[INFO] fetching crate qmc 3.0.0-rc4...
[INFO] checking qmc-3.0.0-rc4 against try#8e819ff5434466e9a823e03871a1775ac7d84ddf for pr-156027
[INFO] extracting crate qmc 3.0.0-rc4 into /workspace/builds/worker-6-tc2/source
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate qmc 3.0.0-rc4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate qmc 3.0.0-rc4
[INFO] tweaked toml for crates.io crate qmc 3.0.0-rc4 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate qmc 3.0.0-rc4 on toolchain 8e819ff5434466e9a823e03871a1775ac7d84ddf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate qmc 3.0.0-rc4 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" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da50f7b8a3583251e4b27317171cf0f81b0ed2bcb693fb1facd2fb995bce4b17
[INFO] running `Command { std: "docker" "start" "-a" "da50f7b8a3583251e4b27317171cf0f81b0ed2bcb693fb1facd2fb995bce4b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da50f7b8a3583251e4b27317171cf0f81b0ed2bcb693fb1facd2fb995bce4b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da50f7b8a3583251e4b27317171cf0f81b0ed2bcb693fb1facd2fb995bce4b17", kill_on_drop: false }`
[INFO] [stdout] da50f7b8a3583251e4b27317171cf0f81b0ed2bcb693fb1facd2fb995bce4b17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 448452f446054fb9b4fe93d9b4fa193494037cfaffd65475c4802c63ad53c378
[INFO] running `Command { std: "docker" "start" "-a" "448452f446054fb9b4fe93d9b4fa193494037cfaffd65475c4802c63ad53c378", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]     Checking jiff v0.2.16
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking regex v1.12.2
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking env_filter v0.1.4
[INFO] [stderr]     Checking qmc v3.0.0-rc4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `cluster` as mutable more than once at a time
[INFO] [stdout]   --> src/traits/cluster_update.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let val = cluster.push_cluster_leg(Leg::new(node, direction, relative_index), new_value);
[INFO] [stdout]    |                   ------- first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 68 |         for (direction, relative_index, val) in leg_changes.get_iterator() {
[INFO] [stdout]    |                                                 -------------------------- first borrow later used here
[INFO] [stdout] 69 |             cluster.push_cluster_leg(Leg::new(node, direction, relative_index), val);
[INFO] [stdout]    |             ^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `cluster` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/traits/cluster_update.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout]  97 |                 let input_state = cluster
[INFO] [stdout]     |                                   ------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 116 |                 cluster.set_leg_value(&leg, value);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 117 |                 for (direction, relative_index, val) in leg_changes.get_iterator() {
[INFO] [stdout]     |                                                         ----------- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `cluster` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/traits/cluster_update.rs:118:21
[INFO] [stdout]     |
[INFO] [stdout]  97 |                 let input_state = cluster
[INFO] [stdout]     |                                   ------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 117 |                 for (direction, relative_index, val) in leg_changes.get_iterator() {
[INFO] [stdout]     |                                                         -------------------------- immutable borrow later used here
[INFO] [stdout] 118 |                     cluster.push_cluster_leg(Leg::new(node, direction, relative_index), val);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0499, E0502.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `qmc` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "448452f446054fb9b4fe93d9b4fa193494037cfaffd65475c4802c63ad53c378", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "448452f446054fb9b4fe93d9b4fa193494037cfaffd65475c4802c63ad53c378", kill_on_drop: false }`
[INFO] [stdout] 448452f446054fb9b4fe93d9b4fa193494037cfaffd65475c4802c63ad53c378
