[INFO] fetching crate panic-custom 0.1.1...
[INFO] testing panic-custom-0.1.1 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate panic-custom 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate panic-custom 0.1.1
[INFO] finished tweaking crates.io crate panic-custom 0.1.1
[INFO] tweaked toml for crates.io crate panic-custom 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate panic-custom 0.1.1 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panic-custom-proc-macros v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] feab10dddfb7e4cec4ea79c4405689b8cbb9361d966dde5a90652723c170c0f5
[INFO] running `Command { std: "docker" "start" "-a" "feab10dddfb7e4cec4ea79c4405689b8cbb9361d966dde5a90652723c170c0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "feab10dddfb7e4cec4ea79c4405689b8cbb9361d966dde5a90652723c170c0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feab10dddfb7e4cec4ea79c4405689b8cbb9361d966dde5a90652723c170c0f5", kill_on_drop: false }`
[INFO] [stdout] feab10dddfb7e4cec4ea79c4405689b8cbb9361d966dde5a90652723c170c0f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 8500ef15b053e15bd3a954192d39558cfa1b63d71818a71b44f45c084f203154
[INFO] running `Command { std: "docker" "start" "-a" "8500ef15b053e15bd3a954192d39558cfa1b63d71818a71b44f45c084f203154", kill_on_drop: false }`
[INFO] [stderr]    Compiling panic-custom v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "8500ef15b053e15bd3a954192d39558cfa1b63d71818a71b44f45c084f203154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8500ef15b053e15bd3a954192d39558cfa1b63d71818a71b44f45c084f203154", kill_on_drop: false }`
[INFO] [stdout] 8500ef15b053e15bd3a954192d39558cfa1b63d71818a71b44f45c084f203154
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 1a4c13c05ec0fdab2cf953c8dedd34b04642660ad11ead1bdd17f4047996daf5
[INFO] running `Command { std: "docker" "start" "-a" "1a4c13c05ec0fdab2cf953c8dedd34b04642660ad11ead1bdd17f4047996daf5", kill_on_drop: false }`
[INFO] [stderr]    Compiling panic-custom v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]    --> src/lib.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 | /             fn panic(info: &core::panic::PanicInfo) -> ! {
[INFO] [stdout] 126 | |                 // Custom defined function
[INFO] [stdout] 127 | |                 unsafe { $panic_fn(info); }
[INFO] [stdout] ...   |
[INFO] [stdout] 130 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 180 | /     define_panic!(|_| {
[INFO] [stdout] 181 | |         loop {}
[INFO] [stdout] 182 | |     });
[INFO] [stdout]     | |______- in this macro invocation
[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/8de4c7234dd9b97c9d76b58671343fdbbc9a433e/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-6552f92f1a5eadae.so, /opt/rustwide/rustup-home/toolchains/8de4c7234dd9b97c9d76b58671343fdbbc9a433e/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-6552f92f1a5eadae.rlib
[INFO] [stdout]     = note: second definition in the local crate (`panic_custom`)
[INFO] [stdout]     = note: this error originates in the macro `define_panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[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-custom` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1a4c13c05ec0fdab2cf953c8dedd34b04642660ad11ead1bdd17f4047996daf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a4c13c05ec0fdab2cf953c8dedd34b04642660ad11ead1bdd17f4047996daf5", kill_on_drop: false }`
[INFO] [stdout] 1a4c13c05ec0fdab2cf953c8dedd34b04642660ad11ead1bdd17f4047996daf5