[INFO] updating cached repository https://github.com/6A/nixcfg
[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] 79bf77f6e7cbe99a9774bf7988458b3350c41695
[INFO] checking 6A/nixcfg against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F6A%2Fnixcfg" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/6A/nixcfg on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/6A/nixcfg
[INFO] finished tweaking git repo https://github.com/6A/nixcfg
[INFO] tweaked toml for git repo https://github.com/6A/nixcfg written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/6A/nixcfg already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "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] d3d331891f33d45d156aa525557aff4d1782f05331f45d5f9c327b6c2a536e79
[INFO] running `"docker" "start" "-a" "d3d331891f33d45d156aa525557aff4d1782f05331f45d5f9c327b6c2a536e79"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.18
[INFO] [stderr]    Compiling cc v1.0.24
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]     Checking arenatree v0.1.0
[INFO] [stderr]     Checking smol_str v0.1.6
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling structopt-derive v0.2.10
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking structopt v0.2.10
[INFO] [stderr]     Checking rnix v0.4.0
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/lib.rs:19:14
[INFO] [stderr]    |
[INFO] [stderr] 19 | #[macro_use] crate mod utils;
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/mod.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | crate mod stack;
[INFO] [stderr]   | ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]   = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | crate struct Stack<I> {
[INFO] [stderr]   | ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]   = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     crate fn new(buffer: [Option<I>; 2]) -> Self {
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]   = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     crate fn first_free_index(&self) -> usize {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     crate fn first_free(&mut self) -> &mut Option<I> {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     crate fn peek(&self) -> Option<&I> {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     crate fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     crate fn push(&mut self, val: I) {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/utils/stack.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     crate fn pop(&mut self) -> Option<I> {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]    = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/parser/mod.rs:176:1
[INFO] [stderr]     |
[INFO] [stderr] 176 | crate type Error = (Option<Span>, ParseError);
[INFO] [stderr]     | ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]     = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `crate` visibility modifier is experimental
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rnix-0.4.0/src/parser/mod.rs:177:1
[INFO] [stderr]     |
[INFO] [stderr] 177 | crate type Result<T> = std::result::Result<T, Error>;
[INFO] [stderr]     | ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #53120 <https://github.com/rust-lang/rust/issues/53120> for more information
[INFO] [stderr]     = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 12 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `rnix`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d3d331891f33d45d156aa525557aff4d1782f05331f45d5f9c327b6c2a536e79"`
[INFO] running `"docker" "rm" "-f" "d3d331891f33d45d156aa525557aff4d1782f05331f45d5f9c327b6c2a536e79"`
[INFO] [stdout] d3d331891f33d45d156aa525557aff4d1782f05331f45d5f9c327b6c2a536e79
