[INFO] fetching crate fawkes-crypto 3.0.3...
[INFO] checking fawkes-crypto-3.0.3 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate fawkes-crypto 3.0.3 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate fawkes-crypto 3.0.3 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fawkes-crypto 3.0.3
[INFO] finished tweaking crates.io crate fawkes-crypto 3.0.3
[INFO] tweaked toml for crates.io crate fawkes-crypto 3.0.3 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "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-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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 330bc3b997840c9c6e2115e84ec8e42c594eeabe4f25198c0810f3fee4e5c25d
[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" "330bc3b997840c9c6e2115e84ec8e42c594eeabe4f25198c0810f3fee4e5c25d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "330bc3b997840c9c6e2115e84ec8e42c594eeabe4f25198c0810f3fee4e5c25d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "330bc3b997840c9c6e2115e84ec8e42c594eeabe4f25198c0810f3fee4e5c25d", kill_on_drop: false }`
[INFO] [stdout] 330bc3b997840c9c6e2115e84ec8e42c594eeabe4f25198c0810f3fee4e5c25d
[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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1b07f31146f79a8e60e77e76c0795c14fbb7b906d28f9f467a41f46bcf2c41c
[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" "c1b07f31146f79a8e60e77e76c0795c14fbb7b906d28f9f467a41f46bcf2c41c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling ref-cast v1.0.6
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking linked-list v0.0.3
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking arrayvec v0.4.12
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking blake2-rfc_bellman_edition v0.0.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking seedbox v0.1.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling ff_derive_ce v0.5.1
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.7.2
[INFO] [stderr]    Compiling borsh-derive-internal v0.7.2
[INFO] [stderr]     Checking ff_ce v0.7.1
[INFO] [stderr]     Checking fawkes-crypto-pairing_ce v0.18.1
[INFO] [stderr]     Checking fawkes-crypto-bellman_ce v0.3.4
[INFO] [stderr]    Compiling borsh-derive v0.7.2
[INFO] [stderr]    Compiling ref-cast-impl v1.0.6
[INFO] [stderr]    Compiling concat-idents v1.1.2
[INFO] [stderr]    Compiling fawkes-crypto_derive v3.0.3
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.1.3
[INFO] [stderr]     Checking borsh v0.7.2
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling ff-uint_derive v0.1.4
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ff-uint_derive-0.1.4/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]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ff-uint_derive-0.1.4/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] running `Command { std: "docker" "inspect" "c1b07f31146f79a8e60e77e76c0795c14fbb7b906d28f9f467a41f46bcf2c41c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1b07f31146f79a8e60e77e76c0795c14fbb7b906d28f9f467a41f46bcf2c41c", kill_on_drop: false }`
[INFO] [stdout] c1b07f31146f79a8e60e77e76c0795c14fbb7b906d28f9f467a41f46bcf2c41c