[INFO] fetching crate xtp 0.1.0-alpha.4...
[INFO] testing xtp-0.1.0-alpha.4 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate xtp 0.1.0-alpha.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate xtp 0.1.0-alpha.4 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xtp 0.1.0-alpha.4
[INFO] finished tweaking crates.io crate xtp 0.1.0-alpha.4
[INFO] tweaked toml for crates.io crate xtp 0.1.0-alpha.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate xtp 0.1.0-alpha.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded which v3.1.0
[INFO] [stderr]   Downloaded structopt-derive v0.3.3
[INFO] [stderr]   Downloaded structopt v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 587d8d8574c7cef8c10db63d5f0ad5ba0d2dc57cd33603a8114384623e0d3028
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "587d8d8574c7cef8c10db63d5f0ad5ba0d2dc57cd33603a8114384623e0d3028", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "587d8d8574c7cef8c10db63d5f0ad5ba0d2dc57cd33603a8114384623e0d3028", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "587d8d8574c7cef8c10db63d5f0ad5ba0d2dc57cd33603a8114384623e0d3028", kill_on_drop: false }`
[INFO] [stdout] 587d8d8574c7cef8c10db63d5f0ad5ba0d2dc57cd33603a8114384623e0d3028
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9c63fd777642be1fc6c712db12c90d27b115329ad8d839142069c853f0f34ee
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e9c63fd777642be1fc6c712db12c90d27b115329ad8d839142069c853f0f34ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling bindgen v0.52.0
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling rustc-hash v1.0.1
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling which v3.1.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling synstructure v0.12.2
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling xtp v0.1.0-alpha.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0464]: multiple matching crates for `std`
[INFO] [stdout]   |
[INFO] [stdout]   = note: candidates:
[INFO] [stdout]           crate `std`: /opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-3532beb752f910d7.rlib
[INFO] [stdout]           crate `std`: /opt/rustwide/target/debug/libstd.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xtp`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e9c63fd777642be1fc6c712db12c90d27b115329ad8d839142069c853f0f34ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9c63fd777642be1fc6c712db12c90d27b115329ad8d839142069c853f0f34ee", kill_on_drop: false }`
[INFO] [stdout] e9c63fd777642be1fc6c712db12c90d27b115329ad8d839142069c853f0f34ee
