[INFO] cloning repository https://github.com/mexus/netconsole-receiver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mexus/netconsole-receiver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmexus%2Fnetconsole-receiver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmexus%2Fnetconsole-receiver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f7d39f51f25c7b0da5b3e3ccc04d62ea2cd2354
[INFO] checking mexus/netconsole-receiver against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmexus%2Fnetconsole-receiver" "/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/mexus/netconsole-receiver 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/mexus/netconsole-receiver
[INFO] finished tweaking git repo https://github.com/mexus/netconsole-receiver
[INFO] tweaked toml for git repo https://github.com/mexus/netconsole-receiver written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mexus/netconsole-receiver 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded color-eyre v0.6.1
[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] 9dd9d81bf877d313d971e45d87c461a588c4cf0822bbe3d833627365d88af63f
[INFO] running `Command { std: "docker" "start" "-a" "9dd9d81bf877d313d971e45d87c461a588c4cf0822bbe3d833627365d88af63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9dd9d81bf877d313d971e45d87c461a588c4cf0822bbe3d833627365d88af63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dd9d81bf877d313d971e45d87c461a588c4cf0822bbe3d833627365d88af63f", kill_on_drop: false }`
[INFO] [stdout] 9dd9d81bf877d313d971e45d87c461a588c4cf0822bbe3d833627365d88af63f
[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] 3d627a35b9e6be81c07b2d2da9cf169e63a0a87719ac13973b6548aab3ab87ef
[INFO] running `Command { std: "docker" "start" "-a" "3d627a35b9e6be81c07b2d2da9cf169e63a0a87719ac13973b6548aab3ab87ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.94
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking tracing-core v0.1.26
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking owo-colors v3.4.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tracing-attributes v0.1.21
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tokio v1.18.2
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]     Checking tracing-subscriber v0.3.11
[INFO] [stderr]     Checking tracing-error v0.2.0
[INFO] [stderr]     Checking color-spantrace v0.2.0
[INFO] [stderr]     Checking color-eyre v0.6.1
[INFO] [stderr]     Checking netconsole-receiver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fragments.rs:60:21
[INFO] [stdout]    |
[INFO] [stdout] 60 |                 let mut previous = &mut self.filled[position - 1];
[INFO] [stdout]    |                     ----^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fragments.rs:60:21
[INFO] [stdout]    |
[INFO] [stdout] 60 |                 let mut previous = &mut self.filled[position - 1];
[INFO] [stdout]    |                     ----^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 21.01s
[INFO] running `Command { std: "docker" "inspect" "3d627a35b9e6be81c07b2d2da9cf169e63a0a87719ac13973b6548aab3ab87ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d627a35b9e6be81c07b2d2da9cf169e63a0a87719ac13973b6548aab3ab87ef", kill_on_drop: false }`
[INFO] [stdout] 3d627a35b9e6be81c07b2d2da9cf169e63a0a87719ac13973b6548aab3ab87ef
[INFO] checking mexus/netconsole-receiver against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmexus%2Fnetconsole-receiver" "/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/mexus/netconsole-receiver 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/mexus/netconsole-receiver
[INFO] finished tweaking git repo https://github.com/mexus/netconsole-receiver
[INFO] tweaked toml for git repo https://github.com/mexus/netconsole-receiver written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mexus/netconsole-receiver 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] 61d3317470e3e326f2ccf329c3884080215a27ef6f04adf2b7cba69f16a6cd1a
[INFO] running `Command { std: "docker" "start" "-a" "61d3317470e3e326f2ccf329c3884080215a27ef6f04adf2b7cba69f16a6cd1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61d3317470e3e326f2ccf329c3884080215a27ef6f04adf2b7cba69f16a6cd1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61d3317470e3e326f2ccf329c3884080215a27ef6f04adf2b7cba69f16a6cd1a", kill_on_drop: false }`
[INFO] [stdout] 61d3317470e3e326f2ccf329c3884080215a27ef6f04adf2b7cba69f16a6cd1a
[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] 8805228eadfc87b11e3e92ca77e88ff716cb5d002321ccf8a5cd674a360a59af
[INFO] running `Command { std: "docker" "start" "-a" "8805228eadfc87b11e3e92ca77e88ff716cb5d002321ccf8a5cd674a360a59af", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.94
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking tracing-core v0.1.26
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking owo-colors v3.4.0
[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.3
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tracing-attributes v0.1.21
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tokio v1.18.2
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]     Checking tracing-subscriber v0.3.11
[INFO] [stderr]     Checking tracing-error v0.2.0
[INFO] [stderr]     Checking color-spantrace v0.2.0
[INFO] [stderr]     Checking color-eyre v0.6.1
[INFO] [stderr]     Checking netconsole-receiver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fragments.rs:60:21
[INFO] [stdout]    |
[INFO] [stdout] 60 |                 let mut previous = &mut self.filled[position - 1];
[INFO] [stdout]    |                     ----^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fragments.rs:60:21
[INFO] [stdout]    |
[INFO] [stdout] 60 |                 let mut previous = &mut self.filled[position - 1];
[INFO] [stdout]    |                     ----^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 18.21s
[INFO] running `Command { std: "docker" "inspect" "8805228eadfc87b11e3e92ca77e88ff716cb5d002321ccf8a5cd674a360a59af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8805228eadfc87b11e3e92ca77e88ff716cb5d002321ccf8a5cd674a360a59af", kill_on_drop: false }`
[INFO] [stdout] 8805228eadfc87b11e3e92ca77e88ff716cb5d002321ccf8a5cd674a360a59af