[INFO] cloning repository https://github.com/nathanfaucett/rs-math_ast
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nathanfaucett/rs-math_ast" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathanfaucett%2Frs-math_ast"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathanfaucett%2Frs-math_ast'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cff4334b38bbed4a8ca7f750ba9f6794dc10b8e9
[INFO] checking nathanfaucett/rs-math_ast against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathanfaucett%2Frs-math_ast" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nathanfaucett/rs-math_ast on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nathanfaucett/rs-math_ast
[INFO] finished tweaking git repo https://github.com/nathanfaucett/rs-math_ast
[INFO] tweaked toml for git repo https://github.com/nathanfaucett/rs-math_ast written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/nathanfaucett/rs-math_ast already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/nathanfaucett/rs-lexer.git`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b45a6ef1a3b3f9d14dc3445f490d90cb909554023710d1491dcf95203bc498e5
[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" "b45a6ef1a3b3f9d14dc3445f490d90cb909554023710d1491dcf95203bc498e5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking collection_traits v0.1.0 (https://github.com/nathanfaucett/rs-collection_traits.git#a75d1c20)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(custom_attribute)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stderr]   |
[INFO] [stderr]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `alloc::linked_list`, `alloc::linked_list`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | use alloc::linked_list::{self, LinkedList};
[INFO] [stderr]   |            ^^^^^^^^^^^   ^^^^ no `linked_list` in the root
[INFO] [stderr]   |            |
[INFO] [stderr]   |            could not find `linked_list` in `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Iter` in module `linked_list`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:75:30
[INFO] [stderr]    |
[INFO] [stderr] 75 |     type Iter = linked_list::Iter<'a, T>;
[INFO] [stderr]    |                              ^^^^ not found in `linked_list`
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::binary_heap::Iter;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::btree_map::Iter;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::btree_set::Iter;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::linked_list::Iter;
[INFO] [stderr]    |
[INFO] [stderr]      and 9 other candidates
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `IterMut` in module `linked_list`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:84:33
[INFO] [stderr]    |
[INFO] [stderr] 84 |     type IterMut = linked_list::IterMut<'a, T>;
[INFO] [stderr]    |                                 ^^^^^^^ not found in `linked_list`
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::btree_map::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::linked_list::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::vec_deque::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::slice::IterMut;
[INFO] [stderr]    |
[INFO] [stderr]      and 4 other candidates
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0432, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `collection_traits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b45a6ef1a3b3f9d14dc3445f490d90cb909554023710d1491dcf95203bc498e5"`
[INFO] running `"docker" "rm" "-f" "b45a6ef1a3b3f9d14dc3445f490d90cb909554023710d1491dcf95203bc498e5"`
[INFO] [stdout] b45a6ef1a3b3f9d14dc3445f490d90cb909554023710d1491dcf95203bc498e5