[INFO] fetching crate nbt-parser 1.0.0...
[INFO] checking nbt-parser-1.0.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate nbt-parser 1.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate nbt-parser 1.0.0 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 nbt-parser 1.0.0
[INFO] finished tweaking crates.io crate nbt-parser 1.0.0
[INFO] tweaked toml for crates.io crate nbt-parser 1.0.0 written to /workspace/builds/worker-4-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 31 packages
[INFO] [stderr]       Adding ascii v0.9.3 (latest: v1.1.0)
[INFO] [stderr]       Adding combine v3.8.1 (latest: v4.6.6)
[INFO] [stderr]       Adding libflate v0.1.27 (latest: v2.0.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[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] 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] aeaf1b3ad35dc715386fd96c30aa6006aa9ef02d6453a1af0ac568ba829e9913
[INFO] running `Command { std: "docker" "start" "-a" "aeaf1b3ad35dc715386fd96c30aa6006aa9ef02d6453a1af0ac568ba829e9913", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aeaf1b3ad35dc715386fd96c30aa6006aa9ef02d6453a1af0ac568ba829e9913", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeaf1b3ad35dc715386fd96c30aa6006aa9ef02d6453a1af0ac568ba829e9913", kill_on_drop: false }`
[INFO] [stdout] aeaf1b3ad35dc715386fd96c30aa6006aa9ef02d6453a1af0ac568ba829e9913
[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] ed79d27a8f5078484324d80a28ab7b8e03ea3483b307e30ce423615ffe8e988f
[INFO] running `Command { std: "docker" "start" "-a" "ed79d27a8f5078484324d80a28ab7b8e03ea3483b307e30ce423615ffe8e988f", kill_on_drop: false }`
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking rle-decode-fast v1.0.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking libflate v0.1.27
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking nbt-parser v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.68s
[INFO] running `Command { std: "docker" "inspect" "ed79d27a8f5078484324d80a28ab7b8e03ea3483b307e30ce423615ffe8e988f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed79d27a8f5078484324d80a28ab7b8e03ea3483b307e30ce423615ffe8e988f", kill_on_drop: false }`
[INFO] [stdout] ed79d27a8f5078484324d80a28ab7b8e03ea3483b307e30ce423615ffe8e988f
[INFO] checking nbt-parser-1.0.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate nbt-parser 1.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate nbt-parser 1.0.0 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 nbt-parser 1.0.0
[INFO] finished tweaking crates.io crate nbt-parser 1.0.0
[INFO] tweaked toml for crates.io crate nbt-parser 1.0.0 written to /workspace/builds/worker-4-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]     Blocking waiting for file lock on package cache
[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] 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] 4f6a0abf5b5934900a526685dd660239248d8f1db8f96d2411bdf96c7f2f54bb
[INFO] running `Command { std: "docker" "start" "-a" "4f6a0abf5b5934900a526685dd660239248d8f1db8f96d2411bdf96c7f2f54bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f6a0abf5b5934900a526685dd660239248d8f1db8f96d2411bdf96c7f2f54bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f6a0abf5b5934900a526685dd660239248d8f1db8f96d2411bdf96c7f2f54bb", kill_on_drop: false }`
[INFO] [stdout] 4f6a0abf5b5934900a526685dd660239248d8f1db8f96d2411bdf96c7f2f54bb
[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] 412a619cf6602c76ce1b69823b7841f47f0420d76c16871d82fc645ff844566d
[INFO] running `Command { std: "docker" "start" "-a" "412a619cf6602c76ce1b69823b7841f47f0420d76c16871d82fc645ff844566d", kill_on_drop: false }`
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking rle-decode-fast v1.0.3
[INFO] [stderr]     Checking libflate v0.1.27
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking nbt-parser v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.97s
[INFO] running `Command { std: "docker" "inspect" "412a619cf6602c76ce1b69823b7841f47f0420d76c16871d82fc645ff844566d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "412a619cf6602c76ce1b69823b7841f47f0420d76c16871d82fc645ff844566d", kill_on_drop: false }`
[INFO] [stdout] 412a619cf6602c76ce1b69823b7841f47f0420d76c16871d82fc645ff844566d