[INFO] updating cached repository https://github.com/modulitos/CtCI-rust
[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] 8bbaa49c3eca43a77cf1a2cea1b6f98071ad2c78
[INFO] checking modulitos/CtCI-rust against try#5e633973aa9255a88b65a39484627bb54e6044b3 for pr-66063
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2FCtCI-rust" "/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/modulitos/CtCI-rust on toolchain 5e633973aa9255a88b65a39484627bb54e6044b3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/modulitos/CtCI-rust
[INFO] finished tweaking git repo https://github.com/modulitos/CtCI-rust
[INFO] tweaked toml for git repo https://github.com/modulitos/CtCI-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/modulitos/CtCI-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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=allow" "-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" "+5e633973aa9255a88b65a39484627bb54e6044b3" "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] 7d870a373aba2a7f798a5ee67ec0340146a34bb1c14ec063fd3f299c69a08562
[INFO] running `"docker" "start" "-a" "7d870a373aba2a7f798a5ee67ec0340146a34bb1c14ec063fd3f299c69a08562"`
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling derive_more v0.15.0
[INFO] [stderr]     Checking rust-solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `ch4_p8_first_common_ancestor`
[INFO] [stderr]    --> src/bin/ch4-p8_first-common-ancestor.rs:6:1
[INFO] [stderr]     |
[INFO] [stderr] 6   | / use cracking::{RCBTree as Tree, RCBTreeNode as Node, RCBinaryTree as BinaryTree};
[INFO] [stderr] 7   | | use std::rc::Rc;
[INFO] [stderr] 8   | |
[INFO] [stderr] 9   | | trait FirstCommonAncestor<T> {
[INFO] [stderr] ...   |
[INFO] [stderr] 242 | |     }
[INFO] [stderr] 243 | | }
[INFO] [stderr]     | |_^ consider adding a `main` function to `src/bin/ch4-p8_first-common-ancestor.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `rust-solutions`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0601]: `main` function not found in crate `ch5_p7_pairwise_swap`
[INFO] [stderr]   --> src/bin/ch5-p7_pairwise-swap.rs:5:1
[INFO] [stderr]    |
[INFO] [stderr] 5  | / fn pairwise_swap(n: u8) -> u8 {
[INFO] [stderr] 6  | |     let even_mask = 0b10101010_u8;
[INFO] [stderr] 7  | |     let odd_mask = even_mask >> 1;
[INFO] [stderr] 8  | |
[INFO] [stderr] ...  |
[INFO] [stderr] 16 | |     assert_eq!(pairwise_swap(0b01010111_u8), 0b10101011_u8);
[INFO] [stderr] 17 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `src/bin/ch5-p7_pairwise-swap.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error[E0601]: `main` function not found in crate `ch3_p4_queue_via_stacks`
[INFO] [stderr]   --> src/bin/ch3-p4_queue-via-stacks.rs:4:1
[INFO] [stderr]    |
[INFO] [stderr] 4  | / use cracking::Stack;
[INFO] [stderr] 5  | |
[INFO] [stderr] 6  | | struct MyQueue<T> {
[INFO] [stderr] 7  | |     incoming: Stack<T>,
[INFO] [stderr] ...  |
[INFO] [stderr] 96 | |     }
[INFO] [stderr] 97 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `src/bin/ch3-p4_queue-via-stacks.rs`
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rust-solutions`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `rust-solutions`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7d870a373aba2a7f798a5ee67ec0340146a34bb1c14ec063fd3f299c69a08562"`
[INFO] running `"docker" "rm" "-f" "7d870a373aba2a7f798a5ee67ec0340146a34bb1c14ec063fd3f299c69a08562"`
[INFO] [stdout] 7d870a373aba2a7f798a5ee67ec0340146a34bb1c14ec063fd3f299c69a08562