[INFO] cloning repository https://github.com/Yougigun/rust_for_rustaceans
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yougigun/rust_for_rustaceans" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYougigun%2Frust_for_rustaceans", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYougigun%2Frust_for_rustaceans'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8677dac2ef03217bf2e18a2f90e96bed30bb10c8
[INFO] checking Yougigun/rust_for_rustaceans/8677dac2ef03217bf2e18a2f90e96bed30bb10c8 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYougigun%2Frust_for_rustaceans" "/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/Yougigun/rust_for_rustaceans on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Yougigun/rust_for_rustaceans
[INFO] finished tweaking git repo https://github.com/Yougigun/rust_for_rustaceans
[INFO] tweaked toml for git repo https://github.com/Yougigun/rust_for_rustaceans written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Yougigun/rust_for_rustaceans 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" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7155366266d042adb6d261c2df6c540700a22da1209e50e184f179443c433ae0
[INFO] running `Command { std: "docker" "start" "-a" "7155366266d042adb6d261c2df6c540700a22da1209e50e184f179443c433ae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7155366266d042adb6d261c2df6c540700a22da1209e50e184f179443c433ae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7155366266d042adb6d261c2df6c540700a22da1209e50e184f179443c433ae0", kill_on_drop: false }`
[INFO] [stdout] 7155366266d042adb6d261c2df6c540700a22da1209e50e184f179443c433ae0
[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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e61657d5b730abcb45bf5950b053ab6576b7f167ee8bf904f1f140d61eb5637
[INFO] running `Command { std: "docker" "start" "-a" "4e61657d5b730abcb45bf5950b053ab6576b7f167ee8bf904f1f140d61eb5637", kill_on_drop: false }`
[INFO] [stderr]     Checking listing_1-2 v0.1.0 (/opt/rustwide/workdir/listing_1-2)
[INFO] [stdout] error[E0506]: cannot assign to `x` because it is borrowed
[INFO] [stdout]   --> listing_1-2/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 7  |     let y = &x;
[INFO] [stdout]    |             -- `x` is borrowed here
[INFO] [stdout] 8  |     // this establishes a second, mutable flow from x:
[INFO] [stdout] 9  |     x = 43;
[INFO] [stdout]    |     ^^^^^^ `x` is assigned to here but it was already borrowed
[INFO] [stdout] ...
[INFO] [stdout] 12 |     assert_eq!(*y, 42);
[INFO] [stdout]    |     ------------------ borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0506]: cannot assign to `x` because it is borrowed
[INFO] [stdout]   --> listing_1-2/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 7  |     let y = &x;
[INFO] [stdout]    |             -- `x` is borrowed here
[INFO] [stdout] 8  |     // this establishes a second, mutable flow from x:
[INFO] [stdout] 9  |     x = 43;
[INFO] [stdout]    |     ^^^^^^ `x` is assigned to here but it was already borrowed
[INFO] [stdout] ...
[INFO] [stdout] 12 |     assert_eq!(*y, 42);
[INFO] [stdout]    |     ------------------ borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0506`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0506`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `listing_1-2` (bin "listing_1-2") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `listing_1-2` (bin "listing_1-2" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4e61657d5b730abcb45bf5950b053ab6576b7f167ee8bf904f1f140d61eb5637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e61657d5b730abcb45bf5950b053ab6576b7f167ee8bf904f1f140d61eb5637", kill_on_drop: false }`
[INFO] [stdout] 4e61657d5b730abcb45bf5950b053ab6576b7f167ee8bf904f1f140d61eb5637