[INFO] fetching crate two-sided-vec 0.1.6...
[INFO] checking two-sided-vec-0.1.6 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate two-sided-vec 0.1.6 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate two-sided-vec 0.1.6 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate two-sided-vec 0.1.6
[INFO] finished tweaking crates.io crate two-sided-vec 0.1.6
[INFO] tweaked toml for crates.io crate two-sided-vec 0.1.6 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 28ea6cf89b763335ddad19210a5136e658c39465759617f91413800a7409ecfe
[INFO] running `"docker" "start" "-a" "28ea6cf89b763335ddad19210a5136e658c39465759617f91413800a7409ecfe"`
[INFO] [stderr]     Checking two-sided-vec v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/basic.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate serde;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `two_sided_vec::TwoSidedVec<{integer}>: serde::ser::Serialize` is not satisfied
[INFO] [stderr]   --> tests/basic.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     ::serde_test::assert_tokens(&values, &[
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `two_sided_vec::TwoSidedVec<{integer}>`
[INFO] [stderr]    | 
[INFO] [stderr]   ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_test-1.0.101/src/assert.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |     T: Serialize + Deserialize<'de> + PartialEq + Debug,
[INFO] [stderr]    |        --------- required by this bound in `serde_test::assert_tokens`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `two_sided_vec::TwoSidedVec<{integer}>: serde::de::Deserialize<'_>` is not satisfied
[INFO] [stderr]   --> tests/basic.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     ::serde_test::assert_tokens(&values, &[
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `serde::de::Deserialize<'_>` is not implemented for `two_sided_vec::TwoSidedVec<{integer}>`
[INFO] [stderr]    | 
[INFO] [stderr]   ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_test-1.0.101/src/assert.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |     T: Serialize + Deserialize<'de> + PartialEq + Debug,
[INFO] [stderr]    |                    ---------------- required by this bound in `serde_test::assert_tokens`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `two-sided-vec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "28ea6cf89b763335ddad19210a5136e658c39465759617f91413800a7409ecfe"`
[INFO] running `"docker" "rm" "-f" "28ea6cf89b763335ddad19210a5136e658c39465759617f91413800a7409ecfe"`
[INFO] [stdout] 28ea6cf89b763335ddad19210a5136e658c39465759617f91413800a7409ecfe