[INFO] cloning repository https://github.com/rust-kotlin/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/rust-kotlin/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-kotlin%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-kotlin%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4e7fa0ee24d9dd820c6c8cf89e266a029a268fa
[INFO] building rust-kotlin/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%2Frust-kotlin%2Frust_learning" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
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[INFO] validating manifest of git repo https://github.com/rust-kotlin/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/rust-kotlin/rust_learning
[INFO] finished tweaking git repo https://github.com/rust-kotlin/rust_learning
[INFO] tweaked toml for git repo https://github.com/rust-kotlin/rust_learning written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-kotlin/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5bb37123a3479023ffc73aeeb2f8cbcd707f1760f9e301c5664f62ce60234954
[INFO] running `Command { std: "docker" "start" "-a" "5bb37123a3479023ffc73aeeb2f8cbcd707f1760f9e301c5664f62ce60234954", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bb37123a3479023ffc73aeeb2f8cbcd707f1760f9e301c5664f62ce60234954", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bb37123a3479023ffc73aeeb2f8cbcd707f1760f9e301c5664f62ce60234954", kill_on_drop: false }`
[INFO] [stdout] 5bb37123a3479023ffc73aeeb2f8cbcd707f1760f9e301c5664f62ce60234954
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 563ad6e73640b99c7e8d34e7043d044d53bc5e4554f9f1886c5e21e52bd48698
[INFO] running `Command { std: "docker" "start" "-a" "563ad6e73640b99c7e8d34e7043d044d53bc5e4554f9f1886c5e21e52bd48698", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust_learning v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `first_sentence`
[INFO] [stdout]  --> src/bin/lifetime.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let first_sentence = novel.split('.').next().expect("Could not fount a '.'");
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_sentence`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/bin/lifetime.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stdout]   --> src/bin/lifetime.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] 15 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.46s
[INFO] running `Command { std: "docker" "inspect" "563ad6e73640b99c7e8d34e7043d044d53bc5e4554f9f1886c5e21e52bd48698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "563ad6e73640b99c7e8d34e7043d044d53bc5e4554f9f1886c5e21e52bd48698", kill_on_drop: false }`
[INFO] [stdout] 563ad6e73640b99c7e8d34e7043d044d53bc5e4554f9f1886c5e21e52bd48698
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 72ea6a4bc3ae778b893ce697c51006d49f3e075ce0aa19f35e612af9ebf3b365
[INFO] running `Command { std: "docker" "start" "-a" "72ea6a4bc3ae778b893ce697c51006d49f3e075ce0aa19f35e612af9ebf3b365", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_learning v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rust_learning`
[INFO] [stdout]  --> tests/integration_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_learning;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_sentence`
[INFO] [stdout]  --> src/bin/lifetime.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let first_sentence = novel.split('.').next().expect("Could not fount a '.'");
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_sentence`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/bin/lifetime.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stdout]   --> src/bin/lifetime.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] 15 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_sentence`
[INFO] [stdout]  --> src/bin/lifetime.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let first_sentence = novel.split('.').next().expect("Could not fount a '.'");
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_sentence`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/bin/lifetime.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stdout]   --> src/bin/lifetime.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] 15 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `Command { std: "docker" "inspect" "72ea6a4bc3ae778b893ce697c51006d49f3e075ce0aa19f35e612af9ebf3b365", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72ea6a4bc3ae778b893ce697c51006d49f3e075ce0aa19f35e612af9ebf3b365", kill_on_drop: false }`
[INFO] [stdout] 72ea6a4bc3ae778b893ce697c51006d49f3e075ce0aa19f35e612af9ebf3b365