[INFO] fetching crate panic-rtt-target 0.1.3...
[INFO] checking panic-rtt-target-0.1.3 against master#8549802939cd01111c46e34a7b67cb1933977af9 for pr-132712
[INFO] extracting crate panic-rtt-target 0.1.3 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate panic-rtt-target 0.1.3 on toolchain 8549802939cd01111c46e34a7b67cb1933977af9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate panic-rtt-target 0.1.3
[INFO] finished tweaking crates.io crate panic-rtt-target 0.1.3
[INFO] tweaked toml for crates.io crate panic-rtt-target 0.1.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rtt-target v0.5.0
[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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef1093a9af8beed97a2d2d0dedfa345212734e3b97ed205f9165042d237dcd0d
[INFO] running `Command { std: "docker" "start" "-a" "ef1093a9af8beed97a2d2d0dedfa345212734e3b97ed205f9165042d237dcd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef1093a9af8beed97a2d2d0dedfa345212734e3b97ed205f9165042d237dcd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef1093a9af8beed97a2d2d0dedfa345212734e3b97ed205f9165042d237dcd0d", kill_on_drop: false }`
[INFO] [stdout] ef1093a9af8beed97a2d2d0dedfa345212734e3b97ed205f9165042d237dcd0d
[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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f981cf32be1cd83a4b179e298d9577017176c20c7927a27a26002d6ff83c5fa
[INFO] running `Command { std: "docker" "start" "-a" "1f981cf32be1cd83a4b179e298d9577017176c20c7927a27a26002d6ff83c5fa", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Checking rtt-target v0.5.0
[INFO] [stderr]     Checking panic-rtt-target v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/lib.rs:55:1
[INFO] [stdout]    |
[INFO] [stdout] 55 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stdout] 56 | |     critical_section::with(|_| {
[INFO] [stdout] 57 | |         if let Some(mut channel) = unsafe { UpChannel::conjure(0) } {
[INFO] [stdout] 58 | |             channel.set_mode(ChannelMode::BlockIfFull);
[INFO] [stdout] ...  |
[INFO] [stdout] 72 | |     })
[INFO] [stdout] 73 | | }
[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/8549802939cd01111c46e34a7b67cb1933977af9/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-211931512faabf29.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" "1f981cf32be1cd83a4b179e298d9577017176c20c7927a27a26002d6ff83c5fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f981cf32be1cd83a4b179e298d9577017176c20c7927a27a26002d6ff83c5fa", kill_on_drop: false }`
[INFO] [stdout] 1f981cf32be1cd83a4b179e298d9577017176c20c7927a27a26002d6ff83c5fa