[INFO] fetching crate two-sided-vec 0.1.6...
[INFO] extracting crate two-sided-vec 0.1.6 into work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/two-sided-vec/0.1.6
[INFO] extracting crate two-sided-vec 0.1.6 into work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/two-sided-vec/0.1.6
[INFO] validating manifest of two-sided-vec-0.1.6 on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of two-sided-vec-0.1.6 on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing two-sided-vec-0.1.6
[INFO] finished frobbing two-sided-vec-0.1.6
[INFO] frobbed toml for two-sided-vec-0.1.6 written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/two-sided-vec/0.1.6/Cargo.toml
[INFO] started frobbing two-sided-vec-0.1.6
[INFO] finished frobbing two-sided-vec-0.1.6
[INFO] frobbed toml for two-sided-vec-0.1.6 written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/two-sided-vec/0.1.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking two-sided-vec-0.1.6 against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-5/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/two-sided-vec/0.1.6:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2382e18acca1e31a39b422ec0151fd28d4740343861659836b1a5e1b7bb8ae76
[INFO] running `"docker" "start" "-a" "2382e18acca1e31a39b422ec0151fd28d4740343861659836b1a5e1b7bb8ae76"`
[INFO] [stderr]     Checking two-sided-vec v0.1.6 (/opt/crater/workdir)
[INFO] [stderr]     Checking serde_test v1.0.92
[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]    = note: required by `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]    = note: required by `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" "2382e18acca1e31a39b422ec0151fd28d4740343861659836b1a5e1b7bb8ae76"`
[INFO] running `"docker" "rm" "-f" "2382e18acca1e31a39b422ec0151fd28d4740343861659836b1a5e1b7bb8ae76"`
[INFO] [stdout] 2382e18acca1e31a39b422ec0151fd28d4740343861659836b1a5e1b7bb8ae76