[INFO] cloning repository https://github.com/fstnetwork/etherinit [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fstnetwork/etherinit" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffstnetwork%2Fetherinit", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffstnetwork%2Fetherinit'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 9201440b12a2b2f2e8c570f25aed259ad0d6ad70 [INFO] checking fstnetwork/etherinit against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffstnetwork%2Fetherinit" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/fstnetwork/etherinit on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/fstnetwork/etherinit [INFO] finished tweaking git repo https://github.com/fstnetwork/etherinit [INFO] tweaked toml for git repo https://github.com/fstnetwork/etherinit written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/fstnetwork/etherinit already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e2c9ae0ec334dba846be4c443004fbba55d6671e9d882ac69b28302c8fc0bb9a [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" "e2c9ae0ec334dba846be4c443004fbba55d6671e9d882ac69b28302c8fc0bb9a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e2c9ae0ec334dba846be4c443004fbba55d6671e9d882ac69b28302c8fc0bb9a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e2c9ae0ec334dba846be4c443004fbba55d6671e9d882ac69b28302c8fc0bb9a", kill_on_drop: false }` [INFO] [stdout] e2c9ae0ec334dba846be4c443004fbba55d6671e9d882ac69b28302c8fc0bb9a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 4c879ef9418cd697fcf00fa63445586011af070f14f3c45ac8f9ea775d20bffe [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" "4c879ef9418cd697fcf00fa63445586011af070f14f3c45ac8f9ea775d20bffe", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.51 [INFO] [stderr] Compiling byteorder v1.3.1 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Compiling autocfg v0.1.2 [INFO] [stderr] Checking rand_core v0.4.0 [INFO] [stderr] Compiling proc-macro2 v0.4.27 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling syn v0.15.32 [INFO] [stderr] Checking nodrop v0.1.13 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Checking futures v0.1.26 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling version_check v0.1.5 [INFO] [stderr] Checking memoffset v0.2.1 [INFO] [stderr] Compiling serde v1.0.90 [INFO] [stderr] Checking fnv v1.0.6 [INFO] [stderr] Checking stable_deref_trait v1.1.1 [INFO] [stderr] Compiling crunchy v0.1.6 [INFO] [stderr] Compiling heapsize v0.4.2 [INFO] [stderr] Compiling num-integer v0.1.39 [INFO] [stderr] Checking rustc-hex v2.0.1 [INFO] [stderr] Compiling gcc v0.3.55 [INFO] [stderr] Checking opaque-debug v0.2.2 [INFO] [stderr] Checking constant_time_eq v0.1.3 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Checking byte-tools v0.2.0 [INFO] [stderr] Checking encoding_index_tests v0.1.4 [INFO] [stderr] Compiling httparse v1.3.3 [INFO] [stderr] Compiling memchr v2.2.0 [INFO] [stderr] Compiling num-iter v0.1.37 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Checking arrayref v0.3.5 [INFO] [stderr] Compiling openssl v0.10.20 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Checking subtle v1.0.0 [INFO] [stderr] Checking either v1.5.2 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Checking ucd-util v0.1.3 [INFO] [stderr] Compiling regex v1.1.6 [INFO] [stderr] Checking rustc-demangle v0.1.14 [INFO] [stderr] Compiling crunchy v0.2.1 [INFO] [stderr] Compiling unicode-xid v0.0.4 [INFO] [stderr] Checking utf8-ranges v1.0.2 [INFO] 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crossbeam-utils