[INFO] cloning repository https://github.com/chengr4/pages-read-write-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chengr4/pages-read-write-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengr4%2Fpages-read-write-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengr4%2Fpages-read-write-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8cbc52a5a04691d2b07c6da4ea8b6d520df05db
[INFO] checking chengr4/pages-read-write-rs against try#7b3da9103634dffd4f4365cfd8642427c781d99f+rustflags=-Dinherent-method-on-receiver for 152214-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengr4%2Fpages-read-write-rs" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chengr4/pages-read-write-rs
[INFO] finished tweaking git repo https://github.com/chengr4/pages-read-write-rs
[INFO] tweaked toml for git repo https://github.com/chengr4/pages-read-write-rs written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chengr4/pages-read-write-rs on toolchain 7b3da9103634dffd4f4365cfd8642427c781d99f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7b3da9103634dffd4f4365cfd8642427c781d99f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chengr4/pages-read-write-rs 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" "+7b3da9103634dffd4f4365cfd8642427c781d99f" "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-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+7b3da9103634dffd4f4365cfd8642427c781d99f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0266659a3d58a88861c18be4df06fc03944ab44a3531812333c845a6a56ec57e
[INFO] running `Command { std: "docker" "start" "-a" "0266659a3d58a88861c18be4df06fc03944ab44a3531812333c845a6a56ec57e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0266659a3d58a88861c18be4df06fc03944ab44a3531812333c845a6a56ec57e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0266659a3d58a88861c18be4df06fc03944ab44a3531812333c845a6a56ec57e", kill_on_drop: false }`
[INFO] [stdout] 0266659a3d58a88861c18be4df06fc03944ab44a3531812333c845a6a56ec57e
[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 -Dinherent-method-on-receiver" "-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+7b3da9103634dffd4f4365cfd8642427c781d99f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c68e24be3bd0961f949323fd2a52d6755ec908d247a38670f2dd7e1d214c65a4
[INFO] running `Command { std: "docker" "start" "-a" "c68e24be3bd0961f949323fd2a52d6755ec908d247a38670f2dd7e1d214c65a4", kill_on_drop: false }`
[INFO] [stderr]     Checking pages-read-write-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/record.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn serialize(&self) -> Vec<u8> {
[INFO] [stdout]    |        ---------           ^^^^^^^ expected `Vec<u8>`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Vec<u8>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] help: consider returning the local binding `buffer`
[INFO] [stdout]    |
[INFO] [stdout] 35 ~         let mut buffer = Vec::new();
[INFO] [stdout] 36 +         buffer
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/record.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn serialize(&self) -> Vec<u8> {
[INFO] [stdout]    |        ---------           ^^^^^^^ expected `Vec<u8>`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Vec<u8>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] help: consider returning the local binding `buffer`
[INFO] [stdout]    |
[INFO] [stdout] 35 ~         let mut buffer = Vec::new();
[INFO] [stdout] 36 +         buffer
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pages-read-write-rs` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `pages-read-write-rs` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c68e24be3bd0961f949323fd2a52d6755ec908d247a38670f2dd7e1d214c65a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c68e24be3bd0961f949323fd2a52d6755ec908d247a38670f2dd7e1d214c65a4", kill_on_drop: false }`
[INFO] [stdout] c68e24be3bd0961f949323fd2a52d6755ec908d247a38670f2dd7e1d214c65a4