[INFO] fetching crate kct_package 0.2.0...
[INFO] checking kct_package-0.2.0 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate kct_package 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate kct_package 0.2.0 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kct_package 0.2.0
[INFO] finished tweaking crates.io crate kct_package 0.2.0
[INFO] tweaked toml for crates.io crate kct_package 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1ce48d472f4bfa07491fd3f41727cf724877446cb805786b6dd5c58ad30ebdb
[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" "c1ce48d472f4bfa07491fd3f41727cf724877446cb805786b6dd5c58ad30ebdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1ce48d472f4bfa07491fd3f41727cf724877446cb805786b6dd5c58ad30ebdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1ce48d472f4bfa07491fd3f41727cf724877446cb805786b6dd5c58ad30ebdb", kill_on_drop: false }`
[INFO] [stdout] c1ce48d472f4bfa07491fd3f41727cf724877446cb805786b6dd5c58ad30ebdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be03792cb9ee3892c04924d5eefd74a828c9f55a7b34826868ccb9fb35bb1678
[INFO] running `Command { std: "docker" "start" "-a" "be03792cb9ee3892c04924d5eefd74a828c9f55a7b34826868ccb9fb35bb1678", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling unescape v0.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling structdump v0.1.2
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling jrsonnet-stdlib v0.3.2
[INFO] [stderr]     Checking yansi-term v0.1.2
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking pathdiff v0.2.0
[INFO] [stderr]     Checking closure v0.3.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking annotate-snippets v0.9.0
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling structdump-derive v0.1.2
[INFO] [stderr]     Checking uritemplate-next v0.2.0
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking publicsuffix v1.5.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/structdump-derive-0.1.2/src/lib.rs:22:60
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 let name = Ident::new(&format!("f{}", i), syn::export::Span::call_site());
[INFO] [stdout]    |                                                                        ^^^^ not found in `syn::export`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 1  | use proc_macro2::Span;
[INFO] [stdout]    |
[INFO] [stdout] 1  | use proc_macro::Span;
[INFO] [stdout]    |
[INFO] [stdout] 1  | use proc_macro::bridge::server::Span;
[INFO] [stdout]    |
[INFO] [stdout] 1  | use quote::__private::Span;
[INFO] [stdout]    |
[INFO] [stdout]      and 1 other candidate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/structdump-derive-0.1.2/src/lib.rs:53:60
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let name = Ident::new(&format!("f{}", i), syn::export::Span::call_site());
[INFO] [stdout]    |                                                                        ^^^^ not found in `syn::export`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 1  | use proc_macro2::Span;
[INFO] [stdout]    |
[INFO] [stdout] 1  | use proc_macro::Span;
[INFO] [stdout]    |
[INFO] [stdout] 1  | use proc_macro::bridge::server::Span;
[INFO] [stdout]    |
[INFO] [stdout] 1  | use quote::__private::Span;
[INFO] [stdout]    |
[INFO] [stdout]      and 1 other candidate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `structdump-derive`
[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" "be03792cb9ee3892c04924d5eefd74a828c9f55a7b34826868ccb9fb35bb1678", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be03792cb9ee3892c04924d5eefd74a828c9f55a7b34826868ccb9fb35bb1678", kill_on_drop: false }`
[INFO] [stdout] be03792cb9ee3892c04924d5eefd74a828c9f55a7b34826868ccb9fb35bb1678