[INFO] cloning repository https://github.com/svgroz/stqueue
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/svgroz/stqueue" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsvgroz%2Fstqueue", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsvgroz%2Fstqueue'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 335e90290095a971669c0e7e56f42ef46bcc3bd3
[INFO] checking svgroz/stqueue against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsvgroz%2Fstqueue" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/svgroz/stqueue on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/svgroz/stqueue
[INFO] finished tweaking git repo https://github.com/svgroz/stqueue
[INFO] tweaked toml for git repo https://github.com/svgroz/stqueue written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/svgroz/stqueue already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d16244b63fa162fb3e9258215d63f0c1af7898d7173c18f9898f576f48dd6b7d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d16244b63fa162fb3e9258215d63f0c1af7898d7173c18f9898f576f48dd6b7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d16244b63fa162fb3e9258215d63f0c1af7898d7173c18f9898f576f48dd6b7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d16244b63fa162fb3e9258215d63f0c1af7898d7173c18f9898f576f48dd6b7d", kill_on_drop: false }`
[INFO] [stdout] d16244b63fa162fb3e9258215d63f0c1af7898d7173c18f9898f576f48dd6b7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e483d023c108a41ff85c1cd811bb01ca54a1ad97c93e8465a2e440ed7b0d1967
[INFO] running `Command { std: "docker" "start" "-a" "e483d023c108a41ff85c1cd811bb01ca54a1ad97c93e8465a2e440ed7b0d1967", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking smallvec v1.6.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]     Checking pin-project-lite v0.2.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking bytes v1.0.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking core v0.1.0 (/opt/rustwide/workdir/core)
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stdout] warning: field is never read: `channel`
[INFO] [stdout]  --> core/src/client/consumer.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     channel: C,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `last_activity`
[INFO] [stdout]  --> core/src/client/consumer.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     last_activity: time::Duration,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stdout] warning: field is never read: `channel`
[INFO] [stdout]  --> core/src/client/consumer.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     channel: C,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `last_activity`
[INFO] [stdout]  --> core/src/client/consumer.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     last_activity: time::Duration,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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]    Compiling tokio v1.0.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.3
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]     Checking pin-project v1.0.3
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking reader v0.1.0 (/opt/rustwide/workdir/reader)
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking main v0.1.0 (/opt/rustwide/workdir/main)
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> main/src/main.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let message = read_message_x(stream).await;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> main/src/main.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let message = read_message_x(stream).await;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> main/src/main.rs:31:36
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Err(err) => panic!(err),
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Err(err) => panic!("{}", err),
[INFO] [stdout]    |                                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Err(err) => std::panic::panic_any(err),
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> main/src/main.rs:31:36
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Err(err) => panic!(err),
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Err(err) => panic!("{}", err),
[INFO] [stdout]    |                                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Err(err) => std::panic::panic_any(err),
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> main/src/main.rs:40:28
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Err(err) => panic!(err),
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Err(err) => panic!("{}", err),
[INFO] [stdout]    |                            ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Err(err) => std::panic::panic_any(err),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> main/src/main.rs:48:32
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Err(err) => panic!(err),
[INFO] [stdout]    |                                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Err(err) => panic!("{}", err),
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Err(err) => std::panic::panic_any(err),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> main/src/main.rs:40:28
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Err(err) => panic!(err),
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Err(err) => panic!("{}", err),
[INFO] [stdout]    |                            ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Err(err) => std::panic::panic_any(err),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> main/src/main.rs:48:32
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Err(err) => panic!(err),
[INFO] [stdout]    |                                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Err(err) => panic!("{}", err),
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Err(err) => std::panic::panic_any(err),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.17s
[INFO] running `Command { std: "docker" "inspect" "e483d023c108a41ff85c1cd811bb01ca54a1ad97c93e8465a2e440ed7b0d1967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e483d023c108a41ff85c1cd811bb01ca54a1ad97c93e8465a2e440ed7b0d1967", kill_on_drop: false }`
[INFO] [stdout] e483d023c108a41ff85c1cd811bb01ca54a1ad97c93e8465a2e440ed7b0d1967