[INFO] crate mixpanel 0.1.1 is already in cache
[INFO] checking mixpanel-0.1.1 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66852
[INFO] extracting crate mixpanel 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mixpanel 0.1.1 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mixpanel 0.1.1
[INFO] finished tweaking crates.io crate mixpanel 0.1.1
[INFO] tweaked toml for crates.io crate mixpanel 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-0/source/examples/example.rs
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 86d7ec92617d870f656f3b39f8436bb48b0440bc0ae352f0f2cd34e36d732f2d
[INFO] running `"docker" "start" "-a" "86d7ec92617d870f656f3b39f8436bb48b0440bc0ae352f0f2cd34e36d732f2d"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/example.rs
[INFO] [stderr]    Compiling openssl-sys v0.6.7
[INFO] [stderr]     Checking serde v0.4.3
[INFO] [stderr] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-0.4.3/src/de/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | /     fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
[INFO] [stderr] 23 | |         where D: Deserializer;
[INFO] [stderr]    | |                              ^
[INFO] [stderr]    | |                              |
[INFO] [stderr]    | |______________________________help: consider further restricting `Self`: `, Self: std::marker::Sized`
[INFO] [stderr]    |                                doesn't have a size known at compile-time
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[INFO] [stderr]    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[INFO] [stderr]    = note: required by `std::result::Result`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `serde`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "86d7ec92617d870f656f3b39f8436bb48b0440bc0ae352f0f2cd34e36d732f2d"`
[INFO] running `"docker" "rm" "-f" "86d7ec92617d870f656f3b39f8436bb48b0440bc0ae352f0f2cd34e36d732f2d"`
[INFO] [stdout] 86d7ec92617d870f656f3b39f8436bb48b0440bc0ae352f0f2cd34e36d732f2d