[INFO] fetching crate sliding_window_alt 0.1.2...
[INFO] checking sliding_window_alt-0.1.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate sliding_window_alt 0.1.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate sliding_window_alt 0.1.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sliding_window_alt 0.1.2
[INFO] finished tweaking crates.io crate sliding_window_alt 0.1.2
[INFO] tweaked toml for crates.io crate sliding_window_alt 0.1.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate sliding_window_alt 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--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]  Downloading crates ...
[INFO] [stderr]   Downloaded sliding_window v0.1.2
[INFO] [stderr]   Downloaded queues v1.1.0
[INFO] [stderr]   Downloaded quote v1.0.17
[INFO] [stderr]   Downloaded circular-queue v0.2.6
[INFO] [stderr]   Downloaded semver v1.0.7
[INFO] [stderr]   Downloaded libc v0.2.122
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c461b9c64a0bcba6d6d53cba695f7b050d7f6d161c80523297ba3b3bb9734ac3
[INFO] running `Command { std: "docker" "start" "-a" "c461b9c64a0bcba6d6d53cba695f7b050d7f6d161c80523297ba3b3bb9734ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c461b9c64a0bcba6d6d53cba695f7b050d7f6d161c80523297ba3b3bb9734ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c461b9c64a0bcba6d6d53cba695f7b050d7f6d161c80523297ba3b3bb9734ac3", kill_on_drop: false }`
[INFO] [stdout] c461b9c64a0bcba6d6d53cba695f7b050d7f6d161c80523297ba3b3bb9734ac3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c30f8f184b729c439a6e0ee9ef4a4219299766924e347a5628ea896c578496f3
[INFO] running `Command { std: "docker" "start" "-a" "c30f8f184b729c439a6e0ee9ef4a4219299766924e347a5628ea896c578496f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling semver v1.0.7
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling libc v0.2.122
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]    Compiling circular-queue v0.2.6
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking queues v1.1.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking sliding_window_alt v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::iter::{Chain, Iterator};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.17
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking sliding_window v0.1.2
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::iter::{Chain, Iterator};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.89s
[INFO] running `Command { std: "docker" "inspect" "c30f8f184b729c439a6e0ee9ef4a4219299766924e347a5628ea896c578496f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c30f8f184b729c439a6e0ee9ef4a4219299766924e347a5628ea896c578496f3", kill_on_drop: false }`
[INFO] [stdout] c30f8f184b729c439a6e0ee9ef4a4219299766924e347a5628ea896c578496f3
[INFO] checking sliding_window_alt-0.1.2 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate sliding_window_alt 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate sliding_window_alt 0.1.2 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sliding_window_alt 0.1.2
[INFO] finished tweaking crates.io crate sliding_window_alt 0.1.2
[INFO] tweaked toml for crates.io crate sliding_window_alt 0.1.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate sliding_window_alt 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01cc3437aa23ecdf25ed7ef793e87f6b098f8336720fce0d5c51b0f2c95e2b68
[INFO] running `Command { std: "docker" "start" "-a" "01cc3437aa23ecdf25ed7ef793e87f6b098f8336720fce0d5c51b0f2c95e2b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01cc3437aa23ecdf25ed7ef793e87f6b098f8336720fce0d5c51b0f2c95e2b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01cc3437aa23ecdf25ed7ef793e87f6b098f8336720fce0d5c51b0f2c95e2b68", kill_on_drop: false }`
[INFO] [stdout] 01cc3437aa23ecdf25ed7ef793e87f6b098f8336720fce0d5c51b0f2c95e2b68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1cf8f4d97fb89f65b8b39034dea93eac81c83c1a6372d1d9694da852f4ddc63
[INFO] running `Command { std: "docker" "start" "-a" "f1cf8f4d97fb89f65b8b39034dea93eac81c83c1a6372d1d9694da852f4ddc63", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.7
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling libc v0.2.122
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]    Compiling circular-queue v0.2.6
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking queues v1.1.0
[INFO] [stderr]     Checking sliding_window_alt v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::iter::{Chain, Iterator};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]    Compiling quote v1.0.17
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking sliding_window v0.1.2
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::iter::{Chain, Iterator};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.90s
[INFO] running `Command { std: "docker" "inspect" "f1cf8f4d97fb89f65b8b39034dea93eac81c83c1a6372d1d9694da852f4ddc63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1cf8f4d97fb89f65b8b39034dea93eac81c83c1a6372d1d9694da852f4ddc63", kill_on_drop: false }`
[INFO] [stdout] f1cf8f4d97fb89f65b8b39034dea93eac81c83c1a6372d1d9694da852f4ddc63