v0.2.2 [INFO] [stderr] Compiling backtrace-sys v0.1.28 [INFO] [stderr] Compiling ring v0.14.6 [INFO] [stderr] Compiling secp256k1 v0.12.2 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling rand_jitter v0.1.3 [INFO] [stderr] Checking crossbeam-utils v0.6.5 [INFO] [stderr] Checking tokio-trace-core v0.1.0 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking owning_ref v0.4.0 [INFO] [stderr] Checking block-padding v0.1.3 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Checking encoding-index-japanese v1.20141219.5 [INFO] [stderr] Checking encoding-index-korean v1.20141219.5 [INFO] [stderr] Checking encoding-index-singlebyte v1.20141219.5 [INFO] [stderr] Checking encoding-index-simpchinese v1.20141219.5 [INFO] [stderr] Checking encoding-index-tradchinese v1.20141219.5 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking block-buffer v0.3.3 [INFO] [stderr] Compiling unicase v1.4.2 [INFO] [stderr] Compiling unicase v2.3.0 [INFO] [stderr] Checking humantime v1.2.0 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling backtrace v0.3.15 [INFO] [stderr] Checking regex-syntax v0.6.6 [INFO] [stderr] Compiling synom v0.11.3 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking bitcoin-bech32 v0.5.1 [INFO] [stderr] Checking arrayvec v0.4.10 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Checking lock_api v0.1.5 [INFO] [stderr] Checking tokio-sync v0.1.4 [INFO] [stderr] Checking want v0.0.6 [INFO] [stderr] Checking tower-service v0.1.0 [INFO] [stderr] Checking tokio-timer v0.1.2 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Checking tokio-executor v0.1.7 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling rust-crypto v0.2.36 [INFO] [stderr] Compiling secp256k1 v0.9.2 [INFO] [stderr] Checking generic-array v0.8.3 [INFO] [stderr] Checking generic-array v0.9.0 [INFO] [stderr] Compiling syn v0.11.11 [INFO] [stderr] Checking checked v0.5.0 [INFO] [stderr] Checking atoi v0.2.3 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Checking encoding v0.2.33 [INFO] [stderr] Checking crossbeam-epoch v0.7.1 [INFO] [stderr] Checking crossbeam-epoch v0.3.1 [INFO] [stderr] Checking tiny-keccak v1.4.2 [INFO] [stderr] Checking tokio-current-thread v0.1.6 [INFO] [stderr] Checking tokio-timer v0.2.10 [INFO] [stderr] Checking digest v0.8.0 [INFO] [stderr] Checking crypto-mac v0.7.0 [INFO] [stderr] Checking block-cipher-trait v0.6.2 [INFO] [stderr] Checking stream-cipher v0.3.0 [INFO] [stderr] Checking base64 v0.9.3 [INFO] [stderr] Checking block-buffer v0.7.3 [INFO] [stderr] Checking base64 v0.10.1 [INFO] [stderr] Checking uint v0.4.1 [INFO] [stderr] Checking uint v0.5.0 [INFO] [stderr] Checking digest v0.6.2 [INFO] [stderr] Checking crypto-mac v0.4.0 [INFO] [stderr] Checking block-buffer v0.2.0 [INFO] [stderr] Checking digest v0.7.6 [INFO] [stderr] Checking crypto-mac v0.6.2 [INFO] [stderr] Compiling parking_lot_core v0.4.0 [INFO] [stderr] Compiling openssl-sys v0.9.43 [INFO] [stderr] Checking num_cpus v1.10.0 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking rand v0.5.6 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking signal-hook v0.1.8 [INFO] [stderr] Checking miniz-sys v0.1.11 [INFO] [stderr] Checking thread-id v3.3.0 [INFO] [stderr] Checking aho-corasick v0.7.3 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Checking phf_shared v0.7.24 [INFO] [stderr] Checking hmac v0.7.0 [INFO] [stderr] Checking crossbeam-deque v0.2.0 [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] Checking aes-soft v0.3.3 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking