[INFO] fetching crate ff-uint_derive 0.1.4...
[INFO] checking ff-uint_derive-0.1.4 against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] extracting crate ff-uint_derive 0.1.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate ff-uint_derive 0.1.4 on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ff-uint_derive 0.1.4
[INFO] finished tweaking crates.io crate ff-uint_derive 0.1.4
[INFO] tweaked toml for crates.io crate ff-uint_derive 0.1.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e354afcd6e00966c0a6ed97a285ba3ef3fd2eb778ac28b4d39bca9d475ebaaba
[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" "e354afcd6e00966c0a6ed97a285ba3ef3fd2eb778ac28b4d39bca9d475ebaaba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e354afcd6e00966c0a6ed97a285ba3ef3fd2eb778ac28b4d39bca9d475ebaaba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e354afcd6e00966c0a6ed97a285ba3ef3fd2eb778ac28b4d39bca9d475ebaaba", kill_on_drop: false }`
[INFO] [stdout] e354afcd6e00966c0a6ed97a285ba3ef3fd2eb778ac28b4d39bca9d475ebaaba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c28fdb3f97d3eb434322705749eb76dbaeae7cdabf8d18eacae22f5656ae2d51
[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" "c28fdb3f97d3eb434322705749eb76dbaeae7cdabf8d18eacae22f5656ae2d51", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking proc-macro-crate v0.1.5
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking ff-uint_derive v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> src/lib.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |         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] 6  | use proc_macro2::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::bridge::server::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | 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]   --> src/lib.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |         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] 6  | use proc_macro2::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::bridge::server::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | 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]   --> src/lib.rs:97:22
[INFO] [stdout]    |
[INFO] [stdout] 97 |         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] 6  | use proc_macro2::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::bridge::server::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | 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]   --> src/lib.rs:97:22
[INFO] [stdout]    |
[INFO] [stdout] 97 |         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] 6  | use proc_macro2::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | use proc_macro::bridge::server::Span;
[INFO] [stdout]    |
[INFO] [stdout] 6  | 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 `ff-uint_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] [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: build failed
[INFO] running `Command { std: "docker" "inspect" "c28fdb3f97d3eb434322705749eb76dbaeae7cdabf8d18eacae22f5656ae2d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c28fdb3f97d3eb434322705749eb76dbaeae7cdabf8d18eacae22f5656ae2d51", kill_on_drop: false }`
[INFO] [stdout] c28fdb3f97d3eb434322705749eb76dbaeae7cdabf8d18eacae22f5656ae2d51