[INFO] cloning repository https://github.com/hbina/tws
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hbina/tws" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhbina%2Ftws", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhbina%2Ftws'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1523f4c0e276cea44236ef8ae68f305cff9b20c6
[INFO] checking hbina/tws against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhbina%2Ftws" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hbina/tws 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/hbina/tws
[INFO] finished tweaking git repo https://github.com/hbina/tws
[INFO] tweaked toml for git repo https://github.com/hbina/tws written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hbina/tws 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] 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] 57a7c8d69dbf9a75a8b2d1ed20b13e9ac5e4f28078e2e8ffe4a07c40ebd0517d
[INFO] running `Command { std: "docker" "start" "-a" "57a7c8d69dbf9a75a8b2d1ed20b13e9ac5e4f28078e2e8ffe4a07c40ebd0517d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57a7c8d69dbf9a75a8b2d1ed20b13e9ac5e4f28078e2e8ffe4a07c40ebd0517d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57a7c8d69dbf9a75a8b2d1ed20b13e9ac5e4f28078e2e8ffe4a07c40ebd0517d", kill_on_drop: false }`
[INFO] [stdout] 57a7c8d69dbf9a75a8b2d1ed20b13e9ac5e4f28078e2e8ffe4a07c40ebd0517d
[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] c4d271e4387f89020621ce534c6adfe5dfc0f0eeb0207f3b750646ad423b3c1d
[INFO] running `Command { std: "docker" "start" "-a" "c4d271e4387f89020621ce534c6adfe5dfc0f0eeb0207f3b750646ad423b3c1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking serde_yaml v0.8.23
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking twilight-sparkle v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Solver` is never used
[INFO] [stdout]   --> src/parsers/lib.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 | trait Solver {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solver` is never used
[INFO] [stdout]   --> src/parsers/lib.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 | trait Solver {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 17.74s
[INFO] running `Command { std: "docker" "inspect" "c4d271e4387f89020621ce534c6adfe5dfc0f0eeb0207f3b750646ad423b3c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d271e4387f89020621ce534c6adfe5dfc0f0eeb0207f3b750646ad423b3c1d", kill_on_drop: false }`
[INFO] [stdout] c4d271e4387f89020621ce534c6adfe5dfc0f0eeb0207f3b750646ad423b3c1d
[INFO] checking hbina/tws against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhbina%2Ftws" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hbina/tws 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/hbina/tws
[INFO] finished tweaking git repo https://github.com/hbina/tws
[INFO] tweaked toml for git repo https://github.com/hbina/tws written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hbina/tws 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-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] 4dd84cb21ee72c9b90db63129389e7fd092ba7edae4f2743aae8190e8c80482f
[INFO] running `Command { std: "docker" "start" "-a" "4dd84cb21ee72c9b90db63129389e7fd092ba7edae4f2743aae8190e8c80482f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dd84cb21ee72c9b90db63129389e7fd092ba7edae4f2743aae8190e8c80482f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dd84cb21ee72c9b90db63129389e7fd092ba7edae4f2743aae8190e8c80482f", kill_on_drop: false }`
[INFO] [stdout] 4dd84cb21ee72c9b90db63129389e7fd092ba7edae4f2743aae8190e8c80482f
[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] 6372d2d2d7e3cf7707da8086ebcf5ad3b3d050e8e63b4267ec18aaa328ec1f7f
[INFO] running `Command { std: "docker" "start" "-a" "6372d2d2d7e3cf7707da8086ebcf5ad3b3d050e8e63b4267ec18aaa328ec1f7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking serde_yaml v0.8.23
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking twilight-sparkle v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Solver` is never used
[INFO] [stdout]   --> src/parsers/lib.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 | trait Solver {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solver` is never used
[INFO] [stdout]   --> src/parsers/lib.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 | trait Solver {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 17.60s
[INFO] running `Command { std: "docker" "inspect" "6372d2d2d7e3cf7707da8086ebcf5ad3b3d050e8e63b4267ec18aaa328ec1f7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6372d2d2d7e3cf7707da8086ebcf5ad3b3d050e8e63b4267ec18aaa328ec1f7f", kill_on_drop: false }`
[INFO] [stdout] 6372d2d2d7e3cf7707da8086ebcf5ad3b3d050e8e63b4267ec18aaa328ec1f7f