[INFO] cloning repository https://github.com/mpatron/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpatron/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpatron%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpatron%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d52ce2d354c48167a40d35aeef4a1e2d2338d6b9
[INFO] checking mpatron/rustlings against master#8a65ee08296b36342bf7c3cdc15312ccbc357227 for pr-142704
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpatron%2Frustlings" "/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/mpatron/rustlings on toolchain 8a65ee08296b36342bf7c3cdc15312ccbc357227
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mpatron/rustlings
[INFO] finished tweaking git repo https://github.com/mpatron/rustlings
[INFO] tweaked toml for git repo https://github.com/mpatron/rustlings written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mpatron/rustlings 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" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "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-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e52f05a52932e2acf48be11702d546137ec58235cfa3a4a4470b485a0fa73fe
[INFO] running `Command { std: "docker" "start" "-a" "4e52f05a52932e2acf48be11702d546137ec58235cfa3a4a4470b485a0fa73fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e52f05a52932e2acf48be11702d546137ec58235cfa3a4a4470b485a0fa73fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e52f05a52932e2acf48be11702d546137ec58235cfa3a4a4470b485a0fa73fe", kill_on_drop: false }`
[INFO] [stdout] 4e52f05a52932e2acf48be11702d546137ec58235cfa3a4a4470b485a0fa73fe
[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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99909cd396d2ce011e65d19d34a464b66ca36442de7216f1a3d49694255b92c5
[INFO] running `Command { std: "docker" "start" "-a" "99909cd396d2ce011e65d19d34a464b66ca36442de7216f1a3d49694255b92c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking anstyle v1.0.2
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking anstyle-parse v0.2.1
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]    Compiling portable-atomic v1.4.3
[INFO] [stderr]     Checking aho-corasick v1.0.5
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking indexmap v2.0.0
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.105
[INFO] [stderr]    Compiling syn v2.0.31
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking winnow v0.5.15
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking clap_builder v4.4.2
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking filetime v0.2.22
[INFO] [stderr]     Checking console v0.15.7
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]     Checking indicatif v0.17.6
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking home v0.5.5
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking bstr v1.6.2
[INFO] [stderr]     Checking predicates v3.0.3
[INFO] [stderr]     Checking assert_cmd v2.0.12
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]     Checking clap v4.4.2
[INFO] [stderr]     Checking toml_datetime v0.6.3
[INFO] [stderr]     Checking serde_spanned v0.6.3
[INFO] [stderr]     Checking toml_edit v0.19.14
[INFO] [stderr]     Checking toml v0.7.6
[INFO] [stderr]     Checking rustlings v5.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/exercise.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
[INFO] [stdout]     |                    ^^^^^            ---------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn compile(&self) -> Result<CompiledExercise<'_>, ExerciseOutput> {
[INFO] [stdout]     |                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/exercise.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
[INFO] [stdout]     |                    ^^^^^            ---------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn compile(&self) -> Result<CompiledExercise<'_>, ExerciseOutput> {
[INFO] [stdout]     |                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 35.87s
[INFO] running `Command { std: "docker" "inspect" "99909cd396d2ce011e65d19d34a464b66ca36442de7216f1a3d49694255b92c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99909cd396d2ce011e65d19d34a464b66ca36442de7216f1a3d49694255b92c5", kill_on_drop: false }`
[INFO] [stdout] 99909cd396d2ce011e65d19d34a464b66ca36442de7216f1a3d49694255b92c5
