[INFO] fetching crate russell_sparse 1.10.0...
[INFO] checking russell_sparse-1.10.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate russell_sparse 1.10.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate russell_sparse 1.10.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate russell_sparse 1.10.0
[INFO] tweaked toml for crates.io crate russell_sparse 1.10.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate russell_sparse 1.10.0 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 crates.io crate russell_sparse 1.10.0 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8dccf16132cd09a4301940264a1f3965a11ffb4d49717235cfd0185c9e6726e4
[INFO] running `Command { std: "docker" "start" "-a" "8dccf16132cd09a4301940264a1f3965a11ffb4d49717235cfd0185c9e6726e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dccf16132cd09a4301940264a1f3965a11ffb4d49717235cfd0185c9e6726e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dccf16132cd09a4301940264a1f3965a11ffb4d49717235cfd0185c9e6726e4", kill_on_drop: false }`
[INFO] [stdout] 8dccf16132cd09a4301940264a1f3965a11ffb4d49717235cfd0185c9e6726e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ee4e8ed0844af5478e1cb235f478909a1c3566fe8ca08aac0e841cddac93900b
[INFO] running `Command { std: "docker" "start" "-a" "ee4e8ed0844af5478e1cb235f478909a1c3566fe8ca08aac0e841cddac93900b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling serde v1.0.199
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking sdd v0.2.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking scc v2.1.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking parking_lot v0.12.2
[INFO] [stderr]    Compiling russell_lab v1.9.2
[INFO] [stderr]    Compiling russell_sparse v1.10.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.199
[INFO] [stderr]    Compiling serial_test_derive v3.1.1
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking serial_test v3.1.1
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]     Checking structopt v0.3.23
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking serde_json v1.0.79
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/nonlinear_system_4eqs.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     #[structopt(short = "g", long, default_value = "Umfpack")]
[INFO] [stdout] 14 | |     genie: String,
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `russell_sparse` (example "nonlinear_system_4eqs") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/solve_matrix_market.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     /// Matrix-market file
[INFO] [stdout] 13 | |     matrix_market_file: String,
[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/bin/solve_matrix_market.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// Solver selection
[INFO] [stdout] 16 | |     #[structopt(short = "g", long, default_value = "Umfpack")]
[INFO] [stdout] 17 | |     genie: String,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/solve_matrix_market.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     /// Ordering strategy
[INFO] [stdout] 20 | |     #[structopt(short = "o", long, default_value = "Auto")]
[INFO] [stdout] 21 | |     ordering: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/solve_matrix_market.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     /// Scaling strategy
[INFO] [stdout] 24 | |     #[structopt(short = "s", long, default_value = "Auto")]
[INFO] [stdout] 25 | |     scaling: String,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `russell_sparse` (bin "solve_matrix_market") due to 4 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/solve_matrix_market.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     /// Matrix-market file
[INFO] [stdout] 13 | |     matrix_market_file: String,
[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/bin/solve_matrix_market.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// Solver selection
[INFO] [stdout] 16 | |     #[structopt(short = "g", long, default_value = "Umfpack")]
[INFO] [stdout] 17 | |     genie: String,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/solve_matrix_market.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     /// Ordering strategy
[INFO] [stdout] 20 | |     #[structopt(short = "o", long, default_value = "Auto")]
[INFO] [stdout] 21 | |     ordering: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/solve_matrix_market.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     /// Scaling strategy
[INFO] [stdout] 24 | |     #[structopt(short = "s", long, default_value = "Auto")]
[INFO] [stdout] 25 | |     scaling: String,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `russell_sparse` (bin "solve_matrix_market" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "ee4e8ed0844af5478e1cb235f478909a1c3566fe8ca08aac0e841cddac93900b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee4e8ed0844af5478e1cb235f478909a1c3566fe8ca08aac0e841cddac93900b", kill_on_drop: false }`
[INFO] [stdout] ee4e8ed0844af5478e1cb235f478909a1c3566fe8ca08aac0e841cddac93900b