[INFO] cloning repository https://github.com/ArtieFuzzz/violet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ArtieFuzzz/violet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArtieFuzzz%2Fviolet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArtieFuzzz%2Fviolet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9605718d9e32b7856a61f1f55c98d5c63bcccd7a
[INFO] checking ArtieFuzzz/violet against master#568b11762723b001bfa693d0f21c5dad01d4e813 for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArtieFuzzz%2Fviolet" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ArtieFuzzz/violet
[INFO] finished tweaking git repo https://github.com/ArtieFuzzz/violet
[INFO] tweaked toml for git repo https://github.com/ArtieFuzzz/violet written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ArtieFuzzz/violet on toolchain 568b11762723b001bfa693d0f21c5dad01d4e813
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ArtieFuzzz/violet 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" "+568b11762723b001bfa693d0f21c5dad01d4e813" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustls-pemfile v0.2.1
[INFO] [stderr]   Downloaded unsafe-libyaml v0.2.5
[INFO] [stderr]   Downloaded warp v0.3.3
[INFO] [stderr]   Downloaded neofiglet v0.1.1
[INFO] [stderr]   Downloaded serde_yaml v0.9.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35f0bc8cd9517122503522720b1b1533b5f2e5bb0572f1f1c7a86b5198a5f875
[INFO] running `Command { std: "docker" "start" "-a" "35f0bc8cd9517122503522720b1b1533b5f2e5bb0572f1f1c7a86b5198a5f875", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35f0bc8cd9517122503522720b1b1533b5f2e5bb0572f1f1c7a86b5198a5f875", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35f0bc8cd9517122503522720b1b1533b5f2e5bb0572f1f1c7a86b5198a5f875", kill_on_drop: false }`
[INFO] [stdout] 35f0bc8cd9517122503522720b1b1533b5f2e5bb0572f1f1c7a86b5198a5f875
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+568b11762723b001bfa693d0f21c5dad01d4e813" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e85642e2f31ffd441771e15cb50427fd474a7434b0036884b235ade75ecf44d
[INFO] running `Command { std: "docker" "start" "-a" "7e85642e2f31ffd441771e15cb50427fd474a7434b0036884b235ade75ecf44d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]    Compiling tokio v1.24.2
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking block-buffer v0.10.3
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking digest v0.10.6
[INFO] [stderr]     Checking unicode-bidi v0.3.10
[INFO] [stderr]     Checking indexmap v1.9.2
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.50/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]     Checking sha-1 v0.10.1
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking try-lock v0.2.4
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]     Checking buf_redux v0.8.4
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking sha1 v0.10.5
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]     Checking rustls-pemfile v0.2.1
[INFO] [stderr]     Checking idna v0.3.0
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking unsafe-libyaml v0.2.5
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]     Checking headers-core v0.2.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking neofiglet v0.1.1
[INFO] [stderr]     Checking base64 v0.21.0
[INFO] [stderr]     Checking headers v0.3.8
[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" "7e85642e2f31ffd441771e15cb50427fd474a7434b0036884b235ade75ecf44d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e85642e2f31ffd441771e15cb50427fd474a7434b0036884b235ade75ecf44d", kill_on_drop: false }`
[INFO] [stdout] 7e85642e2f31ffd441771e15cb50427fd474a7434b0036884b235ade75ecf44d
