[INFO] updating cached repository https://github.com/rjoydip/learn-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] 0e91f308ef5e3ecc09594c3d9db61be3dfe1b6f5
[INFO] checking rjoydip/learn-rust against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frjoydip%2Flearn-rust" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rjoydip/learn-rust on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/rjoydip/learn-rust
[INFO] finished tweaking git repo https://github.com/rjoydip/learn-rust
[INFO] tweaked toml for git repo https://github.com/rjoydip/learn-rust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/rjoydip/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta-2019-10-27" "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] bf86f9a0d087fbcf76cae6007e0725153bd054b0157b2f77dec479fe74065c2a
[INFO] running `"docker" "start" "-a" "bf86f9a0d087fbcf76cae6007e0725153bd054b0157b2f77dec479fe74065c2a"`
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0428]: the name `main` is defined multiple times
[INFO] [stderr]   --> examples/owenership_borrowing.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr]    | --------- previous definition of the value `main` here
[INFO] [stderr] ...
[INFO] [stderr] 21 | fn main() {
[INFO] [stderr]    | ^^^^^^^^^ `main` redefined here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `main` must be defined only once in the value namespace of this module
[INFO] [stderr] 
[INFO] [stderr] error[E0428]: the name `main` is defined multiple times
[INFO] [stderr]   --> examples/owenership_borrowing.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr]    | --------- previous definition of the value `main` here
[INFO] [stderr] ...
[INFO] [stderr] 55 | fn main() {
[INFO] [stderr]    | ^^^^^^^^^ `main` redefined here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `main` must be defined only once in the value namespace of this module
[INFO] [stderr] 
[INFO] [stderr] error[E0428]: the name `main` is defined multiple times
[INFO] [stderr]   --> examples/owenership_borrowing.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr]    | --------- previous definition of the value `main` here
[INFO] [stderr] ...
[INFO] [stderr] 74 | fn main() {
[INFO] [stderr]    | ^^^^^^^^^ `main` redefined here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `main` must be defined only once in the value namespace of this module
[INFO] [stderr] 
[INFO] [stderr] error[E0136]: multiple `main` functions
[INFO] [stderr]   --> examples/owenership_borrowing.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / fn main() {
[INFO] [stderr] 22 | |     let mut _v = Vec::new();
[INFO] [stderr] 23 | |     for i in 1..10 {
[INFO] [stderr] 24 | |         _v.push(i);
[INFO] [stderr] ...  |
[INFO] [stderr] 27 | |     println!("Finihed");
[INFO] [stderr] 28 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] error[E0136]: multiple `main` functions
[INFO] [stderr]   --> examples/owenership_borrowing.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | / fn main() {
[INFO] [stderr] 56 | |     let v = vec![1, 2, 3, 4, 5];
[INFO] [stderr] 57 | |
[INFO] [stderr] 58 | |     borrow1(&v);
[INFO] [stderr] ...  |
[INFO] [stderr] 62 | |     println!("Value of v (inside main fn): {:?}", v);
[INFO] [stderr] 63 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] error[E0136]: multiple `main` functions
[INFO] [stderr]   --> examples/owenership_borrowing.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | / fn main() {
[INFO] [stderr] 75 | |     let a = 1;
[INFO] [stderr] 76 | |     let b = 2;
[INFO] [stderr] 77 | |     let v = vec![1, 2, 1, 2, 1, 3, 4, 5, 3];
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |     println!("Value of a and b is (inside main fn): {}, {}", a, b);
[INFO] [stderr] 87 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0136, E0428.
[INFO] [stderr] For more information about an error, try `rustc --explain E0136`.
[INFO] [stderr] error: could not compile `learn_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0428]: the name `main` is defined multiple times
[INFO] [stderr]   --> examples/struct.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn main() {
[INFO] [stderr]    | --------- previous definition of the value `main` here
[INFO] [stderr] ...
[INFO] [stderr] 32 | fn main() {
[INFO] [stderr]    | ^^^^^^^^^ `main` redefined here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `main` must be defined only once in the value namespace of this module
[INFO] [stderr] 
[INFO] [stderr] error[E0136]: multiple `main` functions
[INFO] [stderr]   --> examples/struct.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | / fn main() {
[INFO] [stderr] 33 | |     let a = A(1);
[INFO] [stderr] 34 | |     let b = B(1.1);
[INFO] [stderr] 35 | |     let c = a.clone();
[INFO] [stderr] 36 | |
[INFO] [stderr] 37 | |     println!("{:?}, {:?}, {:?}", a, b, c);
[INFO] [stderr] 38 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0136, E0428.
[INFO] [stderr] For more information about an error, try `rustc --explain E0136`.
[INFO] [stderr] error: could not compile `learn_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "bf86f9a0d087fbcf76cae6007e0725153bd054b0157b2f77dec479fe74065c2a"`
[INFO] running `"docker" "rm" "-f" "bf86f9a0d087fbcf76cae6007e0725153bd054b0157b2f77dec479fe74065c2a"`
[INFO] [stdout] bf86f9a0d087fbcf76cae6007e0725153bd054b0157b2f77dec479fe74065c2a