sha2 v0.8.0 [INFO] [stderr] Checking sha-1 v0.8.1 [INFO] [stderr] Checking ctr v0.3.2 [INFO] [stderr] Checking hmac v0.4.2 [INFO] [stderr] Checking sha2 v0.7.1 [INFO] [stderr] Checking hmac v0.6.3 [INFO] [stderr] Checking sha2 v0.6.0 [INFO] [stderr] Checking futures-cpupool v0.1.8 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking flate2 v1.0.7 [INFO] [stderr] Checking simple-logging v2.0.2 [INFO] [stderr] Checking mio v0.6.16 [INFO] [stderr] Checking num v0.1.42 [INFO] [stderr] Checking chrono v0.4.6 [INFO] [stderr] Checking mime v0.3.13 [INFO] [stderr] Checking phf v0.7.24 [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking fixed-hash v0.2.5 [INFO] [stderr] Checking rayon-core v1.4.1 [INFO] [stderr] Checking hmac-drbg v0.1.2 [INFO] [stderr] Checking aes-ctr v0.3.0 [INFO] [stderr] Checking serde v0.6.15 [INFO] [stderr] Checking error-chain v0.12.0 [INFO] [stderr] Checking hyper v0.10.15 [INFO] [stderr] Checking libsecp256k1 v0.2.2 [INFO] [stderr] Checking tokio-io v0.1.12 [INFO] [stderr] Checking http v0.1.17 [INFO] [stderr] Checking fixed-hash v0.3.0 [INFO] [stderr] Checking pbkdf2 v0.2.3 [INFO] [stderr] Compiling native-tls v0.2.2 [INFO] [stderr] Checking rayon v1.0.3 [INFO] [stderr] Checking mio-uds v0.6.7 [INFO] [stderr] Checking scrypt v0.1.2 [INFO] [stderr] Checking tokio-codec v0.1.1 [INFO] [stderr] Checking tokio-threadpool v0.1.13 [INFO] [stderr] Compiling phf_generator v0.7.24 [INFO] [stderr] Checking num v0.2.0 [INFO] [stderr] Compiling pest_derive v1.0.8 [INFO] [stderr] Compiling phf_codegen v0.7.24 [INFO] [stderr] Checking parking_lot v0.7.1 [INFO] [stderr] Checking strason v0.3.4 [INFO] [stderr] Compiling mime_guess v1.8.6 [INFO] [stderr] Checking tokio-reactor v0.1.9 [INFO] [stderr] Checking tokio-fs v0.1.6 [INFO] [stderr] Checking env_logger v0.6.1 [INFO] [stderr] Checking tokio-tcp v0.1.3 [INFO] [stderr] Checking tokio-udp v0.1.3 [INFO] [stderr] Checking tokio-uds v0.2.5 [INFO] [stderr] Checking tokio-signal v0.2.7 [INFO] [stderr] Checking tokio v0.1.18 [INFO] [stderr] Checking tokio-process v0.2.3 [INFO] [stderr] Checking h2 v0.1.18 [INFO] [stderr] Checking headers-core v0.1.0 [INFO] [stderr] Checking pbkdf2 v0.3.0 [INFO] [stderr] Checking scrypt v0.2.0 [INFO] [stderr] Checking ethsign-crypto v0.1.0 (https://github.com/fstnetwork/ethsign?tag=v0.5.1#d0342032) [INFO] [stderr] Checking parity-crypto v0.3.0 [INFO] [stderr] Checking bitcoin v0.13.2 [INFO] [stderr] Checking tokio-tls v0.2.1 [INFO] [stderr] Checking websocket v0.22.3 [INFO] [stderr] Checking hyper v0.12.27 [INFO] [stderr] Compiling synstructure v0.10.1 [INFO] [stderr] Checking hyper-tls v0.3.2 [INFO] [stderr] Compiling serde_derive v1.0.90 [INFO] [stderr] Compiling headers-derive v0.1.0 [INFO] [stderr] Compiling structopt-derive v0.2.18 [INFO] [stderr] Compiling tower-web-macros v0.3.5 [INFO] [stderr] Checking headers v0.2.1 [INFO] [stderr] Checking failure v0.1.5 [INFO] [stderr] Checking structopt v0.2.18 [INFO] [stderr] Checking ethereum-types-serialize v0.2.2 [INFO] [stderr] Checking serde_json v1.0.39 [INFO] [stderr] Checking serde_urlencoded v0.5.5 [INFO] [stderr] Checking serde_plain v0.3.0 [INFO] [stderr] Checking ethsign v0.5.1 (https://github.com/fstnetwork/ethsign?tag=v0.5.1#d0342032) [INFO] [stderr] Checking toml v0.4.10 [INFO] [stderr] Checking ethbloom v0.5.3 [INFO] [stderr] Checking ethbloom v0.6.2 [INFO] [stderr] Checking ethereum-types v0.4.2 [INFO] [stderr] Checking ethereum-types v0.5.2 [INFO] [stderr] Checking jsonrpc-core v10.1.0 [INFO] [stderr] Checking handlebars v1.0.5 [INFO] [stderr] Checking ethabi v6.1.0 [INFO] [stderr] Checking hdwallet v0.1.0 (https://github.com/fstnetwork/hdwallet-rs?tag=v0.1.0#d1d4708c) [INFO] [stderr] Checking web3 v0.6.0 (https://github.com/fstnetwork/rust-web3?branch=develop#40cac201) [INFO] [stderr] Checking tower-web v0.3.7 [INFO] [stderr] Checking etherinit v0.3.