[INFO] fetching crate panic-never 0.1.0...
[INFO] testing panic-never-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate panic-never 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate panic-never 0.1.0
[INFO] finished tweaking crates.io crate panic-never 0.1.0
[INFO] tweaked toml for crates.io crate panic-never 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate panic-never 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bccc5448363bcbf108cc9822b01aae4a74953f5c86d23f57f0384e4b9419e2f7
[INFO] running `Command { std: "docker" "start" "-a" "bccc5448363bcbf108cc9822b01aae4a74953f5c86d23f57f0384e4b9419e2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bccc5448363bcbf108cc9822b01aae4a74953f5c86d23f57f0384e4b9419e2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bccc5448363bcbf108cc9822b01aae4a74953f5c86d23f57f0384e4b9419e2f7", kill_on_drop: false }`
[INFO] [stdout] bccc5448363bcbf108cc9822b01aae4a74953f5c86d23f57f0384e4b9419e2f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12a543d91fcbfd7117b1b6e3310a16795fd1470acd998bc145de933043efc7b2
[INFO] running `Command { std: "docker" "start" "-a" "12a543d91fcbfd7117b1b6e3310a16795fd1470acd998bc145de933043efc7b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling panic-never v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "12a543d91fcbfd7117b1b6e3310a16795fd1470acd998bc145de933043efc7b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12a543d91fcbfd7117b1b6e3310a16795fd1470acd998bc145de933043efc7b2", kill_on_drop: false }`
[INFO] [stdout] 12a543d91fcbfd7117b1b6e3310a16795fd1470acd998bc145de933043efc7b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16857d537e9b7e28aea262fb18ff1e8ed7a14ebafa2b1e8af211cc1d4acd402c
[INFO] running `Command { std: "docker" "start" "-a" "16857d537e9b7e28aea262fb18ff1e8ed7a14ebafa2b1e8af211cc1d4acd402c", kill_on_drop: false }`
[INFO] [stderr]    Compiling panic-never v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | / fn panic(_: &PanicInfo<'_>) -> ! {
[INFO] [stdout] 49 | |     extern "Rust" {
[INFO] [stdout] 50 | |         #[link_name = "\nerror(panic-never): your program contains at least one panicking branch"]
[INFO] [stdout] 51 | |         fn undefined() -> !;
[INFO] [stdout] ...  |
[INFO] [stdout] 54 | |     unsafe { undefined() }
[INFO] [stdout] 55 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/1.90.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-210854cf1daa4bec.so, /opt/rustwide/rustup-home/toolchains/1.90.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-210854cf1daa4bec.rlib
[INFO] [stdout]    = note: second definition in the local crate (`panic_never`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `panic-never` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "16857d537e9b7e28aea262fb18ff1e8ed7a14ebafa2b1e8af211cc1d4acd402c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16857d537e9b7e28aea262fb18ff1e8ed7a14ebafa2b1e8af211cc1d4acd402c", kill_on_drop: false }`
[INFO] [stdout] 16857d537e9b7e28aea262fb18ff1e8ed7a14ebafa2b1e8af211cc1d4acd402c