[INFO] fetching crate mazter 1.0.0...
[INFO] checking mazter-1.0.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate mazter 1.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate mazter 1.0.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mazter 1.0.0
[INFO] finished tweaking crates.io crate mazter 1.0.0
[INFO] tweaked toml for crates.io crate mazter 1.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate mazter 1.0.0 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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.163
[INFO] [stderr]   Downloaded crokey-proc_macros v0.4.0
[INFO] [stderr]   Downloaded file-size v1.0.3
[INFO] [stderr]   Downloaded proc-status v0.1.1
[INFO] [stderr]   Downloaded cli-log v2.0.0
[INFO] [stderr]   Downloaded minimad v0.11.0
[INFO] [stderr]   Downloaded serde_derive v1.0.163
[INFO] [stderr]   Downloaded whoami v1.2.1
[INFO] [stderr]   Downloaded quote v1.0.27
[INFO] [stderr]   Downloaded crokey v0.4.3
[INFO] [stderr]   Downloaded anyhow v1.0.58
[INFO] [stderr]   Downloaded coolor v0.5.0
[INFO] [stderr]   Downloaded crossterm v0.23.2
[INFO] [stderr]   Downloaded termimad v0.22.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bec214cca7a332d99cefe0c1fbc17ef82a43c4581a56b804cd5f71e82bc1e442
[INFO] running `Command { std: "docker" "start" "-a" "bec214cca7a332d99cefe0c1fbc17ef82a43c4581a56b804cd5f71e82bc1e442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bec214cca7a332d99cefe0c1fbc17ef82a43c4581a56b804cd5f71e82bc1e442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bec214cca7a332d99cefe0c1fbc17ef82a43c4581a56b804cd5f71e82bc1e442", kill_on_drop: false }`
[INFO] [stdout] bec214cca7a332d99cefe0c1fbc17ef82a43c4581a56b804cd5f71e82bc1e442
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54f7f86d5ba370d5ea383bdd218f1c419c1acbcaac1c748894c5ea9add2294dc
[INFO] running `Command { std: "docker" "start" "-a" "54f7f86d5ba370d5ea383bdd218f1c419c1acbcaac1c748894c5ea9add2294dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.2
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/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 os_str_bytes v6.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]     Checking minimad v0.11.0
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking file-size v1.0.3
[INFO] [stderr]     Checking signal-hook-mio v0.2.3
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "54f7f86d5ba370d5ea383bdd218f1c419c1acbcaac1c748894c5ea9add2294dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54f7f86d5ba370d5ea383bdd218f1c419c1acbcaac1c748894c5ea9add2294dc", kill_on_drop: false }`
[INFO] [stdout] 54f7f86d5ba370d5ea383bdd218f1c419c1acbcaac1c748894c5ea9add2294dc
