[INFO] cloning repository https://github.com/arnasjozonis/lz78
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arnasjozonis/lz78" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnasjozonis%2Flz78", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnasjozonis%2Flz78'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 873537bb7077881db9baf4021864d7a785efaa24
[INFO] checking arnasjozonis/lz78 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnasjozonis%2Flz78" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arnasjozonis/lz78 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/arnasjozonis/lz78
[INFO] finished tweaking git repo https://github.com/arnasjozonis/lz78
[INFO] tweaked toml for git repo https://github.com/arnasjozonis/lz78 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/arnasjozonis/lz78 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d5d19368c0c95f31167ca266e0deccfebd40cead7dda9e1d8c24a1d43f6daab
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7d5d19368c0c95f31167ca266e0deccfebd40cead7dda9e1d8c24a1d43f6daab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d5d19368c0c95f31167ca266e0deccfebd40cead7dda9e1d8c24a1d43f6daab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d5d19368c0c95f31167ca266e0deccfebd40cead7dda9e1d8c24a1d43f6daab", kill_on_drop: false }`
[INFO] [stdout] 7d5d19368c0c95f31167ca266e0deccfebd40cead7dda9e1d8c24a1d43f6daab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff2f969c61bf478a758780990c051557ab82cd214147c643628623a847f1cdd5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ff2f969c61bf478a758780990c051557ab82cd214147c643628623a847f1cdd5", kill_on_drop: false }`
[INFO] [stderr]     Checking bitbit v0.2.0
[INFO] [stderr]     Checking lz78 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/main.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stdout]     |                      ---------- immutable borrow occurs here
[INFO] [stdout] 136 |         dict.add_node(current_node.value, parent.index);
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stdout]     |                      ---------- immutable borrow occurs here
[INFO] [stdout] 172 |         dict.add_node(current_node.value, parent.index);
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lz78`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/main.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stdout]     |                      ---------- immutable borrow occurs here
[INFO] [stdout] 136 |         dict.add_node(current_node.value, parent.index);
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stdout]     |                      ---------- immutable borrow occurs here
[INFO] [stdout] 172 |         dict.add_node(current_node.value, parent.index);
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ff2f969c61bf478a758780990c051557ab82cd214147c643628623a847f1cdd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff2f969c61bf478a758780990c051557ab82cd214147c643628623a847f1cdd5", kill_on_drop: false }`
[INFO] [stdout] ff2f969c61bf478a758780990c051557ab82cd214147c643628623a847f1cdd5