[INFO] cloning repository https://github.com/Osrepnay/chessapp [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Osrepnay/chessapp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsrepnay%2Fchessapp", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsrepnay%2Fchessapp'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 89361ada7220e77e877a00b36a174362b1918a42 [INFO] checking Osrepnay/chessapp against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsrepnay%2Fchessapp" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Osrepnay/chessapp on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Osrepnay/chessapp [INFO] finished tweaking git repo https://github.com/Osrepnay/chessapp [INFO] tweaked toml for git repo https://github.com/Osrepnay/chessapp written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/Osrepnay/chessapp 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded futures v0.3.16 [INFO] [stderr] Downloaded futures-executor v0.3.16 [INFO] [stderr] Downloaded futures-io v0.3.16 [INFO] [stderr] Downloaded futures-macro v0.3.16 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] fc5cc185a7a463f9faa20e983fab56345b59a3be3b4ea7079da9f1f3cea60b80 [INFO] running `Command { std: "docker" "start" "-a" "fc5cc185a7a463f9faa20e983fab56345b59a3be3b4ea7079da9f1f3cea60b80", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fc5cc185a7a463f9faa20e983fab56345b59a3be3b4ea7079da9f1f3cea60b80", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fc5cc185a7a463f9faa20e983fab56345b59a3be3b4ea7079da9f1f3cea60b80", kill_on_drop: false }` [INFO] [stdout] fc5cc185a7a463f9faa20e983fab56345b59a3be3b4ea7079da9f1f3cea60b80 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9a72a6e696c27c908efe0815c650db72f171da8408d56c2b7056300a153c820b [INFO] running `Command { std: "docker" "start" "-a" "9a72a6e696c27c908efe0815c650db72f171da8408d56c2b7056300a153c820b", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.101 [INFO] [stderr] Compiling syn v1.0.75 [INFO] [stderr] Compiling futures-core v0.3.16 [INFO] [stderr] Checking instant v0.1.10 [INFO] [stderr] Compiling futures-macro v0.3.16 [INFO] [stderr] Compiling proc-macro-nested v0.1.7 [INFO] [stderr] Compiling futures-channel v0.3.16 [INFO] [stderr] Checking smallvec v1.6.1 [INFO] [stderr] Compiling futures-task v0.3.16 [INFO] [stderr] Checking futures-sink v0.3.16 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Checking http v0.2.4 [INFO] [stderr] Compiling futures-util v0.3.16 [INFO] [stderr] Compiling tokio v1.10.1 [INFO] [stderr] Compiling unicase v2.6.0 [INFO] [stderr] Checking futures-io v0.3.16 [INFO] [stderr] Checking tinyvec v1.3.1 [INFO] [stderr] Compiling indexmap v1.7.0 [INFO] [stderr] Compiling serde v1.0.129 [INFO] [stderr] Checking unicode-bidi v0.3.6 [INFO] [stderr] Checking tracing-core v0.1.19 [INFO] [stderr] Checking sha-1 v0.9.8 [INFO] [stderr] Checking input_buffer v0.4.0 [INFO] [stderr] Checking safemem v0.3.3 [INFO] [stderr] Checking want v0.3.0 [INFO] [stderr] Checking buf_redux v0.8.4 [INFO] [stderr] Checking twoway v0.1.8 [INFO] [stderr] Checking scoped-tls v1.0.0 [INFO] [stderr] Compiling mime_guess v2.0.3 [INFO] [stderr] Checking tracing v0.1.26 [INFO] [stderr] Checking unicode-normalization v0.1.19 [INFO] [stderr] Checking parking_lot_core v0.8.5 [INFO] [stderr] Checking getrandom v0.2.3 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking mio v0.7.13 [INFO] [stderr] Checking signal-hook-registry v1.4.0 [INFO] [stderr] Checking getrandom v0.1.16 [INFO] [stderr] Checking socket2 v0.4.1 [INFO] [stderr] Checking time v0.1.43 [INFO] [stderr] Checking rand_core v0.6.3 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking parking_lot v0.11.2 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.8.4 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking idna v0.2.3 [INFO] [stderr] Checking tempfile v3.2.0 [INFO] [stderr] Checking http-body v0.4.3 [INFO] [stderr] Checking headers-core v0.2.0 [INFO] [stderr] Checking headers v0.3.4 [INFO] [stderr] Checking multipart v0.17.1 [INFO] [stderr] Checking url v2.2.2 [INFO] [stderr] Checking serde_json v1.0.66 [INFO] [stderr] Checking serde_urlencoded v0.7.0 [INFO] [stderr] Checking tungstenite v0.12.0 [INFO] [stderr] Compiling tokio-macros v1.3.0 [INFO] [stderr] Compiling pin-project-internal v1.0.8 [INFO] [stderr] Checking pin-project v1.0.8 [INFO] [stderr] Checking futures-executor v0.3.16 [INFO] [stderr] Checking futures v0.3.16 [INFO] [stderr] Checking tokio-util v0.6.7 [INFO] [stderr] Checking tokio-stream v0.1.7 [INFO] [stderr] Checking tokio-tungstenite v0.13.0 [INFO] [stderr] Checking h2 v0.3.4 [INFO] [stderr] Checking hyper v0.14.12 [INFO] [stderr] Checking warp v0.3.1 [INFO] [stderr] Checking chessapp v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `rand` is imported redundantly [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rand; [INFO] [stdout] | ^^^^ the item `rand` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `rand` is imported redundantly [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rand; [INFO] [stdout] | ^^^^ the item `rand` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/main.rs:93:33 [INFO] [stdout] | [INFO] [stdout] 93 | ... drop(sinks); [INFO] [stdout] | ^^^^^-----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut HashMap>` [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/main.rs:93:33 [INFO] [stdout] | [INFO] [stdout] 93 | ... drop(sinks); [INFO] [stdout] | ^^^^^-----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut HashMap>` [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.84s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: buf_redux v0.8.4, multipart v0.17.1 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3` [INFO] running `Command { std: "docker" "inspect" "9a72a6e696c27c908efe0815c650db72f171da8408d56c2b7056300a153c820b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9a72a6e696c27c908efe0815c650db72f171da8408d56c2b7056300a153c820b", kill_on_drop: false }` [INFO] [stdout] 9a72a6e696c27c908efe0815c650db72f171da8408d56c2b7056300a153c820b [INFO] checking Osrepnay/chessapp against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsrepnay%2Fchessapp" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Osrepnay/chessapp on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Osrepnay/chessapp [INFO] finished tweaking git repo https://github.com/Osrepnay/chessapp [INFO] tweaked toml for git repo https://github.com/Osrepnay/chessapp written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/Osrepnay/chessapp 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c5b4d518e07fe522d238e92503b0f87ec945a0c1a69adc0c05d7f0ef32709be8 [INFO] running `Command { std: "docker" "start" "-a" "c5b4d518e07fe522d238e92503b0f87ec945a0c1a69adc0c05d7f0ef32709be8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c5b4d518e07fe522d238e92503b0f87ec945a0c1a69adc0c05d7f0ef32709be8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c5b4d518e07fe522d238e92503b0f87ec945a0c1a69adc0c05d7f0ef32709be8", kill_on_drop: false }` [INFO] [stdout] c5b4d518e07fe522d238e92503b0f87ec945a0c1a69adc0c05d7f0ef32709be8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c196dcf89e4cbc1351031a2ad3fff1f6d2ed08a6d16fd094fd2a4da149dea041 [INFO] running `Command { std: "docker" "start" "-a" "c196dcf89e4cbc1351031a2ad3fff1f6d2ed08a6d16fd094fd2a4da149dea041", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.101 [INFO] [stderr] Compiling syn v1.0.75 [INFO] [stderr] Compiling futures-core v0.3.16 [INFO] [stderr] Checking instant v0.1.10 [INFO] [stderr] Compiling futures-macro v0.3.16 [INFO] [stderr] Checking futures-sink v0.3.16 [INFO] [stderr] Compiling futures-task v0.3.16 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Compiling proc-macro-nested v0.1.7 [INFO] [stderr] Compiling