[INFO] cloning repository https://github.com/Kholodets/fractals
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kholodets/fractals" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKholodets%2Ffractals", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKholodets%2Ffractals'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ddae2a27a45b61a94f3c288f0cf3459a39d3efe5
[INFO] testing Kholodets/fractals against master#198328ad7960b1bece0dc48496bff6c62dd5d339 for pr-149852
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKholodets%2Ffractals" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Kholodets/fractals
[INFO] finished tweaking git repo https://github.com/Kholodets/fractals
[INFO] tweaked toml for git repo https://github.com/Kholodets/fractals written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Kholodets/fractals on toolchain 198328ad7960b1bece0dc48496bff6c62dd5d339
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Kholodets/fractals 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" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memoffset v0.6.5
[INFO] [stderr]   Downloaded num-iter v0.1.43
[INFO] [stderr]   Downloaded num-complex v0.4.2
[INFO] [stderr]   Downloaded num-integer v0.1.45
[INFO] [stderr]   Downloaded quote v1.0.21
[INFO] [stderr]   Downloaded phf_shared v0.11.1
[INFO] [stderr]   Downloaded proc-macro2 v1.0.47
[INFO] [stderr]   Downloaded num-rational v0.4.1
[INFO] [stderr]   Downloaded unicode-ident v1.0.5
[INFO] [stderr]   Downloaded phf v0.11.1
[INFO] [stderr]   Downloaded either v1.8.0
[INFO] [stderr]   Downloaded num-traits v0.2.15
[INFO] [stderr]   Downloaded num-bigint v0.4.3
[INFO] [stderr]   Downloaded serde v1.0.147
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.11
[INFO] [stderr]   Downloaded palette v0.6.1
[INFO] [stderr]   Downloaded rayon v1.5.3
[INFO] [stderr]   Downloaded rayon-core v1.9.3
[INFO] [stderr]   Downloaded toml v0.5.9
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.12
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.6
[INFO] [stderr]   Downloaded crossbeam-deque v0.8.2
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded syn v1.0.103
[INFO] [stderr]   Downloaded approx v0.5.1
[INFO] [stderr]   Downloaded find-crate v0.6.3
[INFO] [stderr]   Downloaded palette_derive v0.6.1
[INFO] [stderr]   Downloaded phf_generator v0.11.1
[INFO] [stderr]   Downloaded phf_macros v0.11.1
[INFO] [stderr]   Downloaded siphasher v0.3.10
[INFO] [stderr]   Downloaded num_cpus v1.13.1
[INFO] [stderr]   Downloaded libc v0.2.137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3727aff58b8d094f0dde1f2333fd14860df8a9871c2d76188af3dc109b671135
[INFO] running `Command { std: "docker" "start" "-a" "3727aff58b8d094f0dde1f2333fd14860df8a9871c2d76188af3dc109b671135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3727aff58b8d094f0dde1f2333fd14860df8a9871c2d76188af3dc109b671135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3727aff58b8d094f0dde1f2333fd14860df8a9871c2d76188af3dc109b671135", kill_on_drop: false }`
[INFO] [stdout] 3727aff58b8d094f0dde1f2333fd14860df8a9871c2d76188af3dc109b671135
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9cd74a885a01095ece1cb3eba74a3b2e2165aac1a4297e11e2687d07e7ce469e
[INFO] running `Command { std: "docker" "start" "-a" "9cd74a885a01095ece1cb3eba74a3b2e2165aac1a4297e11e2687d07e7ce469e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling phf_shared v0.11.1
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9cd74a885a01095ece1cb3eba74a3b2e2165aac1a4297e11e2687d07e7ce469e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cd74a885a01095ece1cb3eba74a3b2e2165aac1a4297e11e2687d07e7ce469e", kill_on_drop: false }`
[INFO] [stdout] 9cd74a885a01095ece1cb3eba74a3b2e2165aac1a4297e11e2687d07e7ce469e