[INFO] fetching crate nix-nar 0.3.0...
[INFO] checking nix-nar-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate nix-nar 0.3.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate nix-nar 0.3.0 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 nix-nar 0.3.0
[INFO] finished tweaking crates.io crate nix-nar 0.3.0
[INFO] tweaked toml for crates.io crate nix-nar 0.3.0 written to /workspace/builds/worker-3-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 56 packages
[INFO] [stderr]       Adding encode_unicode v0.3.6 (latest: v1.0.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding pretty-hex v0.3.0 (latest: v0.4.1)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded ctor v0.2.7
[INFO] [stderr]   Downloaded is_executable v1.0.1
[INFO] [stderr]   Downloaded symlink v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b60dfc9dc0554a12200a384de07060b1bfbf2c43bd53a8edbd433bfd4a45bb55
[INFO] running `Command { std: "docker" "start" "-a" "b60dfc9dc0554a12200a384de07060b1bfbf2c43bd53a8edbd433bfd4a45bb55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b60dfc9dc0554a12200a384de07060b1bfbf2c43bd53a8edbd433bfd4a45bb55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b60dfc9dc0554a12200a384de07060b1bfbf2c43bd53a8edbd433bfd4a45bb55", kill_on_drop: false }`
[INFO] [stdout] b60dfc9dc0554a12200a384de07060b1bfbf2c43bd53a8edbd433bfd4a45bb55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] bc6fb9c4c6b16465240e0c2fb9a365b57d18cd3fccbf0efe6118fc34eb99bec5
[INFO] running `Command { std: "docker" "start" "-a" "bc6fb9c4c6b16465240e0c2fb9a365b57d18cd3fccbf0efe6118fc34eb99bec5", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking symlink v0.1.0
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking is_executable v1.0.1
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking similar v2.5.0
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking pretty-hex v0.3.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking insta v1.38.0
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling ctor v0.2.7
[INFO] [stderr]     Checking ignore v0.4.22
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking nix-nar v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.21s
[INFO] running `Command { std: "docker" "inspect" "bc6fb9c4c6b16465240e0c2fb9a365b57d18cd3fccbf0efe6118fc34eb99bec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc6fb9c4c6b16465240e0c2fb9a365b57d18cd3fccbf0efe6118fc34eb99bec5", kill_on_drop: false }`
[INFO] [stdout] bc6fb9c4c6b16465240e0c2fb9a365b57d18cd3fccbf0efe6118fc34eb99bec5
[INFO] checking nix-nar-0.3.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate nix-nar 0.3.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate nix-nar 0.3.0 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 nix-nar 0.3.0
[INFO] finished tweaking crates.io crate nix-nar 0.3.0
[INFO] tweaked toml for crates.io crate nix-nar 0.3.0 written to /workspace/builds/worker-3-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 37a5a258b41d73cb300c50afa955b984c91b1141cd1e3986d6dc5085a7a12f55
[INFO] running `Command { std: "docker" "start" "-a" "37a5a258b41d73cb300c50afa955b984c91b1141cd1e3986d6dc5085a7a12f55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37a5a258b41d73cb300c50afa955b984c91b1141cd1e3986d6dc5085a7a12f55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37a5a258b41d73cb300c50afa955b984c91b1141cd1e3986d6dc5085a7a12f55", kill_on_drop: false }`
[INFO] [stdout] 37a5a258b41d73cb300c50afa955b984c91b1141cd1e3986d6dc5085a7a12f55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] d45c95a5761a8b8bbdfa1a9c6c4eab3d331d830ccd66007460036f4018aa30d3
[INFO] running `Command { std: "docker" "start" "-a" "d45c95a5761a8b8bbdfa1a9c6c4eab3d331d830ccd66007460036f4018aa30d3", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking similar v2.5.0
[INFO] [stderr]     Checking symlink v0.1.0
[INFO] [stderr]     Checking is_executable v1.0.1
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]     Checking pretty-hex v0.3.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking insta v1.38.0
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling ctor v0.2.7
[INFO] [stderr]     Checking ignore v0.4.22
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking nix-nar v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.00s
[INFO] running `Command { std: "docker" "inspect" "d45c95a5761a8b8bbdfa1a9c6c4eab3d331d830ccd66007460036f4018aa30d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d45c95a5761a8b8bbdfa1a9c6c4eab3d331d830ccd66007460036f4018aa30d3", kill_on_drop: false }`
[INFO] [stdout] d45c95a5761a8b8bbdfa1a9c6c4eab3d331d830ccd66007460036f4018aa30d3