[INFO] cloning repository https://github.com/briot/rust_intervals
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/briot/rust_intervals" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriot%2Frust_intervals", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriot%2Frust_intervals'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47667eecad56142d96e24af131b96cdd27529025
[INFO] checking briot/rust_intervals 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%2Fbriot%2Frust_intervals" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/briot/rust_intervals
[INFO] finished tweaking git repo https://github.com/briot/rust_intervals
[INFO] tweaked toml for git repo https://github.com/briot/rust_intervals written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/briot/rust_intervals 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/briot/rust_intervals 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] fc4c086f8d00c64bc08eff531e89ef608d27a2df587528c52ab12065d63299bb
[INFO] running `Command { std: "docker" "start" "-a" "fc4c086f8d00c64bc08eff531e89ef608d27a2df587528c52ab12065d63299bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc4c086f8d00c64bc08eff531e89ef608d27a2df587528c52ab12065d63299bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc4c086f8d00c64bc08eff531e89ef608d27a2df587528c52ab12065d63299bb", kill_on_drop: false }`
[INFO] [stdout] fc4c086f8d00c64bc08eff531e89ef608d27a2df587528c52ab12065d63299bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 6b5f068a8d80accb8175bc10c485c925d69a168f814db26fb33323a43465e9b6
[INFO] running `Command { std: "docker" "start" "-a" "6b5f068a8d80accb8175bc10c485c925d69a168f814db26fb33323a43465e9b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling mutants v0.0.3
[INFO] [stderr]     Checking rust_intervals v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/step.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     Some(d) => d.try_into().ok(),
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 | step_for_int!(u8);
[INFO] [stdout]    | ----------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `step_for_int` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/step.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     Some(d) => d.try_into().ok(),
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 | step_for_int!(u16);
[INFO] [stdout]    | ------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `step_for_int` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/step.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     Some(d) => d.try_into().ok(),
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 | step_for_int!(usize);
[INFO] [stdout]    | -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `step_for_int` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_intervals` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/step.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     Some(d) => d.try_into().ok(),
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 | step_for_int!(u8);
[INFO] [stdout]    | ----------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `step_for_int` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/step.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     Some(d) => d.try_into().ok(),
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 | step_for_int!(u16);
[INFO] [stdout]    | ------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `step_for_int` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/step.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     Some(d) => d.try_into().ok(),
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 | step_for_int!(usize);
[INFO] [stdout]    | -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `step_for_int` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_intervals` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "6b5f068a8d80accb8175bc10c485c925d69a168f814db26fb33323a43465e9b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b5f068a8d80accb8175bc10c485c925d69a168f814db26fb33323a43465e9b6", kill_on_drop: false }`
[INFO] [stdout] 6b5f068a8d80accb8175bc10c485c925d69a168f814db26fb33323a43465e9b6
