[INFO] cloning repository https://github.com/Volfy/flashcard [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Volfy/flashcard" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVolfy%2Fflashcard", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVolfy%2Fflashcard'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] aece28f51fcdcf93d3d5a519d4de0e2bd2c75763 [INFO] checking Volfy/flashcard against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVolfy%2Fflashcard" "/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/Volfy/flashcard 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/Volfy/flashcard [INFO] finished tweaking git repo https://github.com/Volfy/flashcard [INFO] tweaked toml for git repo https://github.com/Volfy/flashcard written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/Volfy/flashcard 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] 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] bc75729cbe42eac9a34ad1a538dccdce669010450d3b2121fe5e8fac40e64a0d [INFO] running `Command { std: "docker" "start" "-a" "bc75729cbe42eac9a34ad1a538dccdce669010450d3b2121fe5e8fac40e64a0d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "bc75729cbe42eac9a34ad1a538dccdce669010450d3b2121fe5e8fac40e64a0d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bc75729cbe42eac9a34ad1a538dccdce669010450d3b2121fe5e8fac40e64a0d", kill_on_drop: false }` [INFO] [stdout] bc75729cbe42eac9a34ad1a538dccdce669010450d3b2121fe5e8fac40e64a0d [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] a525ad18102a5e5d16b822fae938c74758d797f4b9f5f9135afaf2ed12af21e3 [INFO] running `Command { std: "docker" "start" "-a" "a525ad18102a5e5d16b822fae938c74758d797f4b9f5f9135afaf2ed12af21e3", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.69 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling serde v1.0.106 [INFO] [stderr] Compiling ryu v1.0.3 [INFO] [stderr] Checking ppv-lite86 v0.2.6 [INFO] [stderr] Checking itoa v0.4.5 [INFO] [stderr] Checking csv-core v0.1.10 [INFO] [stderr] Checking regex-automata v0.1.9 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking bstr v0.2.12 [INFO] [stderr] Checking csv v1.1.3 [INFO] [stderr] Checking flashcard v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `csv` is imported redundantly [INFO] [stdout] --> src/main.rs:23:11 [INFO] [stdout] | [INFO] [stdout] 23 | use csv::{self, Reader}; [INFO] [stdout] | ^^^^ the item `csv` 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 `csv` is imported redundantly [INFO] [stdout] --> src/main.rs:23:11 [INFO] [stdout] | [INFO] [stdout] 23 | use csv::{self, Reader}; [INFO] [stdout] | ^^^^ the item `csv` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `String::split_off` that must be used [INFO] [stdout] --> src/main.rs:139:5 [INFO] [stdout] | [INFO] [stdout] 139 | input.split_off(input.len() -1); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: use `.truncate()` if you don't need the other half [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 139 | let _ = input.split_off(input.len() -1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `String::split_off` that must be used [INFO] [stdout] --> src/main.rs:139:5 [INFO] [stdout] | [INFO] [stdout] 139 | input.split_off(input.len() -1); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: use `.truncate()` if you don't need the other half [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 139 | let _ = input.split_off(input.len() -1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.85s [INFO] running `Command { std: "docker" "inspect" "a525ad18102a5e5d16b822fae938c74758d797f4b9f5f9135afaf2ed12af21e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a525ad18102a5e5d16b822fae938c74758d797f4b9f5f9135afaf2ed12af21e3", kill_on_drop: false }` [INFO] [stdout] a525ad18102a5e5d16b822fae938c74758d797f4b9f5f9135afaf2ed12af21e3 [INFO] checking Volfy/flashcard against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVolfy%2Fflashcard" "/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/Volfy/flashcard 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/Volfy/flashcard [INFO] finished tweaking git repo https://github.com/Volfy/flashcard [INFO] tweaked toml for git repo https://github.com/Volfy/flashcard written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/Volfy/flashcard 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] e33408ed1cf075ec70aaa690a29f13c2a10625ba966cea25ce937c1c007b7933 [INFO] running `Command { std: "docker" "start" "-a" "e33408ed1cf075ec70aaa690a29f13c2a10625ba966cea25ce937c1c007b7933", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e33408ed1cf075ec70aaa690a29f13c2a10625ba966cea25ce937c1c007b7933", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e33408ed1cf075ec70aaa690a29f13c2a10625ba966cea25ce937c1c007b7933", kill_on_drop: false }` [INFO] [stdout] e33408ed1cf075ec70aaa690a29f13c2a10625ba966cea25ce937c1c007b7933 [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] 09f140353170a4cf260c8c2b37588f953603b5f77f735a9abe8b842697020c4a [INFO] running `Command { std: "docker" "start" "-a" "09f140353170a4cf260c8c2b37588f953603b5f77f735a9abe8b842697020c4a", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.69 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling serde v1.0.106 [INFO] [stderr] Compiling ryu v1.0.3 [INFO] [stderr] Checking ppv-lite86 v0.2.6 [INFO] [stderr] Checking itoa v0.4.5 [INFO] [stderr] Checking csv-core v0.1.10 [INFO] [stderr] Checking regex-automata v0.1.9 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking bstr v0.2.12 [INFO] [stderr] Checking csv v1.1.3 [INFO] [stderr] Checking flashcard v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `csv` is imported redundantly [INFO] [stdout] --> src/main.rs:23:11 [INFO] [stdout] | [INFO] [stdout] 23 | use csv::{self, Reader}; [INFO] [stdout] | ^^^^ the item `csv` 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 `csv` is imported redundantly [INFO] [stdout] --> src/main.rs:23:11 [INFO] [stdout] | [INFO] [stdout] 23 | use csv::{self, Reader}; [INFO] [stdout] | ^^^^ the item `csv` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `String::split_off` that must be used [INFO] [stdout] --> src/main.rs:139:5 [INFO] [stdout] | [INFO] [stdout] 139 | input.split_off(input.len() -1); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: use `.truncate()` if you don't need the other half [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 139 | let _ = input.split_off(input.len() -1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `String::split_off` that must be used [INFO] [stdout] --> src/main.rs:139:5 [INFO] [stdout] | [INFO] [stdout] 139 | input.split_off(input.len() -1); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: use `.truncate()` if you don't need the other half [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 139 | let _ = input.split_off(input.len() -1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.23s [INFO] running `Command { std: "docker" "inspect" "09f140353170a4cf260c8c2b37588f953603b5f77f735a9abe8b842697020c4a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "09f140353170a4cf260c8c2b37588f953603b5f77f735a9abe8b842697020c4a", kill_on_drop: false }` [INFO] [stdout] 09f140353170a4cf260c8c2b37588f953603b5f77f735a9abe8b842697020c4a