[INFO] cloning repository https://github.com/ekil1100/miniredis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ekil1100/miniredis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekil1100%2Fminiredis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekil1100%2Fminiredis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26bab4d1bc9e7f394149a0d43100c4c433970240
[INFO] checking ekil1100/miniredis against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekil1100%2Fminiredis" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ekil1100/miniredis 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/ekil1100/miniredis
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/ekil1100/miniredis
[INFO] tweaked toml for git repo https://github.com/ekil1100/miniredis written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ekil1100/miniredis 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 mini-redis v0.4.1
[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] 82f9acf0326543f53db8357537a90ae3b6a129e04dfa5e4f6eefd7d15de5fc2c
[INFO] running `Command { std: "docker" "start" "-a" "82f9acf0326543f53db8357537a90ae3b6a129e04dfa5e4f6eefd7d15de5fc2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82f9acf0326543f53db8357537a90ae3b6a129e04dfa5e4f6eefd7d15de5fc2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82f9acf0326543f53db8357537a90ae3b6a129e04dfa5e4f6eefd7d15de5fc2c", kill_on_drop: false }`
[INFO] [stdout] 82f9acf0326543f53db8357537a90ae3b6a129e04dfa5e4f6eefd7d15de5fc2c
[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] 1c72e19a203757154597055f2ec381bc40b2a00b4231dca791edc5045d973ad2
[INFO] running `Command { std: "docker" "start" "-a" "1c72e19a203757154597055f2ec381bc40b2a00b4231dca791edc5045d973ad2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling syn v2.0.49
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-log v0.1.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking chrono v0.4.34
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.4
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]     Checking async-stream v0.3.5
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking pin-project v1.1.4
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking miniredis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `connection`
[INFO] [stdout]   --> src/main.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_connection`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[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: unused variable: `connection`
[INFO] [stdout]   --> src/main.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_connection`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.83s
[INFO] running `Command { std: "docker" "inspect" "1c72e19a203757154597055f2ec381bc40b2a00b4231dca791edc5045d973ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c72e19a203757154597055f2ec381bc40b2a00b4231dca791edc5045d973ad2", kill_on_drop: false }`
[INFO] [stdout] 1c72e19a203757154597055f2ec381bc40b2a00b4231dca791edc5045d973ad2
[INFO] checking ekil1100/miniredis against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekil1100%2Fminiredis" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ekil1100/miniredis 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/ekil1100/miniredis
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/ekil1100/miniredis
[INFO] tweaked toml for git repo https://github.com/ekil1100/miniredis written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ekil1100/miniredis 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] [stderr]     Blocking waiting for file lock on package cache
[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] 73a417df38538ba6c1e4841f5162c22cbab13d02bcf59ffab2e4eb634a6fceaa
[INFO] running `Command { std: "docker" "start" "-a" "73a417df38538ba6c1e4841f5162c22cbab13d02bcf59ffab2e4eb634a6fceaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73a417df38538ba6c1e4841f5162c22cbab13d02bcf59ffab2e4eb634a6fceaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73a417df38538ba6c1e4841f5162c22cbab13d02bcf59ffab2e4eb634a6fceaa", kill_on_drop: false }`
[INFO] [stdout] 73a417df38538ba6c1e4841f5162c22cbab13d02bcf59ffab2e4eb634a6fceaa
[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] ee3add58653257ccddd2a94307df6c3d84c833cd55419eef30c6d0f5c8ba314f
[INFO] running `Command { std: "docker" "start" "-a" "ee3add58653257ccddd2a94307df6c3d84c833cd55419eef30c6d0f5c8ba314f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling syn v2.0.49
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking tracing-log v0.1.4
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking chrono v0.4.34
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.4
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking async-stream v0.3.5
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking pin-project v1.1.4
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking miniredis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `connection`
[INFO] [stdout]   --> src/main.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_connection`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `connection`
[INFO] [stdout]   --> src/main.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_connection`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut connection = Connection::new(socket);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.05s
[INFO] running `Command { std: "docker" "inspect" "ee3add58653257ccddd2a94307df6c3d84c833cd55419eef30c6d0f5c8ba314f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee3add58653257ccddd2a94307df6c3d84c833cd55419eef30c6d0f5c8ba314f", kill_on_drop: false }`
[INFO] [stdout] ee3add58653257ccddd2a94307df6c3d84c833cd55419eef30c6d0f5c8ba314f