[INFO] cloning repository https://github.com/marcus302/bin_photos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marcus302/bin_photos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcus302%2Fbin_photos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcus302%2Fbin_photos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0693986dcd425b5abd9f640f5364f68cbf8085d
[INFO] checking marcus302/bin_photos against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcus302%2Fbin_photos" "/workspace/builds/worker-88/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-88/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marcus302/bin_photos on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/marcus302/bin_photos
[INFO] finished tweaking git repo https://github.com/marcus302/bin_photos
[INFO] tweaked toml for git repo https://github.com/marcus302/bin_photos written to /workspace/builds/worker-88/source/Cargo.toml
[INFO] crate git repo https://github.com/marcus302/bin_photos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "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-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35a6ae8b464be81c2fe760adef389fc862a62640e1b132754bc6f30347b7bcf9
[INFO] running `Command { std: "docker" "start" "-a" "35a6ae8b464be81c2fe760adef389fc862a62640e1b132754bc6f30347b7bcf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35a6ae8b464be81c2fe760adef389fc862a62640e1b132754bc6f30347b7bcf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35a6ae8b464be81c2fe760adef389fc862a62640e1b132754bc6f30347b7bcf9", kill_on_drop: false }`
[INFO] [stdout] 35a6ae8b464be81c2fe760adef389fc862a62640e1b132754bc6f30347b7bcf9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09e17be1566ae6cc5ab38fcbd7d5f0ef952b2c5843825758959a72a3f18ed6bd
[INFO] running `Command { std: "docker" "start" "-a" "09e17be1566ae6cc5ab38fcbd7d5f0ef952b2c5843825758959a72a3f18ed6bd", kill_on_drop: false }`
[INFO] [stderr]     Checking bin_photos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `class`
[INFO] [stdout]   --> src/main.rs:12:17
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut class = String::new();
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_class`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut class = String::new();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `class` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:9:24
[INFO] [stdout]    |
[INFO] [stdout] 9  |             .read_line(&mut class)
[INFO] [stdout]    |                        ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 10 |             .expect("Failed to read line.");
[INFO] [stdout] 11 |         classes[iter] = class.trim();
[INFO] [stdout]    |         -------         ----- immutable borrow occurs here
[INFO] [stdout]    |         |
[INFO] [stdout]    |         immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bin_photos` due to 2 previous errors; 2 warnings emitted
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `class`
[INFO] [stdout]   --> src/main.rs:12:17
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut class = String::new();
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_class`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut class = String::new();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `class` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:9:24
[INFO] [stdout]    |
[INFO] [stdout] 9  |             .read_line(&mut class)
[INFO] [stdout]    |                        ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 10 |             .expect("Failed to read line.");
[INFO] [stdout] 11 |         classes[iter] = class.trim();
[INFO] [stdout]    |         -------         ----- immutable borrow occurs here
[INFO] [stdout]    |         |
[INFO] [stdout]    |         immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "09e17be1566ae6cc5ab38fcbd7d5f0ef952b2c5843825758959a72a3f18ed6bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09e17be1566ae6cc5ab38fcbd7d5f0ef952b2c5843825758959a72a3f18ed6bd", kill_on_drop: false }`
[INFO] [stdout] 09e17be1566ae6cc5ab38fcbd7d5f0ef952b2c5843825758959a72a3f18ed6bd