
[INFO] [stdout] 150 | use core::convert::{From, TryFrom};
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]    --> src/stable/boxed.rs:158:33
[INFO] [stdout]     |
[INFO] [stdout] 158 | use core::iter::{FusedIterator, Iterator};
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Unpin` is imported redundantly
[INFO] [stdout]    --> src/stable/boxed.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | use core::marker::Unpin;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Unpin` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Drop` is imported redundantly
[INFO] [stdout]  --> src/stable/raw_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::ops::Drop;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Drop` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `handle_alloc_error`
[INFO] [stdout]  --> src/stable/alloc/global.rs:4:60
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc_crate::alloc::{alloc, alloc_zeroed, dealloc, handle_alloc_error, realloc};
[INFO] [stdout]   |                                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]    --> src/stable/boxed.rs:150:21
[INFO] [stdout]     |
[INFO] [stdout] 150 | use core::convert::{From, TryFrom};
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]    --> src/stable/boxed.rs:158:33
[INFO] [stdout]     |
[INFO] [stdout] 158 | use core::iter::{FusedIterator, Iterator};
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Unpin` is imported redundantly
[INFO] [stdout]    --> src/stable/boxed.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | use core::marker::Unpin;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Unpin` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Drop` is imported redundantly
[INFO] [stdout]  --> src/stable/raw_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::ops::Drop;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Drop` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExtendFromWithinSpec` is never used
[INFO] [stdout]     --> src/stable/vec/mod.rs:2545:7
[INFO] [stdout]      |
[INFO] [stdout] 2545 | trait ExtendFromWithinSpec {
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `NonDrop` is never used
[INFO] [stdout]    --> src/stable/vec/into_iter.rs:161:11
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub trait NonDrop {}
[INFO] [stdout]     |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExtendFromWithinSpec` is never used
[INFO] [stdout]     --> src/stable/vec/mod.rs:2545:7
[INFO] [stdout]      |
[INFO] [stdout] 2545 | trait ExtendFromWithinSpec {
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `NonDrop` is never used
[INFO] [stdout]    --> src/stable/vec/into_iter.rs:161:11
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub trait NonDrop {}
[INFO] [stdout]     |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "c90d8152ae20dda118aba313a5766a0a30d654fbcd4942911e647c46eb17fab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c90d8152ae20dda118aba313a5766a0a30d654fbcd4942911e647c46eb17fab3", kill_on_drop: false }`
[INFO] [stdout] c90d8152ae20dda118aba313a5766a0a30d654fbcd4942911e647c46eb17fab3