[INFO] fetching crate indexer 0.2.8...
[INFO] checking indexer-0.2.8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate indexer 0.2.8 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate indexer 0.2.8 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 indexer 0.2.8
[INFO] finished tweaking crates.io crate indexer 0.2.8
[INFO] tweaked toml for crates.io crate indexer 0.2.8 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding ordered-float v1.1.1 (latest: v4.2.0)
[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 json_dotpath v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8a72b6c15ed49bb3e135a31caa00e25c9998673bf004ba790af4a47a1e83531e
[INFO] running `Command { std: "docker" "start" "-a" "8a72b6c15ed49bb3e135a31caa00e25c9998673bf004ba790af4a47a1e83531e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a72b6c15ed49bb3e135a31caa00e25c9998673bf004ba790af4a47a1e83531e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a72b6c15ed49bb3e135a31caa00e25c9998673bf004ba790af4a47a1e83531e", kill_on_drop: false }`
[INFO] [stdout] 8a72b6c15ed49bb3e135a31caa00e25c9998673bf004ba790af4a47a1e83531e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 19501b5b9bc3cd5f0d9eff61236e50ae8a1988f5283f04a9baad42786dbe6840
[INFO] running `Command { std: "docker" "start" "-a" "19501b5b9bc3cd5f0d9eff61236e50ae8a1988f5283f04a9baad42786dbe6840", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking json_dotpath v1.1.0
[INFO] [stderr]     Checking indexer v0.2.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Arc` is imported redundantly
[INFO] [stdout]  --> src/tests.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `Arc` is already imported here
[INFO] [stdout] 3 | use std::sync::{Arc, RwLock};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RwLock` is imported redundantly
[INFO] [stdout]  --> src/tests.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `RwLock` is already imported here
[INFO] [stdout] 3 | use std::sync::{Arc, RwLock};
[INFO] [stdout]   |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Op` is imported redundantly
[INFO] [stdout]    --> src/tests.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 2   | use crate::*;
[INFO] [stdout]     |     -------- the item `Op` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 107 | use crate::Op;
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.05s
[INFO] running `Command { std: "docker" "inspect" "19501b5b9bc3cd5f0d9eff61236e50ae8a1988f5283f04a9baad42786dbe6840", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19501b5b9bc3cd5f0d9eff61236e50ae8a1988f5283f04a9baad42786dbe6840", kill_on_drop: false }`
[INFO] [stdout] 19501b5b9bc3cd5f0d9eff61236e50ae8a1988f5283f04a9baad42786dbe6840
[INFO] checking indexer-0.2.8 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate indexer 0.2.8 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate indexer 0.2.8 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 indexer 0.2.8
[INFO] finished tweaking crates.io crate indexer 0.2.8
[INFO] tweaked toml for crates.io crate indexer 0.2.8 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 65594d3a2c3f99001d2571b142c5cf65895e93fbdb2c8c47fcc9af96b4adad83
[INFO] running `Command { std: "docker" "start" "-a" "65594d3a2c3f99001d2571b142c5cf65895e93fbdb2c8c47fcc9af96b4adad83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65594d3a2c3f99001d2571b142c5cf65895e93fbdb2c8c47fcc9af96b4adad83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65594d3a2c3f99001d2571b142c5cf65895e93fbdb2c8c47fcc9af96b4adad83", kill_on_drop: false }`
[INFO] [stdout] 65594d3a2c3f99001d2571b142c5cf65895e93fbdb2c8c47fcc9af96b4adad83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ffee699090c7fdc2bf61e52f335147091e2233eb9b76ff71fb5138181c906641
[INFO] running `Command { std: "docker" "start" "-a" "ffee699090c7fdc2bf61e52f335147091e2233eb9b76ff71fb5138181c906641", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking json_dotpath v1.1.0
[INFO] [stderr]     Checking indexer v0.2.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Arc` is imported redundantly
[INFO] [stdout]  --> src/tests.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `Arc` is already imported here
[INFO] [stdout] 3 | use std::sync::{Arc, RwLock};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RwLock` is imported redundantly
[INFO] [stdout]  --> src/tests.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `RwLock` is already imported here
[INFO] [stdout] 3 | use std::sync::{Arc, RwLock};
[INFO] [stdout]   |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Op` is imported redundantly
[INFO] [stdout]    --> src/tests.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 2   | use crate::*;
[INFO] [stdout]     |     -------- the item `Op` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 107 | use crate::Op;
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.75s
[INFO] running `Command { std: "docker" "inspect" "ffee699090c7fdc2bf61e52f335147091e2233eb9b76ff71fb5138181c906641", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffee699090c7fdc2bf61e52f335147091e2233eb9b76ff71fb5138181c906641", kill_on_drop: false }`
[INFO] [stdout] ffee699090c7fdc2bf61e52f335147091e2233eb9b76ff71fb5138181c906641