[INFO] fetching crate cold-io 0.2.0...
[INFO] checking cold-io-0.2.0 against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950
[INFO] extracting crate cold-io 0.2.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate cold-io 0.2.0 on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cold-io 0.2.0
[INFO] finished tweaking crates.io crate cold-io 0.2.0
[INFO] tweaked toml for crates.io crate cold-io 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate cold-io 0.2.0 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" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62aadf53e6622d8a294dc0266abd3e94851fb97537c16f7f7f32056afae6c96d
[INFO] running `Command { std: "docker" "start" "-a" "62aadf53e6622d8a294dc0266abd3e94851fb97537c16f7f7f32056afae6c96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62aadf53e6622d8a294dc0266abd3e94851fb97537c16f7f7f32056afae6c96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62aadf53e6622d8a294dc0266abd3e94851fb97537c16f7f7f32056afae6c96d", kill_on_drop: false }`
[INFO] [stdout] 62aadf53e6622d8a294dc0266abd3e94851fb97537c16f7f7f32056afae6c96d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] decdd83fe0f095af6afc823fe7f1d1f330acd6c5b4b830797c10969c3e731ea9
[INFO] running `Command { std: "docker" "start" "-a" "decdd83fe0f095af6afc823fe7f1d1f330acd6c5b4b830797c10969c3e731ea9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.22.1
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking cold-io v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stdout]    --> src/proposer.rs:218:29
[INFO] [stdout]     |
[INFO] [stdout] 216 |         for addr in self.request.take_blacklist() {
[INFO] [stdout]     |                     -----------------------------
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     first mutable borrow occurs here
[INFO] [stdout]     |                     first borrow later used here
[INFO] [stdout] 217 |             self.blacklist.insert(addr.ip());
[INFO] [stdout] 218 |             if let Err(e) = self.disconnect_peer(addr) {
[INFO] [stdout]     |                             ^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stdout]    --> src/proposer.rs:226:19
[INFO] [stdout]     |
[INFO] [stdout] 225 |         for addr in self.request.take_connects() {
[INFO] [stdout]     |                     ----------------------------
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     first mutable borrow occurs here
[INFO] [stdout]     |                     first borrow later used here
[INFO] [stdout] 226 |             match self.connect_peer(addr) {
[INFO] [stdout]     |                   ^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stdout]    --> src/proposer.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 225 |         for addr in self.request.take_connects() {
[INFO] [stdout]     |                     ----------------------------
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     first mutable borrow occurs here
[INFO] [stdout]     |                     first borrow later used here
[INFO] [stdout] ...
[INFO] [stdout] 238 |                     self.send_proposal(rngs.next().unwrap(), state, kind);
[INFO] [stdout]     |                     ^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cold-io` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "decdd83fe0f095af6afc823fe7f1d1f330acd6c5b4b830797c10969c3e731ea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "decdd83fe0f095af6afc823fe7f1d1f330acd6c5b4b830797c10969c3e731ea9", kill_on_drop: false }`
[INFO] [stdout] decdd83fe0f095af6afc823fe7f1d1f330acd6c5b4b830797c10969c3e731ea9