[INFO] cloning repository https://github.com/EmberHext/QR-Code-Generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EmberHext/QR-Code-Generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmberHext%2FQR-Code-Generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmberHext%2FQR-Code-Generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 964ad1c48e8035e7df4bd36194db52c7c39cc8ff
[INFO] checking EmberHext/QR-Code-Generator against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmberHext%2FQR-Code-Generator" "/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/EmberHext/QR-Code-Generator 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/EmberHext/QR-Code-Generator
[INFO] finished tweaking git repo https://github.com/EmberHext/QR-Code-Generator
[INFO] tweaked toml for git repo https://github.com/EmberHext/QR-Code-Generator written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/EmberHext/QR-Code-Generator 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-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] 7b41975e0d3b5309f99d97f4ba0d08256fa9a8f65966f8383d9910924c21cce5
[INFO] running `Command { std: "docker" "start" "-a" "7b41975e0d3b5309f99d97f4ba0d08256fa9a8f65966f8383d9910924c21cce5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b41975e0d3b5309f99d97f4ba0d08256fa9a8f65966f8383d9910924c21cce5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b41975e0d3b5309f99d97f4ba0d08256fa9a8f65966f8383d9910924c21cce5", kill_on_drop: false }`
[INFO] [stdout] 7b41975e0d3b5309f99d97f4ba0d08256fa9a8f65966f8383d9910924c21cce5
[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] 497b9d7259097c40796ed2818979766bac98a63bc92b549816506b8547f7080a
[INFO] running `Command { std: "docker" "start" "-a" "497b9d7259097c40796ed2818979766bac98a63bc92b549816506b8547f7080a", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking regex v1.7.3
[INFO] [stderr]     Checking qr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `M`, `Q`, and `H` are never constructed
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum ErrorCorrectionLevel {
[INFO] [stdout]    |      -------------------- variants in this enum
[INFO] [stdout] 25 |     L,
[INFO] [stdout] 26 |     M,
[INFO] [stdout]    |     ^
[INFO] [stdout] 27 |     Q,
[INFO] [stdout]    |     ^
[INFO] [stdout] 28 |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorCorrectionLevel` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `M`, `Q`, and `H` are never constructed
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum ErrorCorrectionLevel {
[INFO] [stdout]    |      -------------------- variants in this enum
[INFO] [stdout] 25 |     L,
[INFO] [stdout] 26 |     M,
[INFO] [stdout]    |     ^
[INFO] [stdout] 27 |     Q,
[INFO] [stdout]    |     ^
[INFO] [stdout] 28 |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorCorrectionLevel` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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 3.23s
[INFO] running `Command { std: "docker" "inspect" "497b9d7259097c40796ed2818979766bac98a63bc92b549816506b8547f7080a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "497b9d7259097c40796ed2818979766bac98a63bc92b549816506b8547f7080a", kill_on_drop: false }`
[INFO] [stdout] 497b9d7259097c40796ed2818979766bac98a63bc92b549816506b8547f7080a
[INFO] checking EmberHext/QR-Code-Generator against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmberHext%2FQR-Code-Generator" "/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/EmberHext/QR-Code-Generator 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/EmberHext/QR-Code-Generator
[INFO] finished tweaking git repo https://github.com/EmberHext/QR-Code-Generator
[INFO] tweaked toml for git repo https://github.com/EmberHext/QR-Code-Generator written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/EmberHext/QR-Code-Generator 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-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25d54e2632bbe3329df959434dc6e6cf34a9a334732f9cef0ad6e51150973d0c
[INFO] running `Command { std: "docker" "start" "-a" "25d54e2632bbe3329df959434dc6e6cf34a9a334732f9cef0ad6e51150973d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25d54e2632bbe3329df959434dc6e6cf34a9a334732f9cef0ad6e51150973d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25d54e2632bbe3329df959434dc6e6cf34a9a334732f9cef0ad6e51150973d0c", kill_on_drop: false }`
[INFO] [stdout] 25d54e2632bbe3329df959434dc6e6cf34a9a334732f9cef0ad6e51150973d0c
[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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e70bd9831b4598f17ff86a64f01c2fdda5290a0ffc0ab34d3137dff867eae686
[INFO] running `Command { std: "docker" "start" "-a" "e70bd9831b4598f17ff86a64f01c2fdda5290a0ffc0ab34d3137dff867eae686", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.3
[INFO] [stderr]     Checking qr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `M`, `Q`, and `H` are never constructed
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum ErrorCorrectionLevel {
[INFO] [stdout]    |      -------------------- variants in this enum
[INFO] [stdout] 25 |     L,
[INFO] [stdout] 26 |     M,
[INFO] [stdout]    |     ^
[INFO] [stdout] 27 |     Q,
[INFO] [stdout]    |     ^
[INFO] [stdout] 28 |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorCorrectionLevel` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `M`, `Q`, and `H` are never constructed
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum ErrorCorrectionLevel {
[INFO] [stdout]    |      -------------------- variants in this enum
[INFO] [stdout] 25 |     L,
[INFO] [stdout] 26 |     M,
[INFO] [stdout]    |     ^
[INFO] [stdout] 27 |     Q,
[INFO] [stdout]    |     ^
[INFO] [stdout] 28 |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorCorrectionLevel` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.95s
[INFO] running `Command { std: "docker" "inspect" "e70bd9831b4598f17ff86a64f01c2fdda5290a0ffc0ab34d3137dff867eae686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e70bd9831b4598f17ff86a64f01c2fdda5290a0ffc0ab34d3137dff867eae686", kill_on_drop: false }`
[INFO] [stdout] e70bd9831b4598f17ff86a64f01c2fdda5290a0ffc0ab34d3137dff867eae686