[INFO] cloning repository https://github.com/AlienKevin/arborist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlienKevin/arborist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlienKevin%2Farborist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlienKevin%2Farborist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0a0764456502827a578e9b2400913c584fe217f
[INFO] checking AlienKevin/arborist against master#292be5c7c05138d753bbd4b30db7a3f1a5c914f7 for pr-148271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlienKevin%2Farborist" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AlienKevin/arborist
[INFO] removed 1 missing tests
[INFO] finished tweaking git repo https://github.com/AlienKevin/arborist
[INFO] tweaked toml for git repo https://github.com/AlienKevin/arborist written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AlienKevin/arborist on toolchain 292be5c7c05138d753bbd4b30db7a3f1a5c914f7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AlienKevin/arborist 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" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/MIPL-group/dot-rust`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/MIPL-group/scraper`
[INFO] [stderr]     Updating git repository `https://github.com/MIPL-group/ego-tree`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serial_test_derive v0.10.0
[INFO] [stderr]   Downloaded dot-generator v0.1.0
[INFO] [stderr]   Downloaded into-attr-derive v0.1.0
[INFO] [stderr]   Downloaded cssparser-macros v0.6.0
[INFO] [stderr]   Downloaded dot-structures v0.1.0
[INFO] [stderr]   Downloaded futures-task v0.3.25
[INFO] [stderr]   Downloaded symbolic-common v10.2.1
[INFO] [stderr]   Downloaded graphviz-rust v0.5.1
[INFO] [stderr]   Downloaded pest_meta v2.5.2
[INFO] [stderr]   Downloaded pest_derive v2.5.2
[INFO] [stderr]   Downloaded cc v1.0.78
[INFO] [stderr]   Downloaded serde_derive v1.0.142
[INFO] [stderr]   Downloaded pest v2.5.2
[INFO] [stderr]   Downloaded futures-util v0.3.25
[INFO] [stderr]   Downloaded serde_json v1.0.83
[INFO] [stderr]   Downloaded petgraph v0.6.2
[INFO] [stderr]   Downloaded im-rc v15.1.0
[INFO] [stderr]   Downloaded syn v1.0.99
[INFO] [stderr]   Downloaded object v0.30.2
[INFO] [stderr]   Downloaded symbolic-demangle v10.2.1
[INFO] [stderr]   Downloaded serde v1.0.142
[INFO] [stderr]   Downloaded ustr v0.9.0
[INFO] [stderr]   Downloaded prettyplease v0.1.23
[INFO] [stderr]   Downloaded prost v0.11.6
[INFO] [stderr]   Downloaded libc v0.2.127
[INFO] [stderr]   Downloaded uuid v1.2.2
[INFO] [stderr]   Downloaded gimli v0.27.0
[INFO] [stderr]   Downloaded serial_test v0.10.0
[INFO] [stderr]   Downloaded pprof v0.11.0
[INFO] [stderr]   Downloaded indexmap v1.9.2
[INFO] [stderr]   Downloaded into-attr v0.1.0
[INFO] [stderr]   Downloaded prost-types v0.11.6
[INFO] [stderr]   Downloaded which v4.3.0
[INFO] [stderr]   Downloaded memmap2 v0.5.8
[INFO] [stderr]   Downloaded semver v1.0.13
[INFO] [stderr]   Downloaded futures-channel v0.3.25
[INFO] [stderr]   Downloaded futures v0.3.25
[INFO] [stderr]   Downloaded internment v0.7.0
[INFO] [stderr]   Downloaded unicode-ident v1.0.3
[INFO] [stderr]   Downloaded prost-build v0.11.6
[INFO] [stderr]   Downloaded futures-core v0.3.25
[INFO] [stderr]   Downloaded pest_generator v2.5.2
[INFO] [stderr]   Downloaded prost-derive v0.11.6
[INFO] [stderr]   Downloaded string_cache v0.8.4
[INFO] [stderr]   Downloaded serde_plain v1.0.1
[INFO] [stderr]   Downloaded dashmap v5.3.4
[INFO] [stderr]   Downloaded futures-executor v0.3.25
[INFO] [stderr]   Downloaded futures-io v0.3.25
[INFO] [stderr]   Downloaded futures-sink v0.3.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 159c1182888699d63601cb7409818a39eddf70a3d4be56729a3ef3f730655e3e
[INFO] running `Command { std: "docker" "start" "-a" "159c1182888699d63601cb7409818a39eddf70a3d4be56729a3ef3f730655e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "159c1182888699d63601cb7409818a39eddf70a3d4be56729a3ef3f730655e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "159c1182888699d63601cb7409818a39eddf70a3d4be56729a3ef3f730655e3e", kill_on_drop: false }`
[INFO] [stdout] 159c1182888699d63601cb7409818a39eddf70a3d4be56729a3ef3f730655e3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4f3f19c8b1c5c198fe28574a05231a3a14c9c4c8905c93b7e1eedc6040784f4
[INFO] running `Command { std: "docker" "start" "-a" "f4f3f19c8b1c5c198fe28574a05231a3a14c9c4c8905c93b7e1eedc6040784f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.127
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling serde_derive v1.0.142
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling serde v1.0.142
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling either v1.7.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling prettyplease v0.1.23
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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 futures-core v0.3.25
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]    Compiling dot-structures v0.1.0
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking uuid v1.2.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[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" "f4f3f19c8b1c5c198fe28574a05231a3a14c9c4c8905c93b7e1eedc6040784f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4f3f19c8b1c5c198fe28574a05231a3a14c9c4c8905c93b7e1eedc6040784f4", kill_on_drop: false }`
[INFO] [stdout] f4f3f19c8b1c5c198fe28574a05231a3a14c9c4c8905c93b7e1eedc6040784f4
