[INFO] fetching crate gradient_tui_fork 0.19.0...
[INFO] checking gradient_tui_fork-0.19.0 against master#3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777 for pr-132289
[INFO] extracting crate gradient_tui_fork 0.19.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate gradient_tui_fork 0.19.0 on toolchain 3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gradient_tui_fork 0.19.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate gradient_tui_fork 0.19.0
[INFO] tweaked toml for crates.io crate gradient_tui_fork 0.19.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate gradient_tui_fork 0.19.0 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" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded csscolorparser v0.6.2
[INFO] [stderr]   Downloaded termion v1.5.6
[INFO] [stderr]   Downloaded phf_shared v0.11.1
[INFO] [stderr]   Downloaded phf v0.11.1
[INFO] [stderr]   Downloaded colorgrad v0.6.2
[INFO] [stderr]   Downloaded argh_derive v0.1.10
[INFO] [stderr]   Downloaded phf_macros v0.11.1
[INFO] [stderr]   Downloaded argh_shared v0.1.10
[INFO] [stderr]   Downloaded argh v0.1.10
[INFO] [stderr]   Downloaded phf_generator v0.11.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5bd48ec281a55e0bb95cf6fffa1c6280df1bbd3a84a8ffe84fb8107abe78f2b
[INFO] running `Command { std: "docker" "start" "-a" "c5bd48ec281a55e0bb95cf6fffa1c6280df1bbd3a84a8ffe84fb8107abe78f2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5bd48ec281a55e0bb95cf6fffa1c6280df1bbd3a84a8ffe84fb8107abe78f2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5bd48ec281a55e0bb95cf6fffa1c6280df1bbd3a84a8ffe84fb8107abe78f2b", kill_on_drop: false }`
[INFO] [stdout] c5bd48ec281a55e0bb95cf6fffa1c6280df1bbd3a84a8ffe84fb8107abe78f2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 793dcc234ded95dc379886d376550872628493b0645eda16c71e7f9218ce0c65
[INFO] running `Command { std: "docker" "start" "-a" "793dcc234ded95dc379886d376550872628493b0645eda16c71e7f9218ce0c65", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling phf_shared v0.11.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/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]    Compiling argh_shared v0.1.10
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking unicode-width v0.1.10
[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" "793dcc234ded95dc379886d376550872628493b0645eda16c71e7f9218ce0c65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "793dcc234ded95dc379886d376550872628493b0645eda16c71e7f9218ce0c65", kill_on_drop: false }`
[INFO] [stdout] 793dcc234ded95dc379886d376550872628493b0645eda16c71e7f9218ce0c65