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/network_keeper/register.rs:158:31 [INFO] [stdout] | [INFO] [stdout] 158 | let mut futs: Vec + Send>> = Vec::with_capacity(3); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Future + Send` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/network_keeper/register.rs:158:31 [INFO] [stdout] | [INFO] [stdout] 158 | let mut futs: Vec + Send>> = Vec::with_capacity(3); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Future + Send` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `fetch_rpc_endpoints` [INFO] [stdout] --> src/bootnode/client/mod.rs:178:12 [INFO] [stdout] | [INFO] [stdout] 178 | pub fn fetch_rpc_endpoints( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `fetch_http_rpc_endpoints` [INFO] [stdout] --> src/bootnode/client/mod.rs:202:12 [INFO] [stdout] | [INFO] [stdout] 202 | pub fn fetch_http_rpc_endpoints( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `fetch_ws_jsonrpc_endpoints` [INFO] [stdout] --> src/bootnode/client/mod.rs:209:12 [INFO] [stdout] | [INFO] [stdout] 209 | pub fn fetch_ws_jsonrpc_endpoints( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `fetch_rpc_endpoints` [INFO] [stdout] --> src/bootnode/client/mod.rs:178:12 [INFO] [stdout] | [INFO] [stdout] 178 | pub fn fetch_rpc_endpoints( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `fetch_http_rpc_endpoints` [INFO] [stdout] --> src/bootnode/client/mod.rs:202:12 [INFO] [stdout] | [INFO] [stdout] 202 | pub fn fetch_http_rpc_endpoints( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `fetch_ws_jsonrpc_endpoints` [INFO] [stdout] --> src/bootnode/client/mod.rs:209:12 [INFO] [stdout] | [INFO] [stdout] 209 | pub fn fetch_ws_jsonrpc_endpoints( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/ethereum_controller/controller.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | / std::mem::replace( [INFO] [stdout] 39 | | &mut self.ethereum_process, [INFO] [stdout] 40 | | Some( [INFO] [stdout] 41 | | self.ethereum_launcher [INFO] [stdout] ... | [INFO] [stdout] 44 | | ), [INFO] [stdout] 45 | | ); [INFO] [stdout] | |__________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/ethereum_controller/controller.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | std::mem::replace(&mut self.ethereum_process, None); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/ethereum_controller/controller.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | / std::mem::replace( [INFO] [stdout] 39 | | &mut self.ethereum_process, [INFO] [stdout] 40 | | Some( [INFO] [stdout] 41 | | self.ethereum_launcher [INFO] [stdout] ... | [INFO] [stdout] 44 | | ), [INFO] [stdout] 45 | | ); [INFO] [stdout] | |__________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/ethereum_controller/controller.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | std::mem::replace(&mut self.ethereum_process, None); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 3m 40s [INFO] running `Command { std: "docker" "inspect" "4c879ef9418cd697fcf00fa63445586011af070f14f3c45ac8f9ea775d20bffe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4c879ef9418cd697fcf00fa63445586011af070f14f3c45ac8f9ea775d20bffe", kill_on_drop: false }` [INFO] [stdout] 4c879ef9418cd697fcf00fa63445586011af070f14f3c45ac8f9ea775d20bffe