[INFO] fetching crate net-sync 0.0.1...
[INFO] testing net-sync-0.0.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate net-sync 0.0.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate net-sync 0.0.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate net-sync 0.0.1
[INFO] finished tweaking crates.io crate net-sync 0.0.1
[INFO] tweaked toml for crates.io crate net-sync 0.0.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded track-macro v0.1.0
[INFO] [stderr]   Downloaded track v0.1.0
[INFO] [stderr]   Downloaded lz4-compress v0.1.1
[INFO] [stderr]   Downloaded serde-diff-derive v0.2.0
[INFO] [stderr]   Downloaded serde-diff v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9698cf3803de4a3bc4d6adceb74c2fe1a2d5f1f81b4ee02526f8fbbda5587718
[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" "9698cf3803de4a3bc4d6adceb74c2fe1a2d5f1f81b4ee02526f8fbbda5587718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9698cf3803de4a3bc4d6adceb74c2fe1a2d5f1f81b4ee02526f8fbbda5587718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9698cf3803de4a3bc4d6adceb74c2fe1a2d5f1f81b4ee02526f8fbbda5587718", kill_on_drop: false }`
[INFO] [stdout] 9698cf3803de4a3bc4d6adceb74c2fe1a2d5f1f81b4ee02526f8fbbda5587718
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bf332f5cb86efea255c738c2f9aa8efec42fe1a5771b37d6737076506635236
[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" "6bf332f5cb86efea255c738c2f9aa8efec42fe1a5771b37d6737076506635236", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling lz4-compress v0.1.1
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling serde-diff-derive v0.2.0
[INFO] [stderr]    Compiling track-macro v0.1.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling serde-diff v0.2.0
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stdout] error[E0603]: module `export` is private
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-diff-0.2.0/src/lib.rs:705:37
[INFO] [stdout]     |
[INFO] [stdout] 705 |                 let value = &serde::export::from_utf8_lossy(value);
[INFO] [stdout]     |                                     ^^^^^^ private module
[INFO] [stdout]     |
[INFO] [stdout] note: the module `export` is defined here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.130/src/lib.rs:275:5
[INFO] [stdout]     |
[INFO] [stdout] 275 | use self::__private as export;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0603`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serde-diff` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6bf332f5cb86efea255c738c2f9aa8efec42fe1a5771b37d6737076506635236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bf332f5cb86efea255c738c2f9aa8efec42fe1a5771b37d6737076506635236", kill_on_drop: false }`
[INFO] [stdout] 6bf332f5cb86efea255c738c2f9aa8efec42fe1a5771b37d6737076506635236