[INFO] cloning repository https://github.com/alexander-koch/loopc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexander-koch/loopc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexander-koch%2Floopc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexander-koch%2Floopc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c762687509415f7553d6c05a037d401a0a874e19
[INFO] checking alexander-koch/loopc against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexander-koch%2Floopc" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexander-koch/loopc 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/alexander-koch/loopc
[INFO] finished tweaking git repo https://github.com/alexander-koch/loopc
[INFO] tweaked toml for git repo https://github.com/alexander-koch/loopc written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/alexander-koch/loopc 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 crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded env_logger v0.5.3
[INFO] [stderr]   Downloaded gcc v0.3.54
[INFO] [stderr]   Downloaded atty v0.2.6
[INFO] [stderr]   Downloaded regex v0.2.5
[INFO] [stderr]   Downloaded ansi_term v0.10.2
[INFO] [stderr]   Downloaded textwrap v0.9.0
[INFO] [stderr]   Downloaded chrono v0.4.0
[INFO] [stderr]   Downloaded wincolor v0.1.4
[INFO] [stderr]   Downloaded clap v2.29.4
[INFO] [stderr]   Downloaded num-traits v0.1.42
[INFO] [stderr]   Downloaded llvm-sys v50.0.3
[INFO] [stderr]   Downloaded num v0.1.41
[INFO] [stderr]   Downloaded termcolor v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7fb383cbebb2492d4860131272655abadf154479fe16b547b9cedff35ff36730
[INFO] running `Command { std: "docker" "start" "-a" "7fb383cbebb2492d4860131272655abadf154479fe16b547b9cedff35ff36730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fb383cbebb2492d4860131272655abadf154479fe16b547b9cedff35ff36730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fb383cbebb2492d4860131272655abadf154479fe16b547b9cedff35ff36730", kill_on_drop: false }`
[INFO] [stdout] 7fb383cbebb2492d4860131272655abadf154479fe16b547b9cedff35ff36730
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 75c96c78b4606132cdeda0f30dd5da75b4a4af590aa1e7e8f91c53b426051d88
[INFO] running `Command { std: "docker" "start" "-a" "75c96c78b4606132cdeda0f30dd5da75b4a4af590aa1e7e8f91c53b426051d88", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]     Checking num-traits v0.1.42
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]    Compiling semver v0.6.0
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking termcolor v0.3.3
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]     Checking clap v2.29.4
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]     Checking regex v0.2.5
[INFO] [stderr]     Checking env_logger v0.5.3
[INFO] [stderr]    Compiling llvm-sys v50.0.3
[INFO] [stderr]     Checking loopc v0.4.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Codegen` is imported redundantly
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use codegen::Codegen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 39 | use codegen::*;
[INFO] [stdout]    |     ---------- the item `Codegen` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Codegen` is imported redundantly
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use codegen::Codegen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 39 | use codegen::*;
[INFO] [stdout]    |     ---------- the item `Codegen` is already imported here
[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 8.88s
[INFO] running `Command { std: "docker" "inspect" "75c96c78b4606132cdeda0f30dd5da75b4a4af590aa1e7e8f91c53b426051d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75c96c78b4606132cdeda0f30dd5da75b4a4af590aa1e7e8f91c53b426051d88", kill_on_drop: false }`
[INFO] [stdout] 75c96c78b4606132cdeda0f30dd5da75b4a4af590aa1e7e8f91c53b426051d88
[INFO] checking alexander-koch/loopc against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexander-koch%2Floopc" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexander-koch/loopc 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/alexander-koch/loopc
[INFO] finished tweaking git repo https://github.com/alexander-koch/loopc
[INFO] tweaked toml for git repo https://github.com/alexander-koch/loopc written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/alexander-koch/loopc 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 32f7dd5c059c8006058776538a052b1b001fd9281ae45703d607c0c45a9a84e7
[INFO] running `Command { std: "docker" "start" "-a" "32f7dd5c059c8006058776538a052b1b001fd9281ae45703d607c0c45a9a84e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32f7dd5c059c8006058776538a052b1b001fd9281ae45703d607c0c45a9a84e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32f7dd5c059c8006058776538a052b1b001fd9281ae45703d607c0c45a9a84e7", kill_on_drop: false }`
[INFO] [stdout] 32f7dd5c059c8006058776538a052b1b001fd9281ae45703d607c0c45a9a84e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b154bfc6b1e9647d7a2b6c8b945c04a03494a56c2719ce955bd967c55db08271
[INFO] running `Command { std: "docker" "start" "-a" "b154bfc6b1e9647d7a2b6c8b945c04a03494a56c2719ce955bd967c55db08271", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]     Checking num-traits v0.1.42
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]    Compiling semver v0.6.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking termcolor v0.3.3
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking clap v2.29.4
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]     Checking regex v0.2.5
[INFO] [stderr]     Checking env_logger v0.5.3
[INFO] [stderr]    Compiling llvm-sys v50.0.3
[INFO] [stderr]     Checking loopc v0.4.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Codegen` is imported redundantly
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use codegen::Codegen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 39 | use codegen::*;
[INFO] [stdout]    |     ---------- the item `Codegen` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Codegen` is imported redundantly
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use codegen::Codegen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 39 | use codegen::*;
[INFO] [stdout]    |     ---------- the item `Codegen` is already imported here
[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 7.62s
[INFO] running `Command { std: "docker" "inspect" "b154bfc6b1e9647d7a2b6c8b945c04a03494a56c2719ce955bd967c55db08271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b154bfc6b1e9647d7a2b6c8b945c04a03494a56c2719ce955bd967c55db08271", kill_on_drop: false }`
[INFO] [stdout] b154bfc6b1e9647d7a2b6c8b945c04a03494a56c2719ce955bd967c55db08271