[INFO] cloning repository https://github.com/drahnr/overlay-fs-gen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drahnr/overlay-fs-gen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrahnr%2Foverlay-fs-gen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrahnr%2Foverlay-fs-gen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d923033806877a2af1d2a504ec92f897b5721ea9
[INFO] checking drahnr/overlay-fs-gen against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrahnr%2Foverlay-fs-gen" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/drahnr/overlay-fs-gen 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 git repo https://github.com/drahnr/overlay-fs-gen
[INFO] finished tweaking git repo https://github.com/drahnr/overlay-fs-gen
[INFO] tweaked toml for git repo https://github.com/drahnr/overlay-fs-gen written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/drahnr/overlay-fs-gen 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]     Updating git repository `https://github.com/drahnr/libmount`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.62
[INFO] [stderr]   Downloaded loom v0.3.6
[INFO] [stderr]   Downloaded fs-err v2.5.0
[INFO] [stderr]   Downloaded sharded-slab v0.1.0
[INFO] [stderr]   Downloaded color-spantrace v0.1.4
[INFO] [stderr]   Downloaded eyre v0.6.3
[INFO] [stderr]   Downloaded owo-colors v1.1.3
[INFO] [stderr]   Downloaded nix v0.19.0
[INFO] [stderr]   Downloaded color-eyre v0.5.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 7364341f11d0efcec0572ac2b8a38fd5ccc774c69879e10ac55bad00ddb0b55a
[INFO] running `Command { std: "docker" "start" "-a" "7364341f11d0efcec0572ac2b8a38fd5ccc774c69879e10ac55bad00ddb0b55a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7364341f11d0efcec0572ac2b8a38fd5ccc774c69879e10ac55bad00ddb0b55a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7364341f11d0efcec0572ac2b8a38fd5ccc774c69879e10ac55bad00ddb0b55a", kill_on_drop: false }`
[INFO] [stdout] 7364341f11d0efcec0572ac2b8a38fd5ccc774c69879e10ac55bad00ddb0b55a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e503b3089e250b0fdc84a4b9aed8bf9f179fe93367a9aa0dcfb6d4d605ddda3a
[INFO] running `Command { std: "docker" "start" "-a" "e503b3089e250b0fdc84a4b9aed8bf9f179fe93367a9aa0dcfb6d4d605ddda3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling eyre v0.6.3
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking indenter v0.3.0
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking owo-colors v1.1.3
[INFO] [stderr]     Checking fs-err v2.5.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking nix v0.19.0
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking libmount v0.1.15 (https://github.com/drahnr/libmount#43c86f1d)
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]     Checking color-spantrace v0.1.4
[INFO] [stderr]     Checking color-eyre v0.5.7
[INFO] [stderr]     Checking overlay-fs-gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use color_eyre::eyre::*;
[INFO] [stdout]   |     ------------------- the item `Result` is already imported here
[INFO] [stdout] 2 | use color_eyre::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use color_eyre::eyre::*;
[INFO] [stdout]   |     ------------------- the item `Result` is already imported here
[INFO] [stdout] 2 | use color_eyre::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[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 10.56s
[INFO] running `Command { std: "docker" "inspect" "e503b3089e250b0fdc84a4b9aed8bf9f179fe93367a9aa0dcfb6d4d605ddda3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e503b3089e250b0fdc84a4b9aed8bf9f179fe93367a9aa0dcfb6d4d605ddda3a", kill_on_drop: false }`
[INFO] [stdout] e503b3089e250b0fdc84a4b9aed8bf9f179fe93367a9aa0dcfb6d4d605ddda3a
[INFO] checking drahnr/overlay-fs-gen against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrahnr%2Foverlay-fs-gen" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/drahnr/overlay-fs-gen 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 git repo https://github.com/drahnr/overlay-fs-gen
[INFO] finished tweaking git repo https://github.com/drahnr/overlay-fs-gen
[INFO] tweaked toml for git repo https://github.com/drahnr/overlay-fs-gen written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/drahnr/overlay-fs-gen 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ad98c2261079c252b879a2a0563c1c6b08fe84b537aa2bd6c1a1a09537bc42ed
[INFO] running `Command { std: "docker" "start" "-a" "ad98c2261079c252b879a2a0563c1c6b08fe84b537aa2bd6c1a1a09537bc42ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad98c2261079c252b879a2a0563c1c6b08fe84b537aa2bd6c1a1a09537bc42ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad98c2261079c252b879a2a0563c1c6b08fe84b537aa2bd6c1a1a09537bc42ed", kill_on_drop: false }`
[INFO] [stdout] ad98c2261079c252b879a2a0563c1c6b08fe84b537aa2bd6c1a1a09537bc42ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 24e9984004f6ae391d751fe19b9cbe288cfbe57632b46becb7ea3861313cc7e4
[INFO] running `Command { std: "docker" "start" "-a" "24e9984004f6ae391d751fe19b9cbe288cfbe57632b46becb7ea3861313cc7e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling eyre v0.6.3
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking indenter v0.3.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking fs-err v2.5.0
[INFO] [stderr]     Checking owo-colors v1.1.3
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking nix v0.19.0
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking libmount v0.1.15 (https://github.com/drahnr/libmount#43c86f1d)
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]     Checking color-spantrace v0.1.4
[INFO] [stderr]     Checking color-eyre v0.5.7
[INFO] [stderr]     Checking overlay-fs-gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use color_eyre::eyre::*;
[INFO] [stdout]   |     ------------------- the item `Result` is already imported here
[INFO] [stdout] 2 | use color_eyre::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use color_eyre::eyre::*;
[INFO] [stdout]   |     ------------------- the item `Result` is already imported here
[INFO] [stdout] 2 | use color_eyre::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[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 11.67s
[INFO] running `Command { std: "docker" "inspect" "24e9984004f6ae391d751fe19b9cbe288cfbe57632b46becb7ea3861313cc7e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e9984004f6ae391d751fe19b9cbe288cfbe57632b46becb7ea3861313cc7e4", kill_on_drop: false }`
[INFO] [stdout] 24e9984004f6ae391d751fe19b9cbe288cfbe57632b46becb7ea3861313cc7e4