[INFO] cloning repository https://github.com/aaa59891/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aaa59891/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faaa59891%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faaa59891%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f6d4c81b0abcbc749b2cfb061bba52090dc3865
[INFO] building aaa59891/rust-learning 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%2Faaa59891%2Frust-learning" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aaa59891/rust-learning 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/aaa59891/rust-learning
[INFO] finished tweaking git repo https://github.com/aaa59891/rust-learning
[INFO] tweaked toml for git repo https://github.com/aaa59891/rust-learning written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aaa59891/rust-learning 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b2f2a3833099c1ad1b107f65b8887fec641547e509f0bce0b59b93341b913525
[INFO] running `Command { std: "docker" "start" "-a" "b2f2a3833099c1ad1b107f65b8887fec641547e509f0bce0b59b93341b913525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2f2a3833099c1ad1b107f65b8887fec641547e509f0bce0b59b93341b913525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2f2a3833099c1ad1b107f65b8887fec641547e509f0bce0b59b93341b913525", kill_on_drop: false }`
[INFO] [stdout] b2f2a3833099c1ad1b107f65b8887fec641547e509f0bce0b59b93341b913525
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ed4bdc24f8a506b8528f73ffdfe15a334517c0097614d4e3e8abc45e5481c992
[INFO] running `Command { std: "docker" "start" "-a" "ed4bdc24f8a506b8528f73ffdfe15a334517c0097614d4e3e8abc45e5481c992", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `guess_game` is never used
[INFO] [stdout]  --> src/guess_game/mod.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub(crate) fn guess_game() {
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `different_str` is never used
[INFO] [stdout]  --> src/ownership/mod.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn different_str() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_primitive_type` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn copy_primitive_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_non_primitive_type` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn copy_non_primitive_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clone_example` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn clone_example() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_string_literal` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn test_string_literal() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `Command { std: "docker" "inspect" "ed4bdc24f8a506b8528f73ffdfe15a334517c0097614d4e3e8abc45e5481c992", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed4bdc24f8a506b8528f73ffdfe15a334517c0097614d4e3e8abc45e5481c992", kill_on_drop: false }`
[INFO] [stdout] ed4bdc24f8a506b8528f73ffdfe15a334517c0097614d4e3e8abc45e5481c992
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] bcc843ba321d4edaea717967ec5d363df1575f3adc9f05e3ada03a736bebb077
[INFO] running `Command { std: "docker" "start" "-a" "bcc843ba321d4edaea717967ec5d363df1575f3adc9f05e3ada03a736bebb077", kill_on_drop: false }`
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `guess_game` is never used
[INFO] [stdout]  --> src/guess_game/mod.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub(crate) fn guess_game() {
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `different_str` is never used
[INFO] [stdout]  --> src/ownership/mod.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn different_str() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_primitive_type` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn copy_primitive_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_non_primitive_type` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn copy_non_primitive_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clone_example` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn clone_example() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_string_literal` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn test_string_literal() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "bcc843ba321d4edaea717967ec5d363df1575f3adc9f05e3ada03a736bebb077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcc843ba321d4edaea717967ec5d363df1575f3adc9f05e3ada03a736bebb077", kill_on_drop: false }`
[INFO] [stdout] bcc843ba321d4edaea717967ec5d363df1575f3adc9f05e3ada03a736bebb077