[INFO] fetching crate panic-rtt-target 0.2.0...
[INFO] building panic-rtt-target-0.2.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate panic-rtt-target 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate panic-rtt-target 0.2.0
[INFO] finished tweaking crates.io crate panic-rtt-target 0.2.0
[INFO] tweaked toml for crates.io crate panic-rtt-target 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate panic-rtt-target 0.2.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate panic-rtt-target 0.2.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48156ffbc096742739885ccd8bb9e7004c92783afb0b190cba2eab87b367b4b5
[INFO] running `Command { std: "docker" "start" "-a" "48156ffbc096742739885ccd8bb9e7004c92783afb0b190cba2eab87b367b4b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48156ffbc096742739885ccd8bb9e7004c92783afb0b190cba2eab87b367b4b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48156ffbc096742739885ccd8bb9e7004c92783afb0b190cba2eab87b367b4b5", kill_on_drop: false }`
[INFO] [stdout] 48156ffbc096742739885ccd8bb9e7004c92783afb0b190cba2eab87b367b4b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44093874b421bc06795523df6f8f7bf34e0e8efb58ceee59b3b175e7555e32fd
[INFO] running `Command { std: "docker" "start" "-a" "44093874b421bc06795523df6f8f7bf34e0e8efb58ceee59b3b175e7555e32fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.9.0
[INFO] [stderr]    Compiling ufmt-write v0.1.0
[INFO] [stderr]    Compiling critical-section v1.2.0
[INFO] [stderr]    Compiling rtt-target v0.6.0
[INFO] [stderr]    Compiling panic-rtt-target v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `Command { std: "docker" "inspect" "44093874b421bc06795523df6f8f7bf34e0e8efb58ceee59b3b175e7555e32fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44093874b421bc06795523df6f8f7bf34e0e8efb58ceee59b3b175e7555e32fd", kill_on_drop: false }`
[INFO] [stdout] 44093874b421bc06795523df6f8f7bf34e0e8efb58ceee59b3b175e7555e32fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46dd0f4ae04bce05e7ddad34dd690986788c72fc428e7ce06a3eadfe39b80bdf
[INFO] running `Command { std: "docker" "start" "-a" "46dd0f4ae04bce05e7ddad34dd690986788c72fc428e7ce06a3eadfe39b80bdf", kill_on_drop: false }`
[INFO] [stderr]    Compiling panic-rtt-target v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/lib.rs:50:1
[INFO] [stdout]    |
[INFO] [stdout] 50 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stdout] 51 | |     critical_section::with(|_| {
[INFO] [stdout] 52 | |         #[cfg(feature = "defmt")]
[INFO] [stdout] 53 | |         defmt::error!("{}", defmt::Display2Format(info));
[INFO] [stdout] ...  |
[INFO] [stdout] 66 | |     })
[INFO] [stdout] 67 | | }
[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/4987e9d4227139400384ab59296ffee3b0fb1183/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-2bfe6d313f1a27d4.so, /opt/rustwide/rustup-home/toolchains/4987e9d4227139400384ab59296ffee3b0fb1183/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-2bfe6d313f1a27d4.rlib
[INFO] [stdout]    = note: second definition in the local crate (`panic_rtt_target`)
[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-rtt-target` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "46dd0f4ae04bce05e7ddad34dd690986788c72fc428e7ce06a3eadfe39b80bdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46dd0f4ae04bce05e7ddad34dd690986788c72fc428e7ce06a3eadfe39b80bdf", kill_on_drop: false }`
[INFO] [stdout] 46dd0f4ae04bce05e7ddad34dd690986788c72fc428e7ce06a3eadfe39b80bdf