[INFO] cloning repository https://github.com/dairyisscary/for-your-reference-part-4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dairyisscary/for-your-reference-part-4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdairyisscary%2Ffor-your-reference-part-4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdairyisscary%2Ffor-your-reference-part-4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39fc1303b36056a8c7096d94f867b99911ab0631
[INFO] checking dairyisscary/for-your-reference-part-4 against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdairyisscary%2Ffor-your-reference-part-4" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dairyisscary/for-your-reference-part-4
[INFO] finished tweaking git repo https://github.com/dairyisscary/for-your-reference-part-4
[INFO] tweaked toml for git repo https://github.com/dairyisscary/for-your-reference-part-4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dairyisscary/for-your-reference-part-4 on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dairyisscary/for-your-reference-part-4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abdabcad45e95a02ef84d73688f5210a85508ec888e4de936d455ad40ade4663
[INFO] running `Command { std: "docker" "start" "-a" "abdabcad45e95a02ef84d73688f5210a85508ec888e4de936d455ad40ade4663", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abdabcad45e95a02ef84d73688f5210a85508ec888e4de936d455ad40ade4663", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abdabcad45e95a02ef84d73688f5210a85508ec888e4de936d455ad40ade4663", kill_on_drop: false }`
[INFO] [stdout] abdabcad45e95a02ef84d73688f5210a85508ec888e4de936d455ad40ade4663
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14a00ad0eb7a8c351ef2098718e26f1ecbd067b0a291d5644ca5d044c253a332
[INFO] running `Command { std: "docker" "start" "-a" "14a00ad0eb7a8c351ef2098718e26f1ecbd067b0a291d5644ca5d044c253a332", kill_on_drop: false }`
[INFO] [stderr]     Checking five v0.1.0 (/opt/rustwide/workdir/five)
[INFO] [stderr]     Checking two v0.1.0 (/opt/rustwide/workdir/two)
[INFO] [stderr]     Checking one v0.1.0 (/opt/rustwide/workdir/one)
[INFO] [stderr]     Checking three v0.1.0 (/opt/rustwide/workdir/three)
[INFO] [stderr]     Checking four v0.1.0 (/opt/rustwide/workdir/four)
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]  --> three/src/main.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn ops_dangle() -> &Vec<i32> {
[INFO] [stdout]   |                    ^ expected named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
[INFO] [stdout] help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn ops_dangle() -> &'static Vec<i32> {
[INFO] [stdout]   |                     +++++++
[INFO] [stdout] help: instead, you are more likely to want to return an owned value
[INFO] [stdout]   |
[INFO] [stdout] 6 - fn ops_dangle() -> &Vec<i32> {
[INFO] [stdout] 6 + fn ops_dangle() -> Vec<i32> {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*borrowed_vec` as mutable, as it is behind a `&` reference
[INFO] [stdout]  --> two/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     borrowed_vec.push(1);
[INFO] [stdout]   |     ^^^^^^^^^^^^ `borrowed_vec` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing this to be a mutable reference
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn put_a_one_into_it_opps(borrowed_vec: &mut Vec<i32>) {
[INFO] [stdout]   |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `vec` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> three/src/main.rs:28:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let ref3 = &vec;
[INFO] [stdout]    |                ---- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 28 |     let ref4 = &mut vec;
[INFO] [stdout]    |                ^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 31 |     let my_sum = sum(ref3); // opps alive
[INFO] [stdout]    |                      ---- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]  --> three/src/main.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn ops_dangle() -> &Vec<i32> {
[INFO] [stdout]   |                    ^ expected named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
[INFO] [stdout] help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn ops_dangle() -> &'static Vec<i32> {
[INFO] [stdout]   |                     +++++++
[INFO] [stdout] help: instead, you are more likely to want to return an owned value
[INFO] [stdout]   |
[INFO] [stdout] 6 - fn ops_dangle() -> &Vec<i32> {
[INFO] [stdout] 6 + fn ops_dangle() -> Vec<i32> {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0106, E0502.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `two` (bin "two") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `three` (bin "three" test) due to 2 previous errors
[INFO] [stdout] error[E0502]: cannot borrow `dynamic_string` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> five/src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let found_o = find_first_char(&dynamic_string, 'o');
[INFO] [stdout]    |                                   --------------- immutable borrow occurs here
[INFO] [stdout] 32 |     dynamic_string.push_str(" -- even more stuff");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 33 |     println!("\nSearching:\n{}", found_o); // oppps ?!?!
