[INFO] cloning repository https://github.com/modulitos/programming-rust-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/modulitos/programming-rust-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Fprogramming-rust-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Fprogramming-rust-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1df18938c89c4f63579528fb8fddba6a20ae2082
[INFO] checking modulitos/programming-rust-book against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Fprogramming-rust-book" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/modulitos/programming-rust-book on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/modulitos/programming-rust-book
[INFO] finished tweaking git repo https://github.com/modulitos/programming-rust-book
[INFO] tweaked toml for git repo https://github.com/modulitos/programming-rust-book written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/modulitos/programming-rust-book already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fff4f5a7d2217e6d16e614e094a939e8050d2fa47eecdab18ae7aee798fe754c
[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" "fff4f5a7d2217e6d16e614e094a939e8050d2fa47eecdab18ae7aee798fe754c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fff4f5a7d2217e6d16e614e094a939e8050d2fa47eecdab18ae7aee798fe754c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fff4f5a7d2217e6d16e614e094a939e8050d2fa47eecdab18ae7aee798fe754c", kill_on_drop: false }`
[INFO] [stdout] fff4f5a7d2217e6d16e614e094a939e8050d2fa47eecdab18ae7aee798fe754c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] e9a0bccb830b306716f3608ffbf5b2aa64ba5645f8275863aaa898f7b4ff404b
[INFO] running `Command { std: "docker" "start" "-a" "e9a0bccb830b306716f3608ffbf5b2aa64ba5645f8275863aaa898f7b4ff404b", kill_on_drop: false }`
[INFO] [stderr]     Checking programming_rust_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]   --> src/ch_11.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let words: Vec<String> = line
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn splice(&self, other: &Self) -> Self {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn splice(&self, other: &Self) -> Self {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:37:22
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn splice(&self, other: &dyn MegaSpliceable) -> Box<dyn MegaSpliceable> {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:44:22
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn splice(&self, other: &dyn MegaSpliceable) -> Box<dyn MegaSpliceable> {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_fqmc`
[INFO] [stdout]   --> src/ch_11.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn test_fqmc() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dump`
[INFO] [stdout]   --> src/ch_11.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn dump<I>(iter: I)
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]   --> src/ch_11.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let words: Vec<String> = line
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn splice(&self, other: &Self) -> Self {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn splice(&self, other: &Self) -> Self {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:37:22
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn splice(&self, other: &dyn MegaSpliceable) -> Box<dyn MegaSpliceable> {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ch_11.rs:44:22
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn splice(&self, other: &dyn MegaSpliceable) -> Box<dyn MegaSpliceable> {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_fqmc`
[INFO] [stdout]   --> src/ch_11.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn test_fqmc() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dump`
[INFO] [stdout]   --> src/ch_11.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn dump<I>(iter: I)
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "e9a0bccb830b306716f3608ffbf5b2aa64ba5645f8275863aaa898f7b4ff404b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9a0bccb830b306716f3608ffbf5b2aa64ba5645f8275863aaa898f7b4ff404b", kill_on_drop: false }`
[INFO] [stdout] e9a0bccb830b306716f3608ffbf5b2aa64ba5645f8275863aaa898f7b4ff404b