[INFO] cloning repository https://github.com/jacoobes/hello_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jacoobes/hello_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacoobes%2Fhello_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacoobes%2Fhello_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aece6325a1b56f45a774f697a8fe9f30545d97ab
[INFO] checking jacoobes/hello_rust against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacoobes%2Fhello_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jacoobes/hello_rust on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jacoobes/hello_rust
[INFO] finished tweaking git repo https://github.com/jacoobes/hello_rust
[INFO] tweaked toml for git repo https://github.com/jacoobes/hello_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jacoobes/hello_rust 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b9efb53bf7934a9ddf1da469285521f695a89c7d5821647132edda0a7b0fde1
[INFO] running `Command { std: "docker" "start" "-a" "4b9efb53bf7934a9ddf1da469285521f695a89c7d5821647132edda0a7b0fde1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b9efb53bf7934a9ddf1da469285521f695a89c7d5821647132edda0a7b0fde1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b9efb53bf7934a9ddf1da469285521f695a89c7d5821647132edda0a7b0fde1", kill_on_drop: false }`
[INFO] [stdout] 4b9efb53bf7934a9ddf1da469285521f695a89c7d5821647132edda0a7b0fde1
[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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bafc5ac27ffc84d71e1e7bdb9c26903bac6d217838169fc56aad2adcdea0cbbc
[INFO] running `Command { std: "docker" "start" "-a" "bafc5ac27ffc84d71e1e7bdb9c26903bac6d217838169fc56aad2adcdea0cbbc", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_world_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `str` as mutable more than once at a time
[INFO] [stdout]   --> src/ownership_borrowing.rs:8:16
[INFO] [stdout]    |
[INFO] [stdout] 7  |     let str2 = &mut str;
[INFO] [stdout]    |                -------- first mutable borrow occurs here
[INFO] [stdout] 8  |     let str3 = &mut str;
[INFO] [stdout]    |                ^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 9  |
[INFO] [stdout] 10 |     println!("{}, {}", str2,str3);
[INFO] [stdout]    |                        ---- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `str` as mutable more than once at a time
[INFO] [stdout]   --> src/ownership_borrowing.rs:8:16
[INFO] [stdout]    |
[INFO] [stdout] 7  |     let str2 = &mut str;
[INFO] [stdout]    |                -------- first mutable borrow occurs here
[INFO] [stdout] 8  |     let str3 = &mut str;
[INFO] [stdout]    |                ^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 9  |
[INFO] [stdout] 10 |     println!("{}, {}", str2,str3);
[INFO] [stdout]    |                        ---- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world_rust` (bin "hello_world_rust") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `hello_world_rust` (bin "hello_world_rust" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bafc5ac27ffc84d71e1e7bdb9c26903bac6d217838169fc56aad2adcdea0cbbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bafc5ac27ffc84d71e1e7bdb9c26903bac6d217838169fc56aad2adcdea0cbbc", kill_on_drop: false }`
[INFO] [stdout] bafc5ac27ffc84d71e1e7bdb9c26903bac6d217838169fc56aad2adcdea0cbbc