futures-channel v0.3.16 [INFO] [stderr] Checking smallvec v1.6.1 [INFO] [stderr] Checking http v0.2.4 [INFO] [stderr] Checking typenum v1.13.0 [INFO] [stderr] Compiling futures-util v0.3.16 [INFO] [stderr] Compiling tokio v1.10.1 [INFO] [stderr] Compiling unicase v2.6.0 [INFO] [stderr] Checking futures-io v0.3.16 [INFO] [stderr] Checking tinyvec v1.3.1 [INFO] [stderr] Compiling indexmap v1.7.0 [INFO] [stderr] Compiling serde v1.0.129 [INFO] [stderr] Checking unicode-bidi v0.3.6 [INFO] [stderr] Checking tracing-core v0.1.19 [INFO] [stderr] Checking input_buffer v0.4.0 [INFO] [stderr] Checking safemem v0.3.3 [INFO] [stderr] Checking want v0.3.0 [INFO] [stderr] Checking buf_redux v0.8.4 [INFO] [stderr] Checking twoway v0.1.8 [INFO] [stderr] Checking generic-array v0.14.4 [INFO] [stderr] Checking scoped-tls v1.0.0 [INFO] [stderr] Checking tracing v0.1.26 [INFO] [stderr] Compiling mime_guess v2.0.3 [INFO] [stderr] Checking getrandom v0.2.3 [INFO] [stderr] Checking parking_lot_core v0.8.5 [INFO] [stderr] Checking signal-hook-registry v1.4.0 [INFO] [stderr] Checking mio v0.7.13 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking getrandom v0.1.16 [INFO] [stderr] Checking socket2 v0.4.1 [INFO] [stderr] Checking time v0.1.43 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_core v0.6.3 [INFO] [stderr] Checking parking_lot v0.11.2 [INFO] [stderr] Checking unicode-normalization v0.1.19 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking block-buffer v0.9.0 [INFO] [stderr] Checking digest v0.9.0 [INFO] [stderr] Checking sha-1 v0.9.8 [INFO] [stderr] Checking rand v0.8.4 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking headers-core v0.2.0 [INFO] [stderr] Checking http-body v0.4.3 [INFO] [stderr] Checking tempfile v3.2.0 [INFO] [stderr] Checking headers v0.3.4 [INFO] [stderr] Checking idna v0.2.3 [INFO] [stderr] Checking multipart v0.17.1 [INFO] [stderr] Checking url v2.2.2 [INFO] [stderr] Checking tungstenite v0.12.0 [INFO] [stderr] Checking serde_json v1.0.66 [INFO] [stderr] Checking serde_urlencoded v0.7.0 [INFO] [stderr] Compiling tokio-macros v1.3.0 [INFO] [stderr] Compiling pin-project-internal v1.0.8 [INFO] [stderr] Checking pin-project v1.0.8 [INFO] [stderr] Checking futures-executor v0.3.16 [INFO] [stderr] Checking futures v0.3.16 [INFO] [stderr] Checking tokio-util v0.6.7 [INFO] [stderr] Checking tokio-stream v0.1.7 [INFO] [stderr] Checking tokio-tungstenite v0.13.0 [INFO] [stderr] Checking h2 v0.3.4 [INFO] [stderr] Checking hyper v0.14.12 [INFO] [stderr] Checking warp v0.3.1 [INFO] [stderr] Checking chessapp v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `rand` is imported redundantly [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rand; [INFO] [stdout] | ^^^^ the item `rand` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `rand` is imported redundantly [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rand; [INFO] [stdout] | ^^^^ the item `rand` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/main.rs:93:33 [INFO] [stdout] | [INFO] [stdout] 93 | ... drop(sinks); [INFO] [stdout] | ^^^^^-----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut HashMap>` [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/main.rs:93:33 [INFO] [stdout] | [INFO] [stdout] 93 | ... drop(sinks); [INFO] [stdout] | ^^^^^-----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut HashMap>` [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.20s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: buf_redux v0.8.4, multipart v0.17.1 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] running `Command { std: "docker" "inspect" "c196dcf89e4cbc1351031a2ad3fff1f6d2ed08a6d16fd094fd2a4da149dea041", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c196dcf89e4cbc1351031a2ad3fff1f6d2ed08a6d16fd094fd2a4da149dea041", kill_on_drop: false }` [INFO] [stdout] c196dcf89e4cbc1351031a2ad3fff1f6d2ed08a6d16fd094fd2a4da149dea041