[INFO] [stdout]    |                                  ------- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `vec` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> three/src/main.rs:28:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let ref3 = &vec;
[INFO] [stdout]    |                ---- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 28 |     let ref4 = &mut vec;
[INFO] [stdout]    |                ^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 31 |     let my_sum = sum(ref3); // opps alive
[INFO] [stdout]    |                      ---- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: borrow of moved value: `accum`
[INFO] [stdout]   --> four/src/main.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut accum = VecAccumulator::from(&vec![1, 2, 3]);
[INFO] [stdout]    |         --------- move occurs because `accum` has type `VecAccumulator`, which does not implement the `Copy` trait
[INFO] [stdout] ...
[INFO] [stdout] 47 |     let _final_sum = accum.invalidate_me();
[INFO] [stdout]    |                            --------------- `accum` moved due to this method call
[INFO] [stdout] 48 |     accum.print(); // opps
[INFO] [stdout]    |     ^^^^^ value borrowed here after move
[INFO] [stdout]    |
[INFO] [stdout] note: `VecAccumulator::invalidate_me` takes ownership of the receiver `self`, which moves `accum`
[INFO] [stdout]   --> four/src/main.rs:35:22
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn invalidate_me(self) -> i32 {
[INFO] [stdout]    |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0106, E0502.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `dynamic_string` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> five/src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let found_o = find_first_char(&dynamic_string, 'o');
[INFO] [stdout]    |                                   --------------- immutable borrow occurs here
[INFO] [stdout] 32 |     dynamic_string.push_str(" -- even more stuff");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 33 |     println!("\nSearching:\n{}", found_o); // oppps ?!?!
[INFO] [stdout]    |                                  ------- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `five` (bin "five") due to 1 previous error
[INFO] [stdout] error[E0596]: cannot borrow `*borrowed_vec` as mutable, as it is behind a `&` reference
[INFO] [stdout]  --> two/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     borrowed_vec.push(1);
[INFO] [stdout]   |     ^^^^^^^^^^^^ `borrowed_vec` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing this to be a mutable reference
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn put_a_one_into_it_opps(borrowed_vec: &mut Vec<i32>) {
[INFO] [stdout]   |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `five` (bin "five" test) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `four` (bin "four") due to 1 previous error
[INFO] [stderr] error: could not compile `three` (bin "three") due to 2 previous errors
[INFO] [stdout] error[E0382]: borrow of moved value: `accum`
[INFO] [stdout]   --> four/src/main.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut accum = VecAccumulator::from(&vec![1, 2, 3]);
[INFO] [stdout]    |         --------- move occurs because `accum` has type `VecAccumulator`, which does not implement the `Copy` trait
[INFO] [stdout] ...
[INFO] [stdout] 47 |     let _final_sum = accum.invalidate_me();
[INFO] [stdout]    |                            --------------- `accum` moved due to this method call
[INFO] [stdout] 48 |     accum.print(); // opps
[INFO] [stdout]    |     ^^^^^ value borrowed here after move
[INFO] [stdout]    |
[INFO] [stdout] note: `VecAccumulator::invalidate_me` takes ownership of the receiver `self`, which moves `accum`
[INFO] [stdout]   --> four/src/main.rs:35:22
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn invalidate_me(self) -> i32 {
[INFO] [stdout]    |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `two` (bin "two" test) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `four` (bin "four" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "14a00ad0eb7a8c351ef2098718e26f1ecbd067b0a291d5644ca5d044c253a332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14a00ad0eb7a8c351ef2098718e26f1ecbd067b0a291d5644ca5d044c253a332", kill_on_drop: false }`
[INFO] [stdout] 14a00ad0eb7a8c351ef2098718e26f1ecbd067b0a291d5644ca5d044c253a332