[INFO] fetching crate berlin-core 0.2.6...
[INFO] checking berlin-core-0.2.6 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate berlin-core 0.2.6 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate berlin-core 0.2.6
[INFO] finished tweaking crates.io crate berlin-core 0.2.6
[INFO] tweaked toml for crates.io crate berlin-core 0.2.6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate berlin-core 0.2.6 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate berlin-core 0.2.6 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-attributes v0.1.19
[INFO] [stderr]   Downloaded rstest v0.17.0
[INFO] [stderr]   Downloaded serde_derive_internals v0.25.0
[INFO] [stderr]   Downloaded schemars v0.8.8
[INFO] [stderr]   Downloaded rstest_macros v0.17.0
[INFO] [stderr]   Downloaded indextree v4.6.0
[INFO] [stderr]   Downloaded tracing v0.1.30
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.7
[INFO] [stderr]   Downloaded schemars_derive v0.8.8
[INFO] [stderr]   Downloaded getrandom v0.2.4
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.2
[INFO] [stderr]   Downloaded libc v0.2.117
[INFO] [stderr]   Downloaded fst v0.4.7
[INFO] [stderr]   Downloaded deunicode v1.3.1
[INFO] [stderr]   Downloaded ustr v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78a651c6df57e0359d64cf20704322d3ecc01c09449f50a05c23a6c12df2c101
[INFO] running `Command { std: "docker" "start" "-a" "78a651c6df57e0359d64cf20704322d3ecc01c09449f50a05c23a6c12df2c101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78a651c6df57e0359d64cf20704322d3ecc01c09449f50a05c23a6c12df2c101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78a651c6df57e0359d64cf20704322d3ecc01c09449f50a05c23a6c12df2c101", kill_on_drop: false }`
[INFO] [stdout] 78a651c6df57e0359d64cf20704322d3ecc01c09449f50a05c23a6c12df2c101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cfeb324c8d59653260826a6bef583c10bcee7d5ece8facd97252038a5cf33bd6
[INFO] running `Command { std: "docker" "start" "-a" "cfeb324c8d59653260826a6bef583c10bcee7d5ece8facd97252038a5cf33bd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling fst v0.4.7
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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 regex-automata v0.1.10
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]    Compiling schemars v0.8.8
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking tracing-core v0.1.22
[INFO] [stderr]     Checking fixedbitset v0.4.1
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]    Compiling rstest_macros v0.17.0
[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" "cfeb324c8d59653260826a6bef583c10bcee7d5ece8facd97252038a5cf33bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfeb324c8d59653260826a6bef583c10bcee7d5ece8facd97252038a5cf33bd6", kill_on_drop: false }`
[INFO] [stdout] cfeb324c8d59653260826a6bef583c10bcee7d5ece8facd97252038a5cf33bd6