[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 1.99.0-beta.1+cargoflags=--release for beta-release-1.99-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukasgeis%2Fnegative_edge_weights" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/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-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lukasgeis/negative_edge_weights on toolchain 1.99.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.1" "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" "+1.99.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 75 packages to highest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v3.0.0)
[INFO] [stderr]       Adding ordered-float v4.6.0 (available: v5.5.0)
[INFO] [stderr]       Adding rand v0.8.8 (available: v0.10.2)
[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" "+1.99.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688
[INFO] running `Command { std: "docker" "start" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.5.1
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling libc v0.2.189
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling crossbeam-utils v0.8.22
[INFO] [stderr]    Compiling serde_core v1.0.229
[INFO] [stderr]    Compiling zerocopy v0.8.56
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.20
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.7
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling memchr v2.8.3
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.13.3
[INFO] [stderr]    Compiling zmij v1.0.23
[INFO] [stderr]    Compiling serde v1.0.229
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling wyz v0.5.1
[INFO] [stderr]    Compiling serde_json v1.0.151
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling either v1.18.0
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling bitvec v1.1.1
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling array-init v2.1.0
[INFO] [stderr]    Compiling smallvec v1.16.0
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling syn v3.0.4
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_pcg v0.3.1
[INFO] [stderr]    Compiling rayon v1.12.0
[INFO] [stderr]    Compiling num-integer v0.1.47
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling ordered-float v4.6.0
[INFO] [stderr]    Compiling num-bigint v0.4.8
[INFO] [stderr]    Compiling num-iter v0.1.46
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.229
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling ez-bitset v0.1.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.8
[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 beta 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" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688", kill_on_drop: false }`
[INFO] [stdout] 373cb15dbf1d1b68905044baaadfd9d81a6734a26d1dd57b44032d58d1595688
