[INFO] fetching crate uefc 0.2.1...
[INFO] checking uefc-0.2.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate uefc 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate uefc 0.2.1 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 uefc 0.2.1
[INFO] finished tweaking crates.io crate uefc 0.2.1
[INFO] tweaked toml for crates.io crate uefc 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate uefc 0.2.1 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]  Downloading crates ...
[INFO] [stderr]   Downloaded console v0.15.5
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.7
[INFO] [stderr]   Downloaded portable-atomic v0.3.19
[INFO] [stderr]   Downloaded indicatif v0.17.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ab117fb19c765e19e027744f6643f703d13d9d5256e5da3ba1b47fb2eaed4fda
[INFO] running `Command { std: "docker" "start" "-a" "ab117fb19c765e19e027744f6643f703d13d9d5256e5da3ba1b47fb2eaed4fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab117fb19c765e19e027744f6643f703d13d9d5256e5da3ba1b47fb2eaed4fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab117fb19c765e19e027744f6643f703d13d9d5256e5da3ba1b47fb2eaed4fda", kill_on_drop: false }`
[INFO] [stdout] ab117fb19c765e19e027744f6643f703d13d9d5256e5da3ba1b47fb2eaed4fda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 3cb38e3d1ff0b3d45cbdb5f44e2970993fefbab2748d78b71769b186ee7b5a42
[INFO] running `Command { std: "docker" "start" "-a" "3cb38e3d1ff0b3d45cbdb5f44e2970993fefbab2748d78b71769b186ee7b5a42", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling portable-atomic v0.3.19
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking console v0.15.5
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking indicatif v0.17.3
[INFO] [stderr]     Checking uefc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/opt_options.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/opt_options.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.12s
[INFO] running `Command { std: "docker" "inspect" "3cb38e3d1ff0b3d45cbdb5f44e2970993fefbab2748d78b71769b186ee7b5a42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb38e3d1ff0b3d45cbdb5f44e2970993fefbab2748d78b71769b186ee7b5a42", kill_on_drop: false }`
[INFO] [stdout] 3cb38e3d1ff0b3d45cbdb5f44e2970993fefbab2748d78b71769b186ee7b5a42
[INFO] checking uefc-0.2.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate uefc 0.2.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate uefc 0.2.1 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 uefc 0.2.1
[INFO] finished tweaking crates.io crate uefc 0.2.1
[INFO] tweaked toml for crates.io crate uefc 0.2.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate uefc 0.2.1 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 4005c98213cf93eece9bb32f6272d4e0eacde81da3055c8f549527fd727c557c
[INFO] running `Command { std: "docker" "start" "-a" "4005c98213cf93eece9bb32f6272d4e0eacde81da3055c8f549527fd727c557c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4005c98213cf93eece9bb32f6272d4e0eacde81da3055c8f549527fd727c557c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4005c98213cf93eece9bb32f6272d4e0eacde81da3055c8f549527fd727c557c", kill_on_drop: false }`
[INFO] [stdout] 4005c98213cf93eece9bb32f6272d4e0eacde81da3055c8f549527fd727c557c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 4200189c7ab50903f16b01ea271a66c4c29814604d3786774986135ce9eb2a49
[INFO] running `Command { std: "docker" "start" "-a" "4200189c7ab50903f16b01ea271a66c4c29814604d3786774986135ce9eb2a49", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling portable-atomic v0.3.19
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking console v0.15.5
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking indicatif v0.17.3
[INFO] [stderr]     Checking uefc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/opt_options.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/opt_options.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.78s
[INFO] running `Command { std: "docker" "inspect" "4200189c7ab50903f16b01ea271a66c4c29814604d3786774986135ce9eb2a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4200189c7ab50903f16b01ea271a66c4c29814604d3786774986135ce9eb2a49", kill_on_drop: false }`
[INFO] [stdout] 4200189c7ab50903f16b01ea271a66c4c29814604d3786774986135ce9eb2a49