[INFO] fetching crate jheap_histo 0.1.0...
[INFO] checking jheap_histo-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate jheap_histo 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate jheap_histo 0.1.0 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 jheap_histo 0.1.0
[INFO] finished tweaking crates.io crate jheap_histo 0.1.0
[INFO] tweaked toml for crates.io crate jheap_histo 0.1.0 written to /workspace/builds/worker-2-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 47 packages
[INFO] [stderr]       Adding bytes v0.5.6 (latest: v1.6.0)
[INFO] [stderr]       Adding pin-project-lite v0.1.12 (latest: v0.2.14)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding tokio v0.2.25 (latest: v1.37.0)
[INFO] [stderr]       Adding tokio-macros v0.2.6 (latest: v2.2.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 4e215065bb2bd68b2aab5a707accd6ec61aaf31acda5750e4fd0f69c1c95668b
[INFO] running `Command { std: "docker" "start" "-a" "4e215065bb2bd68b2aab5a707accd6ec61aaf31acda5750e4fd0f69c1c95668b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e215065bb2bd68b2aab5a707accd6ec61aaf31acda5750e4fd0f69c1c95668b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e215065bb2bd68b2aab5a707accd6ec61aaf31acda5750e4fd0f69c1c95668b", kill_on_drop: false }`
[INFO] [stdout] 4e215065bb2bd68b2aab5a707accd6ec61aaf31acda5750e4fd0f69c1c95668b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a69a883c78a046851d776c633ae4b3ede51183e2ef34f45bae9d5d2f8c821428
[INFO] running `Command { std: "docker" "start" "-a" "a69a883c78a046851d776c633ae4b3ede51183e2ef34f45bae9d5d2f8c821428", kill_on_drop: false }`
[INFO] [stderr]     Checking combine v4.6.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking jheap_histo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `easy` is imported redundantly
[INFO] [stdout]  --> src/histo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use combine::easy;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 | use combine::*;
[INFO] [stdout]   |     ---------- the item `easy` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `easy` is imported redundantly
[INFO] [stdout]  --> src/histo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use combine::easy;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 | use combine::*;
[INFO] [stdout]   |     ---------- the item `easy` is already imported 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 8.93s
[INFO] running `Command { std: "docker" "inspect" "a69a883c78a046851d776c633ae4b3ede51183e2ef34f45bae9d5d2f8c821428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a69a883c78a046851d776c633ae4b3ede51183e2ef34f45bae9d5d2f8c821428", kill_on_drop: false }`
[INFO] [stdout] a69a883c78a046851d776c633ae4b3ede51183e2ef34f45bae9d5d2f8c821428
[INFO] checking jheap_histo-0.1.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate jheap_histo 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate jheap_histo 0.1.0 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 jheap_histo 0.1.0
[INFO] finished tweaking crates.io crate jheap_histo 0.1.0
[INFO] tweaked toml for crates.io crate jheap_histo 0.1.0 written to /workspace/builds/worker-2-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] [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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 350de7ce94fc9b422597a1974720180a82e37142e0cf2af0eaf70c9082a9ad06
[INFO] running `Command { std: "docker" "start" "-a" "350de7ce94fc9b422597a1974720180a82e37142e0cf2af0eaf70c9082a9ad06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "350de7ce94fc9b422597a1974720180a82e37142e0cf2af0eaf70c9082a9ad06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "350de7ce94fc9b422597a1974720180a82e37142e0cf2af0eaf70c9082a9ad06", kill_on_drop: false }`
[INFO] [stdout] 350de7ce94fc9b422597a1974720180a82e37142e0cf2af0eaf70c9082a9ad06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6ec83ced040386a97606cce8c0f7db84e4fe37a3aedf01842cc04fecf29ae2c2
[INFO] running `Command { std: "docker" "start" "-a" "6ec83ced040386a97606cce8c0f7db84e4fe37a3aedf01842cc04fecf29ae2c2", kill_on_drop: false }`
[INFO] [stderr]     Checking combine v4.6.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking jheap_histo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `easy` is imported redundantly
[INFO] [stdout]  --> src/histo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use combine::easy;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 | use combine::*;
[INFO] [stdout]   |     ---------- the item `easy` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `easy` is imported redundantly
[INFO] [stdout]  --> src/histo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use combine::easy;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 | use combine::*;
[INFO] [stdout]   |     ---------- the item `easy` is already imported 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 7.99s
[INFO] running `Command { std: "docker" "inspect" "6ec83ced040386a97606cce8c0f7db84e4fe37a3aedf01842cc04fecf29ae2c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ec83ced040386a97606cce8c0f7db84e4fe37a3aedf01842cc04fecf29ae2c2", kill_on_drop: false }`
[INFO] [stdout] 6ec83ced040386a97606cce8c0f7db84e4fe37a3aedf01842cc04fecf29ae2c2