[INFO] cloning repository https://github.com/l-henri/cairo1-starklings-sols
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/l-henri/cairo1-starklings-sols" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fl-henri%2Fcairo1-starklings-sols", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fl-henri%2Fcairo1-starklings-sols'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7ad459119cb59dda885fd2c0e0a57c340e2df44
[INFO] testing l-henri/cairo1-starklings-sols against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fl-henri%2Fcairo1-starklings-sols" "/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/l-henri/cairo1-starklings-sols
[INFO] finished tweaking git repo https://github.com/l-henri/cairo1-starklings-sols
[INFO] tweaked toml for git repo https://github.com/l-henri/cairo1-starklings-sols written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/l-henri/cairo1-starklings-sols on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/l-henri/cairo1-starklings-sols 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/starkware-libs/cairo`
[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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b31ea7dcd5e39d84cfa26c59c18d36655c1f94a187ce417322d99d65791759e7
[INFO] running `Command { std: "docker" "start" "-a" "b31ea7dcd5e39d84cfa26c59c18d36655c1f94a187ce417322d99d65791759e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b31ea7dcd5e39d84cfa26c59c18d36655c1f94a187ce417322d99d65791759e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b31ea7dcd5e39d84cfa26c59c18d36655c1f94a187ce417322d99d65791759e7", kill_on_drop: false }`
[INFO] [stdout] b31ea7dcd5e39d84cfa26c59c18d36655c1f94a187ce417322d99d65791759e7
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac37668a4c601491f2a133d51cfd38f48a2d25590d8313e1bfe3b67087110e3a
[INFO] running `Command { std: "docker" "start" "-a" "ac37668a4c601491f2a133d51cfd38f48a2d25590d8313e1bfe3b67087110e3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
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[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling console v0.15.4
[INFO] [stderr]    Compiling cairo-lang-sierra v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling argh_derive v0.1.10
[INFO] [stderr]    Compiling ark-ff v0.4.0-alpha.7
[INFO] [stderr]    Compiling cairo-lang-defs v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling filetime v0.2.19
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling rayon v0.9.0
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling starknet-crypto v0.2.0
[INFO] [stderr]    Compiling argh v0.1.10
[INFO] [stderr]    Compiling cairo-lang-semantic v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-sierra-ap-change v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-sierra-gas v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-vm v0.1.3
[INFO] [stderr]    Compiling toml v0.5.10
[INFO] [stderr]    Compiling cairo-lang-sierra-to-casm v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling home v0.5.4
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling cairo-lang-lowering v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-plugins v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-sierra-generator v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-compiler v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-runner v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling cairo-lang-starknet v1.0.0-alpha.2 (https://github.com/starkware-libs/cairo?rev=1991669a0453bd65541ff81a12772bac05130052#1991669a)
[INFO] [stderr]    Compiling starklings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `starklings` (bin "cairo-run") due to 1 previous error
[INFO] [stdout] error: couldn't read `src/cli.rs`: No such file or directory (os error 2)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:275:44
[INFO] [stdout]     |
[INFO] [stdout] 275 |             exercises.iter_mut().for_each(|mut ex| {
[INFO] [stdout]     |                                            ----^^
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `temp_file` is never used
[INFO] [stdout]   --> src/exercise.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn temp_file() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExerciseOutput` is never constructed
[INFO] [stdout]   --> src/exercise.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct ExerciseOutput {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileHandle` is never constructed
[INFO] [stdout]   --> src/exercise.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | struct FileHandle;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clean` is never used
[INFO] [stdout]    --> src/exercise.rs:174:4
[INFO] [stdout]     |
[INFO] [stdout] 174 | fn clean() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/starklings_runner.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn main() -> anyhow::Result<()> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/starklings_tester.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn main() -> anyhow::Result<()> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ac37668a4c601491f2a133d51cfd38f48a2d25590d8313e1bfe3b67087110e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac37668a4c601491f2a133d51cfd38f48a2d25590d8313e1bfe3b67087110e3a", kill_on_drop: false }`
[INFO] [stdout] ac37668a4c601491f2a133d51cfd38f48a2d25590d8313e1bfe3b67087110e3a