[INFO] cloning repository https://github.com/eklein09/ctci_rust_lesson1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eklein09/ctci_rust_lesson1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feklein09%2Fctci_rust_lesson1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feklein09%2Fctci_rust_lesson1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 25b85aa2949e43c42ca0f2c3d9ffd01ebb3e25c4
[INFO] building eklein09/ctci_rust_lesson1 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feklein09%2Fctci_rust_lesson1" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eklein09/ctci_rust_lesson1 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eklein09/ctci_rust_lesson1
[INFO] finished tweaking git repo https://github.com/eklein09/ctci_rust_lesson1
[INFO] tweaked toml for git repo https://github.com/eklein09/ctci_rust_lesson1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/eklein09/ctci_rust_lesson1 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded counter v0.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5982e425109cc2833b8bc65558c1668f7adb2c1e4aaab7dd81c47e63c218bae2
[INFO] running `Command { std: "docker" "start" "-a" "5982e425109cc2833b8bc65558c1668f7adb2c1e4aaab7dd81c47e63c218bae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5982e425109cc2833b8bc65558c1668f7adb2c1e4aaab7dd81c47e63c218bae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5982e425109cc2833b8bc65558c1668f7adb2c1e4aaab7dd81c47e63c218bae2", kill_on_drop: false }`
[INFO] [stdout] 5982e425109cc2833b8bc65558c1668f7adb2c1e4aaab7dd81c47e63c218bae2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89797b2dcc80dd0ed9810dc9d69072e1d47f65843a9a1d4b0563dc4e52598388
[INFO] running `Command { std: "docker" "start" "-a" "89797b2dcc80dd0ed9810dc9d69072e1d47f65843a9a1d4b0563dc4e52598388", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling counter v0.5.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling lesson1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `is_unique` is never used
[INFO] [stdout]   --> src/main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_unique(s: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_anagram` is never used
[INFO] [stdout]   --> src/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn is_anagram(a: &str, b: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_compression` is never used
[INFO] [stdout]  --> src/compression.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn string_compression(s: &str) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `urlify` is never used
[INFO] [stdout]  --> src/urlify.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn urlify(a: &str) -> String {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `common_prefix` is never used
[INFO] [stdout]  --> src/common_prefix.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn common_prefix(a: String, b: String) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_common_prefix` is never used
[INFO] [stdout]   --> src/common_prefix.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.75s
[INFO] running `Command { std: "docker" "inspect" "89797b2dcc80dd0ed9810dc9d69072e1d47f65843a9a1d4b0563dc4e52598388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89797b2dcc80dd0ed9810dc9d69072e1d47f65843a9a1d4b0563dc4e52598388", kill_on_drop: false }`
[INFO] [stdout] 89797b2dcc80dd0ed9810dc9d69072e1d47f65843a9a1d4b0563dc4e52598388
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5f973263a4b4b46a3bcee24644f83c3e7b94e55fc05a922e8aa27acf0ef687a
[INFO] running `Command { std: "docker" "start" "-a" "d5f973263a4b4b46a3bcee24644f83c3e7b94e55fc05a922e8aa27acf0ef687a", kill_on_drop: false }`
[INFO] [stderr]    Compiling lesson1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "d5f973263a4b4b46a3bcee24644f83c3e7b94e55fc05a922e8aa27acf0ef687a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5f973263a4b4b46a3bcee24644f83c3e7b94e55fc05a922e8aa27acf0ef687a", kill_on_drop: false }`
[INFO] [stdout] d5f973263a4b4b46a3bcee24644f83c3e7b94e55fc05a922e8aa27acf0ef687a