[INFO] fetching crate bystr 0.1.3...
[INFO] checking bystr-0.1.3 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate bystr 0.1.3 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate bystr 0.1.3 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bystr 0.1.3
[INFO] finished tweaking crates.io crate bystr 0.1.3
[INFO] tweaked toml for crates.io crate bystr 0.1.3 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] acb3b99854d8c63e0a733b2c86bdcfc9447f9f422224b2708e941f17ac4b7402
[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" "acb3b99854d8c63e0a733b2c86bdcfc9447f9f422224b2708e941f17ac4b7402", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acb3b99854d8c63e0a733b2c86bdcfc9447f9f422224b2708e941f17ac4b7402", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acb3b99854d8c63e0a733b2c86bdcfc9447f9f422224b2708e941f17ac4b7402", kill_on_drop: false }`
[INFO] [stdout] acb3b99854d8c63e0a733b2c86bdcfc9447f9f422224b2708e941f17ac4b7402
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec8ff72cf5990d4dc3a6273e2830f0de7c6ae061778b7f802c0a3aec2a63961e
[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" "ec8ff72cf5990d4dc3a6273e2830f0de7c6ae061778b7f802c0a3aec2a63961e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling bystr-impl v0.1.3
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/bystr-impl-0.1.3/src/lib.rs:15:83
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn stringify(input: &syn::parse::ParseStream) -> syn::parse::Result<(String, syn::export::Span)> {
[INFO] [stdout]    |                                                                                   ^^^^^^ could not find `export` in `syn`
[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/bystr-impl-0.1.3/src/lib.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     span: syn::export::Span,
[INFO] [stdout]    |                ^^^^^^ could not find `export` in `syn`
[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/bystr-impl-0.1.3/src/lib.rs:35:42
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let mut len: Option<(usize, syn::export::Span)> = None;
[INFO] [stdout]    |                                          ^^^^^^ could not find `export` in `syn`
[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/bystr-impl-0.1.3/src/lib.rs:72:35
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn byte_to_expr(b: u8, span: syn::export::Span) -> syn::Expr {
[INFO] [stdout]    |                                   ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 `bystr-impl`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ec8ff72cf5990d4dc3a6273e2830f0de7c6ae061778b7f802c0a3aec2a63961e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec8ff72cf5990d4dc3a6273e2830f0de7c6ae061778b7f802c0a3aec2a63961e", kill_on_drop: false }`
[INFO] [stdout] ec8ff72cf5990d4dc3a6273e2830f0de7c6ae061778b7f802c0a3aec2a63961e