[INFO] cloning repository https://github.com/Eson-Jia/rust-play-ground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Eson-Jia/rust-play-ground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd185b73c3e92aa42d4c73412360dff9e16f1e7c
[INFO] checking Eson-Jia/rust-play-ground against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Eson-Jia/rust-play-ground on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Eson-Jia/rust-play-ground
[INFO] finished tweaking git repo https://github.com/Eson-Jia/rust-play-ground
[INFO] tweaked toml for git repo https://github.com/Eson-Jia/rust-play-ground written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Eson-Jia/rust-play-ground 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a957b4c545c693c1d84cb65929796b170b30c4ff65ff79589ea3c1437ea95a7e
[INFO] running `Command { std: "docker" "start" "-a" "a957b4c545c693c1d84cb65929796b170b30c4ff65ff79589ea3c1437ea95a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a957b4c545c693c1d84cb65929796b170b30c4ff65ff79589ea3c1437ea95a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a957b4c545c693c1d84cb65929796b170b30c4ff65ff79589ea3c1437ea95a7e", kill_on_drop: false }`
[INFO] [stdout] a957b4c545c693c1d84cb65929796b170b30c4ff65ff79589ea3c1437ea95a7e
[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=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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39826891e1e2fc71fd49c484019d386445096bd3eb41f4264f3ab466615e401d
[INFO] running `Command { std: "docker" "start" "-a" "39826891e1e2fc71fd49c484019d386445096bd3eb41f4264f3ab466615e401d", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking play-ground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/bin/vector.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let first =  &v[0];
[INFO] [stdout]    |                   - immutable borrow occurs here
[INFO] [stdout] 26 |     v.push(6);
[INFO] [stdout]    |     ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 27 |     println!("the first element is :{}",first);
[INFO] [stdout]    |                                         ----- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `play-ground` (bin "vector" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/bin/vector.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let first =  &v[0];
[INFO] [stdout]    |                   - immutable borrow occurs here
[INFO] [stdout] 26 |     v.push(6);
[INFO] [stdout]    |     ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 27 |     println!("the first element is :{}",first);
[INFO] [stdout]    |                                         ----- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `play-ground` (bin "vector") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "39826891e1e2fc71fd49c484019d386445096bd3eb41f4264f3ab466615e401d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39826891e1e2fc71fd49c484019d386445096bd3eb41f4264f3ab466615e401d", kill_on_drop: false }`
[INFO] [stdout] 39826891e1e2fc71fd49c484019d386445096bd3eb41f4264f3ab466615e401d
[INFO] checking Eson-Jia/rust-play-ground against try#dae34b759e282c069aa28752564694effd121a63 for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Eson-Jia/rust-play-ground on toolchain dae34b759e282c069aa28752564694effd121a63
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Eson-Jia/rust-play-ground
[INFO] finished tweaking git repo https://github.com/Eson-Jia/rust-play-ground
[INFO] tweaked toml for git repo https://github.com/Eson-Jia/rust-play-ground written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Eson-Jia/rust-play-ground 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" "+dae34b759e282c069aa28752564694effd121a63" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f86ec6e2a8892b9235da82f49a586a833ed45e13ba31393dd4601f0b9e59b602
[INFO] running `Command { std: "docker" "start" "-a" "f86ec6e2a8892b9235da82f49a586a833ed45e13ba31393dd4601f0b9e59b602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f86ec6e2a8892b9235da82f49a586a833ed45e13ba31393dd4601f0b9e59b602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f86ec6e2a8892b9235da82f49a586a833ed45e13ba31393dd4601f0b9e59b602", kill_on_drop: false }`
[INFO] [stdout] f86ec6e2a8892b9235da82f49a586a833ed45e13ba31393dd4601f0b9e59b602
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9e0adb10bd73953406f14dc6ef0ba46b9ae2b11fcb941630d57a96cf1ec7a67
[INFO] running `Command { std: "docker" "start" "-a" "f9e0adb10bd73953406f14dc6ef0ba46b9ae2b11fcb941630d57a96cf1ec7a67", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "f9e0adb10bd73953406f14dc6ef0ba46b9ae2b11fcb941630d57a96cf1ec7a67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9e0adb10bd73953406f14dc6ef0ba46b9ae2b11fcb941630d57a96cf1ec7a67", kill_on_drop: false }`
[INFO] [stdout] f9e0adb10bd73953406f14dc6ef0ba46b9ae2b11fcb941630d57a96cf1ec7a67