[INFO] cloning repository https://github.com/jos-b/cpu_emulator [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jos-b/cpu_emulator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjos-b%2Fcpu_emulator", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjos-b%2Fcpu_emulator'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a11b6d3a9d0cb22dbe8e18506bf96c140a905f12 [INFO] checking jos-b/cpu_emulator against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjos-b%2Fcpu_emulator" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jos-b/cpu_emulator 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/jos-b/cpu_emulator [INFO] finished tweaking git repo https://github.com/jos-b/cpu_emulator [INFO] tweaked toml for git repo https://github.com/jos-b/cpu_emulator written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/jos-b/cpu_emulator 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 regex v0.2.10 [INFO] [stderr] Downloaded regex-syntax v0.5.5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e46dd0fc38f2e352ec29fbdfe1e89973dc667927a7d3ce9176eaad762cbb6a9f [INFO] running `Command { std: "docker" "start" "-a" "e46dd0fc38f2e352ec29fbdfe1e89973dc667927a7d3ce9176eaad762cbb6a9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e46dd0fc38f2e352ec29fbdfe1e89973dc667927a7d3ce9176eaad762cbb6a9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e46dd0fc38f2e352ec29fbdfe1e89973dc667927a7d3ce9176eaad762cbb6a9f", kill_on_drop: false }` [INFO] [stdout] e46dd0fc38f2e352ec29fbdfe1e89973dc667927a7d3ce9176eaad762cbb6a9f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b8bc654938aeef741e4b4d2f12b279df47209e4811ea26da3b204a63b0cd7adf [INFO] running `Command { std: "docker" "start" "-a" "b8bc654938aeef741e4b4d2f12b279df47209e4811ea26da3b204a63b0cd7adf", kill_on_drop: false }` [INFO] [stderr] Checking libc v0.2.40 [INFO] [stderr] Checking ucd-util v0.1.1 [INFO] [stderr] Compiling regex v0.2.10 [INFO] [stderr] Checking lazy_static v1.0.0 [INFO] [stderr] Checking thread_local v0.3.5 [INFO] [stderr] Checking regex-syntax v0.5.5 [INFO] [stderr] Checking memchr v2.0.1 [INFO] [stderr] Checking aho-corasick v0.6.4 [INFO] [stderr] Checking cpu_emulator v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/tokenizer.rs:125:5 [INFO] [stdout] | [INFO] [stdout] 125 | (codes) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 125 - (codes) [INFO] [stdout] 125 + codes [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/tokenizer.rs:125:5 [INFO] [stdout] | [INFO] [stdout] 125 | (codes) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 125 - (codes) [INFO] [stdout] 125 + codes [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.04s [INFO] running `Command { std: "docker" "inspect" "b8bc654938aeef741e4b4d2f12b279df47209e4811ea26da3b204a63b0cd7adf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b8bc654938aeef741e4b4d2f12b279df47209e4811ea26da3b204a63b0cd7adf", kill_on_drop: false }` [INFO] [stdout] b8bc654938aeef741e4b4d2f12b279df47209e4811ea26da3b204a63b0cd7adf [INFO] checking jos-b/cpu_emulator against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjos-b%2Fcpu_emulator" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jos-b/cpu_emulator on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jos-b/cpu_emulator [INFO] finished tweaking git repo https://github.com/jos-b/cpu_emulator [INFO] tweaked toml for git repo https://github.com/jos-b/cpu_emulator written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/jos-b/cpu_emulator 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 22e2eca64a838a3da1ed0a1a0d817cbfdcbcab466e8025be3c9e1a1082a6f189 [INFO] running `Command { std: "docker" "start" "-a" "22e2eca64a838a3da1ed0a1a0d817cbfdcbcab466e8025be3c9e1a1082a6f189", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "22e2eca64a838a3da1ed0a1a0d817cbfdcbcab466e8025be3c9e1a1082a6f189", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "22e2eca64a838a3da1ed0a1a0d817cbfdcbcab466e8025be3c9e1a1082a6f189", kill_on_drop: false }` [INFO] [stdout] 22e2eca64a838a3da1ed0a1a0d817cbfdcbcab466e8025be3c9e1a1082a6f189 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] af769ef94d1d76c3dd192fa18e63c70585a4e7e48c09fd40374422a7b30acab3 [INFO] running `Command { std: "docker" "start" "-a" "af769ef94d1d76c3dd192fa18e63c70585a4e7e48c09fd40374422a7b30acab3", kill_on_drop: false }` [INFO] [stderr] Checking libc v0.2.40 [INFO] [stderr] Compiling regex v0.2.10 [INFO] [stderr] Checking lazy_static v1.0.0 [INFO] [stderr] Checking ucd-util v0.1.1 [INFO] [stderr] Checking thread_local v0.3.5 [INFO] [stderr] Checking regex-syntax v0.5.5 [INFO] [stderr] Checking memchr v2.0.1 [INFO] [stderr] Checking aho-corasick v0.6.4 [INFO] [stderr] Checking cpu_emulator v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/tokenizer.rs:125:5 [INFO] [stdout] | [INFO] [stdout] 125 | (codes) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 125 - (codes) [INFO] [stdout] 125 + codes [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/tokenizer.rs:125:5 [INFO] [stdout] | [INFO] [stdout] 125 | (codes) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 125 - (codes) [INFO] [stdout] 125 + codes [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.81s [INFO] running `Command { std: "docker" "inspect" "af769ef94d1d76c3dd192fa18e63c70585a4e7e48c09fd40374422a7b30acab3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "af769ef94d1d76c3dd192fa18e63c70585a4e7e48c09fd40374422a7b30acab3", kill_on_drop: false }` [INFO] [stdout] af769ef94d1d76c3dd192fa18e63c70585a4e7e48c09fd40374422a7b30acab3