[INFO] updating cached repository https://github.com/racer-rust/racer
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 39ab1c541b8e4e861423a67c8745658792af5822
[INFO] checking racer-rust/racer against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fracer-rust%2Fracer" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/racer-rust/racer on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/racer-rust/racer
[INFO] removed workspace from git repo https://github.com/racer-rust/racer
[INFO] removed path dependency racer-cargo-metadata from git repo https://github.com/racer-rust/racer
[INFO] removed path dependency racer-testutils from git repo https://github.com/racer-rust/racer
[INFO] finished tweaking git repo https://github.com/racer-rust/racer
[INFO] tweaked toml for git repo https://github.com/racer-rust/racer written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/racer-rust/racer already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-8/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+b61e69433951e31f7bd746e22f516a48ad41623b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c20c12da4273026ad86345a8e2f28a50fd6ecac3fdd99c94b685c6f0f8f6bd61
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c20c12da4273026ad86345a8e2f28a50fd6ecac3fdd99c94b685c6f0f8f6bd61"`
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.0
[INFO] [stderr]    Compiling rustc-rayon-core v0.2.0
[INFO] [stderr]    Compiling rustc-rayon v0.2.0
[INFO] [stderr]     Checking unicode-xid v0.2.0
[INFO] [stderr]     Checking rustc-ap-graphviz v610.0.0
[INFO] [stderr]     Checking rustc-ap-graphviz v606.0.0
[INFO] [stderr]     Checking annotate-snippets v0.6.1
[INFO] [stderr]    Compiling rustc-ap-rustc_target v610.0.0
[INFO] [stderr]    Compiling rustc-ap-rustc_target v606.0.0
[INFO] [stderr]    Compiling rustc-ap-syntax v610.0.0
[INFO] [stderr]    Compiling rustc-ap-syntax v606.0.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v610.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v606.0.0
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking ena v0.13.1
[INFO] [stderr]     Checking jobserver v0.1.17
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking racer-interner v0.1.0
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking rls-span v0.5.2
[INFO] [stderr]     Checking rustc-ap-serialize v610.0.0
[INFO] [stderr]     Checking rustc-ap-serialize v606.0.0
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v610.0.0
[INFO] [stderr]     Checking racer-cargo-metadata v0.1.1
[INFO] [stderr]     Checking rustc-rayon v0.3.0
[INFO] [stderr]     Checking rustc-ap-rustc_index v606.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_index v610.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v606.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v610.0.0
[INFO] [stderr]     Checking rustc-ap-arena v606.0.0
[INFO] [stderr]     Checking rustc-ap-arena v610.0.0
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking rustc-ap-syntax_pos v610.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v610.0.0
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v606.0.0
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]     Checking rustc-ap-syntax_pos v606.0.0
[INFO] [stderr] error[E0407]: method `mixed_site` is not a member of trait `server::Span`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-syntax-610.0.0/ext/proc_macro_server.rs:669:5
[INFO] [stderr]     |
[INFO] [stderr] 669 | /     fn mixed_site(&mut self) -> Self::Span {
[INFO] [stderr] 670 | |         self.mixed_site
[INFO] [stderr] 671 | |     }
[INFO] [stderr]     | |_____^ not a member of trait `server::Span`
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'mem_take'
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-syntax-610.0.0/parse/parser.rs:1535:22
[INFO] [stderr]      |
[INFO] [stderr] 1535 |                 Some(mem::take(list))
[INFO] [stderr]      |                      ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/61129
[INFO] [stderr]      = help: add `#![feature(mem_take)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'mem_take'
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-syntax-610.0.0/parse/parser.rs:1558:49
[INFO] [stderr]      |
[INFO] [stderr] 1558 |             LastToken::Collecting(ref mut v) => mem::take(v),
[INFO] [stderr]      |                                                 ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/61129
[INFO] [stderr]      = help: add `#![feature(mem_take)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'mem_take'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-syntax-610.0.0/ext/expand.rs:351:31
[INFO] [stderr]     |
[INFO] [stderr] 351 |                 invocations = mem::take(&mut undetermined_invocations);
[INFO] [stderr]     |                               ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/61129
[INFO] [stderr]     = help: add `#![feature(mem_take)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'mem_take'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-syntax-610.0.0/ext/mbe/transcribe.rs:275:35
[INFO] [stderr]     |
[INFO] [stderr] 275 |                 result_stack.push(mem::take(&mut result));
[INFO] [stderr]     |                                   ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/61129
[INFO] [stderr]     = help: add `#![feature(mem_take)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr]     Checking rustc-ap-rustc_errors v606.0.0
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0407, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0407`.
[INFO] [stderr] error: could not compile `rustc-ap-syntax`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c20c12da4273026ad86345a8e2f28a50fd6ecac3fdd99c94b685c6f0f8f6bd61"`
[INFO] running `"docker" "rm" "-f" "c20c12da4273026ad86345a8e2f28a50fd6ecac3fdd99c94b685c6f0f8f6bd61"`
[INFO] [stdout] c20c12da4273026ad86345a8e2f28a50fd6ecac3fdd99c94b685c6f0f8f6bd61