[INFO] cloning repository https://github.com/lukasgeis/negative_edge_weights
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lukasgeis/negative_edge_weights" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukasgeis%2Fnegative_edge_weights", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukasgeis%2Fnegative_edge_weights'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17fe3568c32beb5f28e03c0ca1e2f2c0bc4bbf26
[INFO] testing lukasgeis/negative_edge_weights against 1.95.0 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukasgeis%2Fnegative_edge_weights" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lukasgeis/negative_edge_weights
[INFO] finished tweaking git repo https://github.com/lukasgeis/negative_edge_weights
[INFO] tweaked toml for git repo https://github.com/lukasgeis/negative_edge_weights written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lukasgeis/negative_edge_weights on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "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" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 74 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v3.0.0)
[INFO] [stderr]       Adding ordered-float v4.6.0 (available: v5.3.0)
[INFO] [stderr]       Adding rand v0.8.6 (available: v0.10.1)
[INFO] [stderr]       Adding rand_distr v0.4.3 (available: v0.6.0)
[INFO] [stderr]       Adding rand_pcg v0.3.1 (available: v0.10.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ez-bitset v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05d3d79543de441645240acc9dbff201761a8a0d95dcb968679c1b4a52054111
[INFO] running `Command { std: "docker" "start" "-a" "05d3d79543de441645240acc9dbff201761a8a0d95dcb968679c1b4a52054111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05d3d79543de441645240acc9dbff201761a8a0d95dcb968679c1b4a52054111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05d3d79543de441645240acc9dbff201761a8a0d95dcb968679c1b4a52054111", kill_on_drop: false }`
[INFO] [stdout] 05d3d79543de441645240acc9dbff201761a8a0d95dcb968679c1b4a52054111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73caa86810777c2481e78748f3fd46e08dd6d5e4234b9f7f1bf1f4c264ca676b
[INFO] running `Command { std: "docker" "start" "-a" "73caa86810777c2481e78748f3fd46e08dd6d5e4234b9f7f1bf1f4c264ca676b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling ryu v1.0.23
[INFO] [stderr]    Compiling rayon v1.12.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling rand_pcg v0.3.1
[INFO] [stderr]    Compiling ordered-float v4.6.0
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling ez-bitset v0.1.0
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling array-init v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.6
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling rand_distr v0.4.3
[INFO] [stderr]    Compiling negative_edge_weights v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `negative_edge_weights` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "73caa86810777c2481e78748f3fd46e08dd6d5e4234b9f7f1bf1f4c264ca676b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73caa86810777c2481e78748f3fd46e08dd6d5e4234b9f7f1bf1f4c264ca676b", kill_on_drop: false }`
[INFO] [stdout] 73caa86810777c2481e78748f3fd46e08dd6d5e4234b9f7f1bf1f4c264ca676b
