[INFO] cloning repository https://github.com/vbartu/demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vbartu/demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbartu%2Fdemos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbartu%2Fdemos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17ae99a605f564685950d96ab260aad810d8480b
[INFO] checking vbartu/demos against master#d93f678fa55842cccd2f091deccd93e9494b3764 for pr-138844
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbartu%2Fdemos" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vbartu/demos on toolchain d93f678fa55842cccd2f091deccd93e9494b3764
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/vbartu/demos
[INFO] finished tweaking git repo https://github.com/vbartu/demos
[INFO] tweaked toml for git repo https://github.com/vbartu/demos written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/vbartu/demos 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" "+d93f678fa55842cccd2f091deccd93e9494b3764" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0901b7778bea1d68822a9aa99a90f0744ceff4b4ec5d25b548f6946edd06f198
[INFO] running `Command { std: "docker" "start" "-a" "0901b7778bea1d68822a9aa99a90f0744ceff4b4ec5d25b548f6946edd06f198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0901b7778bea1d68822a9aa99a90f0744ceff4b4ec5d25b548f6946edd06f198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0901b7778bea1d68822a9aa99a90f0744ceff4b4ec5d25b548f6946edd06f198", kill_on_drop: false }`
[INFO] [stdout] 0901b7778bea1d68822a9aa99a90f0744ceff4b4ec5d25b548f6946edd06f198
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9268225c654e914c43257892ac5608a139dda5f6c7438e4c2f35e44565cc0c1
[INFO] running `Command { std: "docker" "start" "-a" "a9268225c654e914c43257892ac5608a139dda5f6c7438e4c2f35e44565cc0c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | / fn panic(_info: &core::panic::PanicInfo) -> ! {
[INFO] [stdout] 6 | |     loop {}
[INFO] [stdout] 7 | | }
[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/d93f678fa55842cccd2f091deccd93e9494b3764/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-168b2af3cdbd9a8b.rlib
[INFO] [stdout]   = note: second definition in the local crate (`demos`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `demos` (bin "demos" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `demos` (bin "demos") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a9268225c654e914c43257892ac5608a139dda5f6c7438e4c2f35e44565cc0c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9268225c654e914c43257892ac5608a139dda5f6c7438e4c2f35e44565cc0c1", kill_on_drop: false }`
[INFO] [stdout] a9268225c654e914c43257892ac5608a139dda5f6c7438e4c2f35e44565cc0c1