[INFO] fetching crate pdf 0.7.0...
[INFO] checking pdf-0.7.0 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate pdf 0.7.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate pdf 0.7.0 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pdf 0.7.0
[INFO] finished tweaking crates.io crate pdf 0.7.0
[INFO] tweaked toml for crates.io crate pdf 0.7.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4df239d1d20d0091b1a0681c7d451147af7c77979eaf3fd5fb47a92a7a7f007c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4df239d1d20d0091b1a0681c7d451147af7c77979eaf3fd5fb47a92a7a7f007c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4df239d1d20d0091b1a0681c7d451147af7c77979eaf3fd5fb47a92a7a7f007c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4df239d1d20d0091b1a0681c7d451147af7c77979eaf3fd5fb47a92a7a7f007c", kill_on_drop: false }`
[INFO] [stdout] 4df239d1d20d0091b1a0681c7d451147af7c77979eaf3fd5fb47a92a7a7f007c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e2896b8ee62310c7091f34212b52488e26fb35fb7405d006e29ffa3dfaa69b8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7e2896b8ee62310c7091f34212b52488e26fb35fb7405d006e29ffa3dfaa69b8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking ordermap v0.2.13
[INFO] [stderr]     Checking jpeg-decoder v0.1.21
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking itertools v0.6.5
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling snafu-derive v0.4.4
[INFO] [stderr]    Compiling pdf_derive v0.1.20
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pdf_derive-0.1.20/src/lib.rs:99:23
[INFO] [stdout]    |
[INFO] [stdout] 99 | type SynStream = syn::export::TokenStream2;
[INFO] [stdout]    |                       ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pdf_derive`
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7e2896b8ee62310c7091f34212b52488e26fb35fb7405d006e29ffa3dfaa69b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e2896b8ee62310c7091f34212b52488e26fb35fb7405d006e29ffa3dfaa69b8", kill_on_drop: false }`
[INFO] [stdout] 7e2896b8ee62310c7091f34212b52488e26fb35fb7405d006e29ffa3dfaa69b8