[INFO] cloning repository https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspeederking07%2FAdaptive_arithmetic_coding_with_scaling", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspeederking07%2FAdaptive_arithmetic_coding_with_scaling'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cb0d2fb6a926207e2805b22772ec0fad2dd7f62e
[INFO] checking speederking07/Adaptive_arithmetic_coding_with_scaling against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspeederking07%2FAdaptive_arithmetic_coding_with_scaling" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling
[INFO] finished tweaking git repo https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling
[INFO] tweaked toml for git repo https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/speederking07/Adaptive_arithmetic_coding_with_scaling 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37e259a3c87b10abc9fe40fd27d723ffeb588218875bc7780a801cd7b1a22d2e
[INFO] running `Command { std: "docker" "start" "-a" "37e259a3c87b10abc9fe40fd27d723ffeb588218875bc7780a801cd7b1a22d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37e259a3c87b10abc9fe40fd27d723ffeb588218875bc7780a801cd7b1a22d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37e259a3c87b10abc9fe40fd27d723ffeb588218875bc7780a801cd7b1a22d2e", kill_on_drop: false }`
[INFO] [stdout] 37e259a3c87b10abc9fe40fd27d723ffeb588218875bc7780a801cd7b1a22d2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb382f127c989d889b0455bc2ee63ca0aced6fb99466831c76b44ba54bc56747
[INFO] running `Command { std: "docker" "start" "-a" "bb382f127c989d889b0455bc2ee63ca0aced6fb99466831c76b44ba54bc56747", kill_on_drop: false }`
[INFO] [stderr]     Checking arithmetic_coder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:154:35
[INFO] [stdout]     |
[INFO] [stdout] 154 |             Err(_e) => return Err("Unable to open file".parse().unwrap())
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:162:35
[INFO] [stdout]     |
[INFO] [stdout] 162 |             Err(_e) => return Err("Unable to save file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:167:35
[INFO] [stdout]     |
[INFO] [stdout] 167 |             Err(_e) => return Err("Unable to save file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:171:35
[INFO] [stdout]     |
[INFO] [stdout] 171 |             Err(_e) => return Err("Unable to save file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:181:35
[INFO] [stdout]     |
[INFO] [stdout] 181 |             Err(_e) => return Err("Unable to open file".parse().unwrap())
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:185:35
[INFO] [stdout]     |
[INFO] [stdout] 185 |             Err(_e) => return Err("Unable to read file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:154:35
[INFO] [stdout]     |
[INFO] [stdout] 154 |             Err(_e) => return Err("Unable to open file".parse().unwrap())
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:162:35
[INFO] [stdout]     |
[INFO] [stdout] 162 |             Err(_e) => return Err("Unable to save file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:167:35
[INFO] [stdout]     |
[INFO] [stdout] 167 |             Err(_e) => return Err("Unable to save file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:171:35
[INFO] [stdout]     |
[INFO] [stdout] 171 |             Err(_e) => return Err("Unable to save file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:181:35
[INFO] [stdout]     |
[INFO] [stdout] 181 |             Err(_e) => return Err("Unable to open file".parse().unwrap())
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:185:35
[INFO] [stdout]     |
[INFO] [stdout] 185 |             Err(_e) => return Err("Unable to read file".parse().unwrap()),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arithmetic_coder` (bin "arithmetic_coder" test) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `arithmetic_coder` (bin "arithmetic_coder") due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "bb382f127c989d889b0455bc2ee63ca0aced6fb99466831c76b44ba54bc56747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb382f127c989d889b0455bc2ee63ca0aced6fb99466831c76b44ba54bc56747", kill_on_drop: false }`
[INFO] [stdout] bb382f127c989d889b0455bc2ee63ca0aced6fb99466831c76b44ba54bc56747
