[INFO] cloning repository https://github.com/rjyo/rustlings_answers [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rjyo/rustlings_answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjyo%2Frustlings_answers", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjyo%2Frustlings_answers'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ea9b707d5c58334cc191f5789ce4c27707a71cb2 [INFO] building rjyo/rustlings_answers against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjyo%2Frustlings_answers" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] finished tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] tweaked toml for git repo https://github.com/rjyo/rustlings_answers written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/rjyo/rustlings_answers on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/rjyo/rustlings_answers 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [INFO] building rjyo/rustlings_answers against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjyo%2Frustlings_answers" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] finished tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] tweaked toml for git repo https://github.com/rjyo/rustlings_answers written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/rjyo/rustlings_answers on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/rjyo/rustlings_answers 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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 [ERROR] error running command: no output for 300 seconds [INFO] building rjyo/rustlings_answers against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjyo%2Frustlings_answers" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] finished tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] tweaked toml for git repo https://github.com/rjyo/rustlings_answers written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/rjyo/rustlings_answers on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/rjyo/rustlings_answers 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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 [ERROR] error running command: no output for 300 seconds [INFO] building rjyo/rustlings_answers against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjyo%2Frustlings_answers" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] finished tweaking git repo https://github.com/rjyo/rustlings_answers [INFO] tweaked toml for git repo https://github.com/rjyo/rustlings_answers written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/rjyo/rustlings_answers on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/rjyo/rustlings_answers 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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 ... [INFO] [stderr] Downloaded float-cmp v0.8.0 [INFO] [stderr] Downloaded predicates-core v1.0.0 [INFO] [stderr] Downloaded predicates v1.0.5 [INFO] [stderr] Downloaded smallvec v1.5.1 [INFO] [stderr] Downloaded treeline v0.1.0 [INFO] [stderr] Downloaded escargot v0.4.0 [INFO] [stderr] Downloaded ansi_term v0.11.0 [INFO] [stderr] Downloaded hermit-abi v0.1.17 [INFO] [stderr] Downloaded console v0.7.7 [INFO] [stderr] Downloaded console v0.13.0 [INFO] [stderr] Downloaded parking_lot_core v0.8.1 [INFO] [stderr] Downloaded filetime v0.2.13 [INFO] [stderr] Downloaded terminal_size v0.1.15 [INFO] [stderr] Downloaded syn v1.0.55 [INFO] [stderr] Downloaded assert_cmd v0.11.1 [INFO] [stderr] Downloaded libc v0.2.81 [INFO] [stderr] Downloaded termios v0.3.3 [INFO] [stderr] Downloaded serde_json v1.0.60 [INFO] [stderr] Downloaded unicode-width v0.1.8 [INFO] [stderr] Downloaded indicatif v0.10.3 [INFO] [stderr] Downloaded inotify-sys v0.1.4 [INFO] [stderr] Downloaded predicates-tree v1.0.0 [INFO] [stderr] Downloaded clicolors-control v1.0.1 [INFO] [stderr] Downloaded clap v2.33.3 [INFO] [stderr] Downloaded number_prefix v0.2.8 [INFO] [stderr] Downloaded quote v1.0.8 [INFO] [stderr] Downloaded serde_derive v1.0.118 [INFO] [stderr] Downloaded toml v0.4.10 [INFO] [stderr] Downloaded serde v1.0.118 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 358db9cd4670ce0373d82d3762985b273e9d31a330acf82f1c4732e395334f7c [INFO] running `Command { std: "docker" "start" "-a" "358db9cd4670ce0373d82d3762985b273e9d31a330acf82f1c4732e395334f7c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "358db9cd4670ce0373d82d3762985b273e9d31a330acf82f1c4732e395334f7c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "358db9cd4670ce0373d82d3762985b273e9d31a330acf82f1c4732e395334f7c", kill_on_drop: false }` [INFO] [stdout] 358db9cd4670ce0373d82d3762985b273e9d31a330acf82f1c4732e395334f7c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 10e3dd311741a0e49a81dbf10ce56ced35d3f8d638c0544f755ca82c84be662b [INFO] running `Command { std: "docker" "start" "-a" "10e3dd311741a0e49a81dbf10ce56ced35d3f8d638c0544f755ca82c84be662b", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.81 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling log v0.4.11 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling syn v1.0.55 [INFO] [stderr] Compiling unicode-width v0.1.8 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling regex-syntax v0.6.21 [INFO] [stderr] Compiling serde_derive v1.0.118 [INFO] [stderr] Compiling smallvec v1.5.1 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling instant v0.1.9 [INFO] [stderr] Compiling lock_api v0.4.2 [INFO] [stderr] Compiling serde v1.0.118 [INFO] [stderr] Compiling slab v0.4.2 [INFO] [stderr] Compiling lazycell v1.3.0 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Compiling walkdir v2.3.1 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling vec_map v0.8.2 [INFO] [stderr] Compiling ansi_term v0.11.0 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling parking_lot_core v0.8.1 [INFO] [stderr] Compiling net2 v0.2.37 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling terminal_size v0.1.15 [INFO] [stderr] Compiling aho-corasick v0.7.15 [INFO] [stderr] Compiling inotify-sys v0.1.4 [INFO] [stderr] Compiling filetime v0.2.13 [INFO] [stderr] Compiling parking_lot v0.11.1 [INFO] [stderr] Compiling inotify v0.7.1 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Compiling mio v0.6.23 [INFO] [stderr] Compiling termios v0.3.3 [INFO] [stderr] Compiling clicolors-control v1.0.1 [INFO] [stderr] Compiling clap v2.33.3 [INFO] [stderr] Compiling rand v0.5.6 [INFO] [stderr] Compiling regex v1.4.2 [INFO] [stderr] Compiling mio-extras v2.0.6 [INFO] [stderr] Compiling number_prefix v0.2.8 [INFO] [stderr] Compiling notify v4.0.15 [INFO] [stderr] Compiling console v0.13.0 [INFO] [stderr] Compiling console v0.7.7 [INFO] [stderr] Compiling indicatif v0.10.3 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling rustlings v4.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:108:20 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn compile(&self) -> Result { [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] 108 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.06s [INFO] running `Command { std: "docker" "inspect" "10e3dd311741a0e49a81dbf10ce56ced35d3f8d638c0544f755ca82c84be662b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "10e3dd311741a0e49a81dbf10ce56ced35d3f8d638c0544f755ca82c84be662b", kill_on_drop: false }` [INFO] [stdout] 10e3dd311741a0e49a81dbf10ce56ced35d3f8d638c0544f755ca82c84be662b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b0d86dc8505148e7728c76e6464f91f3eb056fe8e47e7988449f991169c8a4fb [INFO] running `Command { std: "docker" "start" "-a" "b0d86dc8505148e7728c76e6464f91f3eb056fe8e47e7988449f991169c8a4fb", kill_on_drop: false }` [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling serde_json v1.0.60 [INFO] [stderr] Compiling itoa v0.4.6 [INFO] [stderr] Compiling predicates-core v1.0.0 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Compiling float-cmp v0.8.0 [INFO] [stderr] Compiling normalize-line-endings v0.3.0 [INFO] [stderr] Compiling treeline v0.1.0 [INFO] [stderr] Compiling difference v2.0.0 [INFO] [stderr] Compiling glob v0.3.0 [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:108:20 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn compile(&self) -> Result { [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] 108 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling predicates-tree v1.0.0 [INFO] [stderr] Compiling predicates v1.0.5 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v4.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:108:20 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn compile(&self) -> Result { [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] 108 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.32s [INFO] running `Command { std: "docker" "inspect" "b0d86dc8505148e7728c76e6464f91f3eb056fe8e47e7988449f991169c8a4fb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b0d86dc8505148e7728c76e6464f91f3eb056fe8e47e7988449f991169c8a4fb", kill_on_drop: false }` [INFO] [stdout] b0d86dc8505148e7728c76e6464f91f3eb056fe8e47e7988449f991169c8a4fb