[INFO] cloning repository https://github.com/VasilStoianov/rust-compare-json-files
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VasilStoianov/rust-compare-json-files" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVasilStoianov%2Frust-compare-json-files", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVasilStoianov%2Frust-compare-json-files'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 562682fbb5b5edb5073551f8fbf87bf6acc74a97
[INFO] checking VasilStoianov/rust-compare-json-files 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%2FVasilStoianov%2Frust-compare-json-files" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/VasilStoianov/rust-compare-json-files
[INFO] finished tweaking git repo https://github.com/VasilStoianov/rust-compare-json-files
[INFO] tweaked toml for git repo https://github.com/VasilStoianov/rust-compare-json-files written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/VasilStoianov/rust-compare-json-files 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/VasilStoianov/rust-compare-json-files 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 47b789e760d7d45db2783dc1e85bc6980b366fe936a62db08be396ccaa47d8b4
[INFO] running `Command { std: "docker" "start" "-a" "47b789e760d7d45db2783dc1e85bc6980b366fe936a62db08be396ccaa47d8b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47b789e760d7d45db2783dc1e85bc6980b366fe936a62db08be396ccaa47d8b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47b789e760d7d45db2783dc1e85bc6980b366fe936a62db08be396ccaa47d8b4", kill_on_drop: false }`
[INFO] [stdout] 47b789e760d7d45db2783dc1e85bc6980b366fe936a62db08be396ccaa47d8b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 038dd9eb97c7eca4b9a625d80283c620a944886a9b7a3c3ae32cc70e207fae48
[INFO] running `Command { std: "docker" "start" "-a" "038dd9eb97c7eca4b9a625d80283c620a944886a9b7a3c3ae32cc70e207fae48", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.140
[INFO] [stderr]    Compiling serde_json v1.0.82
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking json-comparer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `take_file_paths` is never used
[INFO] [stdout]   --> src/main.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn take_file_paths(path: &Path, vec: &mut Vec<String>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |             None => String::from_str("no file").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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:39:25
[INFO] [stdout]    |
[INFO] [stdout] 39 |                 None => String::from_str("no file").unwrap(),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:64:21
[INFO] [stdout]    |
[INFO] [stdout] 64 |             None => String::from_str("no file").unwrap(),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_file_paths` is never used
[INFO] [stdout]   --> src/main.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn take_file_paths(path: &Path, vec: &mut Vec<String>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |             None => String::from_str("no file").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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:39:25
[INFO] [stdout]    |
[INFO] [stdout] 39 |                 None => String::from_str("no file").unwrap(),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json-comparer` (bin "json-comparer") due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:64:21
[INFO] [stdout]    |
[INFO] [stdout] 64 |             None => String::from_str("no file").unwrap(),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json-comparer` (bin "json-comparer" test) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "038dd9eb97c7eca4b9a625d80283c620a944886a9b7a3c3ae32cc70e207fae48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "038dd9eb97c7eca4b9a625d80283c620a944886a9b7a3c3ae32cc70e207fae48", kill_on_drop: false }`
[INFO] [stdout] 038dd9eb97c7eca4b9a625d80283c620a944886a9b7a3c3ae32cc70e207fae48