[INFO] fetching crate toy-apcb 0.2.0...
[INFO] checking toy-apcb-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate toy-apcb 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate toy-apcb 0.2.0 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 toy-apcb 0.2.0
[INFO] finished tweaking crates.io crate toy-apcb 0.2.0
[INFO] tweaked toml for crates.io crate toy-apcb 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate toy-apcb 0.2.0 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 zerocopy v0.6.1
[INFO] [stderr]   Downloaded zerocopy-derive v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1546ee637398591c22084217cae26974a45805014f7fe805919a8730a4fe1808
[INFO] running `Command { std: "docker" "start" "-a" "1546ee637398591c22084217cae26974a45805014f7fe805919a8730a4fe1808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1546ee637398591c22084217cae26974a45805014f7fe805919a8730a4fe1808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1546ee637398591c22084217cae26974a45805014f7fe805919a8730a4fe1808", kill_on_drop: false }`
[INFO] [stdout] 1546ee637398591c22084217cae26974a45805014f7fe805919a8730a4fe1808
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 52f41415d89ae3a45b7919d1d1dac9a38cda6ae908b1d4a931625aabc2e352f7
[INFO] running `Command { std: "docker" "start" "-a" "52f41415d89ae3a45b7919d1d1dac9a38cda6ae908b1d4a931625aabc2e352f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.181
[INFO] [stderr]    Compiling serde_derive v1.0.181
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling zerocopy-derive v0.3.2
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking zerocopy v0.6.1
[INFO] [stderr]     Checking modular-bitfield v0.11.2
[INFO] [stderr]     Checking toy-apcb v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]     --> src/main.rs:1325:9
[INFO] [stdout]      |
[INFO] [stdout] 1325 |     let config = SerdeConfig::SlinkConfig(
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]     --> src/main.rs:1325:9
[INFO] [stdout]      |
[INFO] [stdout] 1325 |     let config = SerdeConfig::SlinkConfig(
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` 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 8.07s
[INFO] running `Command { std: "docker" "inspect" "52f41415d89ae3a45b7919d1d1dac9a38cda6ae908b1d4a931625aabc2e352f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52f41415d89ae3a45b7919d1d1dac9a38cda6ae908b1d4a931625aabc2e352f7", kill_on_drop: false }`
[INFO] [stdout] 52f41415d89ae3a45b7919d1d1dac9a38cda6ae908b1d4a931625aabc2e352f7
[INFO] checking toy-apcb-0.2.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate toy-apcb 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate toy-apcb 0.2.0 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 toy-apcb 0.2.0
[INFO] finished tweaking crates.io crate toy-apcb 0.2.0
[INFO] tweaked toml for crates.io crate toy-apcb 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate toy-apcb 0.2.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 25a4b6fe27ed70ab37b6ae0517309521f3dcf212a02efcd54d0ac0534eb207f3
[INFO] running `Command { std: "docker" "start" "-a" "25a4b6fe27ed70ab37b6ae0517309521f3dcf212a02efcd54d0ac0534eb207f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25a4b6fe27ed70ab37b6ae0517309521f3dcf212a02efcd54d0ac0534eb207f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25a4b6fe27ed70ab37b6ae0517309521f3dcf212a02efcd54d0ac0534eb207f3", kill_on_drop: false }`
[INFO] [stdout] 25a4b6fe27ed70ab37b6ae0517309521f3dcf212a02efcd54d0ac0534eb207f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] acb1e380e778b02851bcdfcd2eb03e5448885141587190d8f9327056c2c1ee7c
[INFO] running `Command { std: "docker" "start" "-a" "acb1e380e778b02851bcdfcd2eb03e5448885141587190d8f9327056c2c1ee7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.181
[INFO] [stderr]    Compiling serde_derive v1.0.181
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling zerocopy-derive v0.3.2
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking zerocopy v0.6.1
[INFO] [stderr]     Checking modular-bitfield v0.11.2
[INFO] [stderr]     Checking toy-apcb v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]     --> src/main.rs:1325:9
[INFO] [stdout]      |
[INFO] [stdout] 1325 |     let config = SerdeConfig::SlinkConfig(
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]     --> src/main.rs:1325:9
[INFO] [stdout]      |
[INFO] [stdout] 1325 |     let config = SerdeConfig::SlinkConfig(
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` 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 9.68s
[INFO] running `Command { std: "docker" "inspect" "acb1e380e778b02851bcdfcd2eb03e5448885141587190d8f9327056c2c1ee7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acb1e380e778b02851bcdfcd2eb03e5448885141587190d8f9327056c2c1ee7c", kill_on_drop: false }`
[INFO] [stdout] acb1e380e778b02851bcdfcd2eb03e5448885141587190d8f9327056c2c1ee7c