[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] testing modulitos/programming-rust-book against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Fprogramming-rust-book" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/modulitos/programming-rust-book on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "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-11/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" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", 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] 6d807b8ac1b55a7bb80196778f6a1d385f29a5c83f5f1ed93b28418436c299f4
[INFO] running `Command { std: "docker" "start" "-a" "6d807b8ac1b55a7bb80196778f6a1d385f29a5c83f5f1ed93b28418436c299f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d807b8ac1b55a7bb80196778f6a1d385f29a5c83f5f1ed93b28418436c299f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d807b8ac1b55a7bb80196778f6a1d385f29a5c83f5f1ed93b28418436c299f4", kill_on_drop: false }`
[INFO] [stdout] 6d807b8ac1b55a7bb80196778f6a1d385f29a5c83f5f1ed93b28418436c299f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68749635f95e72716657c58b5e8658dde9dcc7858f874eeec8ef2a8d9e46880a
[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" "68749635f95e72716657c58b5e8658dde9dcc7858f874eeec8ef2a8d9e46880a", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "68749635f95e72716657c58b5e8658dde9dcc7858f874eeec8ef2a8d9e46880a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68749635f95e72716657c58b5e8658dde9dcc7858f874eeec8ef2a8d9e46880a", kill_on_drop: false }`
[INFO] [stdout] 68749635f95e72716657c58b5e8658dde9dcc7858f874eeec8ef2a8d9e46880a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bab594b4b1234da16847017402376d8671c273dfe751be545df74dbdc688994a
[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" "bab594b4b1234da16847017402376d8671c273dfe751be545df74dbdc688994a", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "bab594b4b1234da16847017402376d8671c273dfe751be545df74dbdc688994a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bab594b4b1234da16847017402376d8671c273dfe751be545df74dbdc688994a", kill_on_drop: false }`
[INFO] [stdout] bab594b4b1234da16847017402376d8671c273dfe751be545df74dbdc688994a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c301a1ec48edf955f83aed926274db4ab28d0be4dc74f9aae1b48d868ac67518
[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" "c301a1ec48edf955f83aed926274db4ab28d0be4dc74f9aae1b48d868ac67518", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `words`
[INFO] [stderr]   --> src/ch_11.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let words: Vec<String> = line
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ch_11.rs:11:22
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn splice(&self, other: &Self) -> Self {
[INFO] [stderr]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ch_11.rs:20:22
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn splice(&self, other: &Self) -> Self {
[INFO] [stderr]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ch_11.rs:37:22
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn splice(&self, other: &dyn MegaSpliceable) -> Box<dyn MegaSpliceable> {
[INFO] [stderr]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ch_11.rs:44:22
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn splice(&self, other: &dyn MegaSpliceable) -> Box<dyn MegaSpliceable> {
[INFO] [stderr]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_fqmc`
[INFO] [stderr]   --> src/ch_11.rs:51:4
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn test_fqmc() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dump`
[INFO] [stderr]   --> src/ch_11.rs:74:4
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn dump<I>(iter: I)
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/programming_rust_book-600335af696e7605
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c301a1ec48edf955f83aed926274db4ab28d0be4dc74f9aae1b48d868ac67518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c301a1ec48edf955f83aed926274db4ab28d0be4dc74f9aae1b48d868ac67518", kill_on_drop: false }`
[INFO] [stdout] c301a1ec48edf955f83aed926274db4ab28d0be4dc74f9aae1b48d868ac67518