[INFO] cloning repository https://github.com/quat1024/quatweb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quat1024/quatweb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquat1024%2Fquatweb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquat1024%2Fquatweb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b949a87d6934da9d3bfe9c51dad990a55e6b335
[INFO] testing quat1024/quatweb against 1.52.1 for beta-1.53-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquat1024%2Fquatweb" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quat1024/quatweb on toolchain 1.52.1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.52.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quat1024/quatweb
[INFO] finished tweaking git repo https://github.com/quat1024/quatweb
[INFO] tweaked toml for git repo https://github.com/quat1024/quatweb written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/quat1024/quatweb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.52.1" "fetch" "--locked" "--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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62b711f4c9ff13b4f3b2842d679979b0ae92fc4f797904d253cc6dbece39cdff
[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" "62b711f4c9ff13b4f3b2842d679979b0ae92fc4f797904d253cc6dbece39cdff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62b711f4c9ff13b4f3b2842d679979b0ae92fc4f797904d253cc6dbece39cdff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62b711f4c9ff13b4f3b2842d679979b0ae92fc4f797904d253cc6dbece39cdff", kill_on_drop: false }`
[INFO] [stdout] 62b711f4c9ff13b4f3b2842d679979b0ae92fc4f797904d253cc6dbece39cdff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bad4ccf96ad79e4ca13427bbb83cddb3bef5dc2dccfecc5f4d7bdf28bfc5f91
[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" "6bad4ccf96ad79e4ca13427bbb83cddb3bef5dc2dccfecc5f4d7bdf28bfc5f91", 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] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling syn v1.0.62
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling futures-io v0.3.13
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling tokio v1.2.0
[INFO] [stderr]    Compiling futures-util v0.3.13
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling headers-core v0.2.0
[INFO] [stderr]    Compiling tracing v0.1.25
[INFO] [stderr]    Compiling twoway v0.1.8
[INFO] [stderr]    Compiling buf_redux v0.8.4
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling sha-1 v0.9.4
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling mio v0.7.9
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling headers v0.3.4
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling const-random v0.1.13
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling futures v0.3.13
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling webpki v0.21.4
[INFO] [stderr]    Compiling tungstenite v0.12.0
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling rustls v0.19.0
[INFO] [stderr]    Compiling multipart v0.17.1
[INFO] [stderr]    Compiling darling_core v0.12.2
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling pin-project-internal v1.0.5
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling ramhorns-derive v0.10.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling darling_macro v0.12.2
[INFO] [stderr]    Compiling darling v0.12.2
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling serde_with_macros v1.4.1
[INFO] [stderr]    Compiling pin-project v1.0.5
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling logos v0.11.4
[INFO] [stderr]    Compiling ramhorns v0.10.2
[INFO] [stderr]    Compiling tokio-util v0.6.3
[INFO] [stderr]    Compiling tokio-tungstenite v0.13.0
[INFO] [stderr]    Compiling tokio-stream v0.1.3
[INFO] [stderr]    Compiling tokio-rustls v0.22.0
[INFO] [stderr]    Compiling h2 v0.3.1
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling envy v0.4.2
[INFO] [stderr]    Compiling serde_with v1.6.4
[INFO] [stderr]    Compiling hyper v0.14.4
[INFO] [stderr]    Compiling warp v0.3.0
[INFO] [stderr]    Compiling quatweb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'peekable_peek_mut'
[INFO] [stdout]    --> src/post.rs:147:32
[INFO] [stdout]     |
[INFO] [stdout] 147 |             if let Some((b_idx, b)) = i.peek_mut() {
[INFO] [stdout]     |                                         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #78302 <https://github.com/rust-lang/rust/issues/78302> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quatweb`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6bad4ccf96ad79e4ca13427bbb83cddb3bef5dc2dccfecc5f4d7bdf28bfc5f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bad4ccf96ad79e4ca13427bbb83cddb3bef5dc2dccfecc5f4d7bdf28bfc5f91", kill_on_drop: false }`
[INFO] [stdout] 6bad4ccf96ad79e4ca13427bbb83cddb3bef5dc2dccfecc5f4d7bdf28bfc5f91