[INFO] crate two-sided-vec 0.1.6 is already in cache
[INFO] extracting crate two-sided-vec 0.1.6 into work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/two-sided-vec/0.1.6
[INFO] extracting crate two-sided-vec 0.1.6 into work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/two-sided-vec/0.1.6
[INFO] validating manifest of two-sided-vec-0.1.6 on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of two-sided-vec-0.1.6 on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-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-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/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-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/two-sided-vec/0.1.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking two-sided-vec-0.1.6 against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-3/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2911087b0c86d7932f5e4893a3342d9311e9997cfc2e65564f836e7da1891b3e
[INFO] running `"docker" "start" "-a" "2911087b0c86d7932f5e4893a3342d9311e9997cfc2e65564f836e7da1891b3e"`
[INFO] [stderr]     Checking two-sided-vec v0.1.6 (/opt/crater/workdir)
[INFO] [stderr]     Checking serde_test v1.0.99
[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" "2911087b0c86d7932f5e4893a3342d9311e9997cfc2e65564f836e7da1891b3e"`
[INFO] running `"docker" "rm" "-f" "2911087b0c86d7932f5e4893a3342d9311e9997cfc2e65564f836e7da1891b3e"`
[INFO] [stdout] 2911087b0c86d7932f5e4893a3342d9311e9997cfc2e65564f836e7da1891b3e