[INFO] cloning repository https://github.com/JonathanLorimer/learn-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JonathanLorimer/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanLorimer%2Flearn-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanLorimer%2Flearn-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 78830f8917974dee3c481493866fe026bad40804 [INFO] building JonathanLorimer/learn-rust 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%2FJonathanLorimer%2Flearn-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/JonathanLorimer/learn-rust 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/JonathanLorimer/learn-rust [INFO] finished tweaking git repo https://github.com/JonathanLorimer/learn-rust [INFO] tweaked toml for git repo https://github.com/JonathanLorimer/learn-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/JonathanLorimer/learn-rust 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 14546b96ff283e7a05a7451c50f49e97a20304bb904f7cd5ca578a0c1b50abca [INFO] running `Command { std: "docker" "start" "-a" "14546b96ff283e7a05a7451c50f49e97a20304bb904f7cd5ca578a0c1b50abca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "14546b96ff283e7a05a7451c50f49e97a20304bb904f7cd5ca578a0c1b50abca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "14546b96ff283e7a05a7451c50f49e97a20304bb904f7cd5ca578a0c1b50abca", kill_on_drop: false }` [INFO] [stdout] 14546b96ff283e7a05a7451c50f49e97a20304bb904f7cd5ca578a0c1b50abca [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 457afab7933022a7959464aa02777d19a36f05f2ab82e7272ee4afec3b852491 [INFO] running `Command { std: "docker" "start" "-a" "457afab7933022a7959464aa02777d19a36f05f2ab82e7272ee4afec3b852491", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.112 [INFO] [stderr] Compiling ppv-lite86 v0.2.16 [INFO] [stderr] Compiling getrandom v0.2.3 [INFO] [stderr] Compiling rand_core v0.6.3 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.4 [INFO] [stderr] Compiling learn-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `ref_to_nothing` [INFO] [stdout] --> src/ownership.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | let ref_to_nothing = dangle(); [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_nothing` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guessing_game` is never used [INFO] [stdout] --> src/main.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn guessing_game() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hello` is never used [INFO] [stdout] --> src/ownership.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn hello(){ [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `clone` is never used [INFO] [stdout] --> src/ownership.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn clone(){ [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> src/ownership.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 15 | pub fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_ownership` is never used [INFO] [stdout] --> src/ownership.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 32 | pub fn takes_ownership(some_string: String) { // some_string comes into scope [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `makes_copy` is never used [INFO] [stdout] --> src/ownership.rs:37:8 [INFO] [stdout] | [INFO] [stdout] 37 | pub fn makes_copy(some_integer: i32) { // some_integer comes into scope [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangler` is never used [INFO] [stdout] --> src/ownership.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 41 | pub fn dangler() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangle` is never used [INFO] [stdout] --> src/ownership.rs:45:4 [INFO] [stdout] | [INFO] [stdout] 45 | fn dangle() -> String { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.65s [INFO] running `Command { std: "docker" "inspect" "457afab7933022a7959464aa02777d19a36f05f2ab82e7272ee4afec3b852491", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "457afab7933022a7959464aa02777d19a36f05f2ab82e7272ee4afec3b852491", kill_on_drop: false }` [INFO] [stdout] 457afab7933022a7959464aa02777d19a36f05f2ab82e7272ee4afec3b852491 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 9ebaed27c524e55a38e0a4739697a748be6177e6a286cae1ca012bc059d6de06 [INFO] running `Command { std: "docker" "start" "-a" "9ebaed27c524e55a38e0a4739697a748be6177e6a286cae1ca012bc059d6de06", kill_on_drop: false }` [INFO] [stderr] Compiling learn-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `ref_to_nothing` [INFO] [stdout] --> src/ownership.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | let ref_to_nothing = dangle(); [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_nothing` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guessing_game` is never used [INFO] [stdout] --> src/main.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn guessing_game() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hello` is never used [INFO] [stdout] --> src/ownership.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn hello(){ [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `clone` is never used [INFO] [stdout] --> src/ownership.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn clone(){ [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> src/ownership.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 15 | pub fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_ownership` is never used [INFO] [stdout] --> src/ownership.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 32 | pub fn takes_ownership(some_string: String) { // some_string comes into scope [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `makes_copy` is never used [INFO] [stdout] --> src/ownership.rs:37:8 [INFO] [stdout] | [INFO] [stdout] 37 | pub fn makes_copy(some_integer: i32) { // some_integer comes into scope [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangler` is never used [INFO] [stdout] --> src/ownership.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 41 | pub fn dangler() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangle` is never used [INFO] [stdout] --> src/ownership.rs:45:4 [INFO] [stdout] | [INFO] [stdout] 45 | fn dangle() -> String { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s [INFO] running `Command { std: "docker" "inspect" "9ebaed27c524e55a38e0a4739697a748be6177e6a286cae1ca012bc059d6de06", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9ebaed27c524e55a38e0a4739697a748be6177e6a286cae1ca012bc059d6de06", kill_on_drop: false }` [INFO] [stdout] 9ebaed27c524e55a38e0a4739697a748be6177e6a286cae1ca012bc059d6de06