[INFO] cloning repository https://github.com/rrumana/rust_lecture
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rrumana/rust_lecture" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frrumana%2Frust_lecture", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frrumana%2Frust_lecture'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6c3c083ae175b5c7112afdec97ce9ced7260811
[INFO] checking rrumana/rust_lecture against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frrumana%2Frust_lecture" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rrumana/rust_lecture
[INFO] finished tweaking git repo https://github.com/rrumana/rust_lecture
[INFO] tweaked toml for git repo https://github.com/rrumana/rust_lecture written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rrumana/rust_lecture on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rrumana/rust_lecture 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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "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] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bd64af09a9a1a3ffa80bbc9f75420168ff85894778e924f74d2d44ec41eba2b
[INFO] running `Command { std: "docker" "start" "-a" "3bd64af09a9a1a3ffa80bbc9f75420168ff85894778e924f74d2d44ec41eba2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bd64af09a9a1a3ffa80bbc9f75420168ff85894778e924f74d2d44ec41eba2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bd64af09a9a1a3ffa80bbc9f75420168ff85894778e924f74d2d44ec41eba2b", kill_on_drop: false }`
[INFO] [stdout] 3bd64af09a9a1a3ffa80bbc9f75420168ff85894778e924f74d2d44ec41eba2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5606648f3227f8dc34334648c7f3ffa93652c197e5a07fc4f64b2c48788617c4
[INFO] running `Command { std: "docker" "start" "-a" "5606648f3227f8dc34334648c7f3ffa93652c197e5a07fc4f64b2c48788617c4", kill_on_drop: false }`
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[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/section6_idioms.rs:337:36
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn process_maybe_modify(input: &str, should_modify: bool) -> Cow<str> {
[INFO] [stdout]     |                                    ^^^^                          ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn process_maybe_modify(input: &str, should_modify: bool) -> Cow<'_, str> {
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/section6_idioms.rs:337:36
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn process_maybe_modify(input: &str, should_modify: bool) -> Cow<str> {
[INFO] [stdout]     |                                    ^^^^                          ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn process_maybe_modify(input: &str, should_modify: bool) -> Cow<'_, str> {
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 49.91s
[INFO] running `Command { std: "docker" "inspect" "5606648f3227f8dc34334648c7f3ffa93652c197e5a07fc4f64b2c48788617c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5606648f3227f8dc34334648c7f3ffa93652c197e5a07fc4f64b2c48788617c4", kill_on_drop: false }`
[INFO] [stdout] 5606648f3227f8dc34334648c7f3ffa93652c197e5a07fc4f64b2c48788617c4
