[INFO] cloning repository https://github.com/IoIxD/fembed
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IoIxD/fembed" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIoIxD%2Ffembed", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIoIxD%2Ffembed'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 627f06fbba7f52e01a15ab6ea84e747bfc5d4184
[INFO] checking IoIxD/fembed against master#6162f6f12339aa81fe16b8a64644ead497e411b2 for pr-113240
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIoIxD%2Ffembed" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/IoIxD/fembed on toolchain 6162f6f12339aa81fe16b8a64644ead497e411b2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/IoIxD/fembed
[INFO] finished tweaking git repo https://github.com/IoIxD/fembed
[INFO] tweaked toml for git repo https://github.com/IoIxD/fembed written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/IoIxD/fembed 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" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.81
[INFO] [stderr]   Downloaded humansize v1.1.1
[INFO] [stderr]   Downloaded memchr v2.3.4
[INFO] [stderr]   Downloaded hyper-rustls v0.23.1
[INFO] [stderr]   Downloaded askama_shared v0.11.2
[INFO] [stderr]   Downloaded askama v0.10.5
[INFO] [stderr]   Downloaded regex v1.4.6
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.81
[INFO] [stderr]   Downloaded cxx-build v1.0.81
[INFO] [stderr]   Downloaded object v0.24.0
[INFO] [stderr]   Downloaded backtrace v0.3.59
[INFO] [stderr]   Downloaded gimli v0.24.0
[INFO] [stderr]   Downloaded addr2line v0.15.2
[INFO] [stderr]   Downloaded cxx v1.0.81
[INFO] [stderr]   Downloaded bitvec v0.19.6
[INFO] [stderr]   Downloaded aho-corasick v0.7.15
[INFO] [stderr]   Downloaded oauth2 v4.3.0
[INFO] [stderr]   Downloaded radium v0.5.3
[INFO] [stderr]   Downloaded nom v6.2.1
[INFO] [stderr]   Downloaded askama_derive v0.10.5
[INFO] [stderr]   Downloaded serde_path_to_error v0.1.8
[INFO] [stderr]   Downloaded oxhttp v0.1.5
[INFO] [stderr]   Downloaded megalodon v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3743d7a92f3bf840c55e820194ae5d07d8047b7c5e835675866dc9054f58f52
[INFO] running `Command { std: "docker" "start" "-a" "f3743d7a92f3bf840c55e820194ae5d07d8047b7c5e835675866dc9054f58f52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3743d7a92f3bf840c55e820194ae5d07d8047b7c5e835675866dc9054f58f52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3743d7a92f3bf840c55e820194ae5d07d8047b7c5e835675866dc9054f58f52", kill_on_drop: false }`
[INFO] [stdout] f3743d7a92f3bf840c55e820194ae5d07d8047b7c5e835675866dc9054f58f52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57f922c7e8f9f693f7aff5b6f31df9bcc20ad7e797b71f6eff1ff1a980e01cd8
[INFO] running `Command { std: "docker" "start" "-a" "57f922c7e8f9f693f7aff5b6f31df9bcc20ad7e797b71f6eff1ff1a980e01cd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.147
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking num_cpus v1.14.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]     Checking mio v0.8.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]     Checking generic-array v0.14.6
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking net2 v0.2.38
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling serde_json v1.0.87
[INFO] [stderr]    Compiling rustls v0.20.7
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking futures-util v0.3.25
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking cpufeatures v0.2.5
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stdout] error: aborting due to 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" "57f922c7e8f9f693f7aff5b6f31df9bcc20ad7e797b71f6eff1ff1a980e01cd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57f922c7e8f9f693f7aff5b6f31df9bcc20ad7e797b71f6eff1ff1a980e01cd8", kill_on_drop: false }`
[INFO] [stdout] 57f922c7e8f9f693f7aff5b6f31df9bcc20ad7e797b71f6eff1ff1a980e01cd8