[INFO] cloning repository https://github.com/fatoche/rustbridge-workshop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fatoche/rustbridge-workshop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffatoche%2Frustbridge-workshop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffatoche%2Frustbridge-workshop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 261b8b6099756ab9b59cdebc000eb0d6f72feb89
[INFO] checking fatoche/rustbridge-workshop against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffatoche%2Frustbridge-workshop" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fatoche/rustbridge-workshop on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fatoche/rustbridge-workshop
[INFO] finished tweaking git repo https://github.com/fatoche/rustbridge-workshop
[INFO] tweaked toml for git repo https://github.com/fatoche/rustbridge-workshop written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fatoche/rustbridge-workshop 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.3
[INFO] [stderr]   Downloaded num_cpus v1.8.0
[INFO] [stderr]   Downloaded httparse v1.2.4
[INFO] [stderr]   Downloaded log v0.4.1
[INFO] [stderr]   Downloaded simple-server v0.3.0
[INFO] [stderr]   Downloaded pick-one v1.0.1
[INFO] [stderr]   Downloaded motivations v1.1.2
[INFO] [stderr]   Downloaded rand v0.3.22
[INFO] [stderr]   Downloaded iovec v0.1.2
[INFO] [stderr]   Downloaded bitflags v1.0.3
[INFO] [stderr]   Downloaded rand v0.4.2
[INFO] [stderr]   Downloaded byteorder v1.2.3
[INFO] [stderr]   Downloaded http v0.1.5
[INFO] [stderr]   Downloaded libc v0.2.41
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] [stderr]   Downloaded bytes v0.4.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 271f7a1b84a17768c8da7c6c373addd168e529dbc128ee8de48dba3875295427
[INFO] running `Command { std: "docker" "start" "-a" "271f7a1b84a17768c8da7c6c373addd168e529dbc128ee8de48dba3875295427", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "271f7a1b84a17768c8da7c6c373addd168e529dbc128ee8de48dba3875295427", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "271f7a1b84a17768c8da7c6c373addd168e529dbc128ee8de48dba3875295427", kill_on_drop: false }`
[INFO] [stdout] 271f7a1b84a17768c8da7c6c373addd168e529dbc128ee8de48dba3875295427
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14f623338558ae087dffad40890d4b960513c6ad012db5a4a56af0ef9ca9d451
[INFO] running `Command { std: "docker" "start" "-a" "14f623338558ae087dffad40890d4b960513c6ad012db5a4a56af0ef9ca9d451", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking httparse v1.2.4
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking motivations v1.1.2
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking http v0.1.5
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking pick-one v1.0.1
[INFO] [stderr]     Checking simple-server v0.3.0
[INFO] [stderr]     Checking rustbridge-workshop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `learning_main` is never used
[INFO] [stdout]   --> src/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn learning_main() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_fifty` is never used
[INFO] [stdout]   --> src/main.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn add_fifty(n: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `learning_main` is never used
[INFO] [stdout]   --> src/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn learning_main() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.78s
[INFO] running `Command { std: "docker" "inspect" "14f623338558ae087dffad40890d4b960513c6ad012db5a4a56af0ef9ca9d451", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14f623338558ae087dffad40890d4b960513c6ad012db5a4a56af0ef9ca9d451", kill_on_drop: false }`
[INFO] [stdout] 14f623338558ae087dffad40890d4b960513c6ad012db5a4a56af0ef9ca9d451