[INFO] fetching crate min_err_per_step 0.0.204...
[INFO] checking min_err_per_step-0.0.204 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate min_err_per_step 0.0.204 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate min_err_per_step 0.0.204
[INFO] finished tweaking crates.io crate min_err_per_step 0.0.204
[INFO] tweaked toml for crates.io crate min_err_per_step 0.0.204 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate min_err_per_step 0.0.204 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 min_err_per_step 0.0.204 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] 2bdb638b39b718e5e84a8da6e966842f8d86919f68ea587c64ae48071393d6aa
[INFO] running `Command { std: "docker" "start" "-a" "2bdb638b39b718e5e84a8da6e966842f8d86919f68ea587c64ae48071393d6aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2bdb638b39b718e5e84a8da6e966842f8d86919f68ea587c64ae48071393d6aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bdb638b39b718e5e84a8da6e966842f8d86919f68ea587c64ae48071393d6aa", kill_on_drop: false }`
[INFO] [stdout] 2bdb638b39b718e5e84a8da6e966842f8d86919f68ea587c64ae48071393d6aa
[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] 5fc245bf96649d811bd92739182583cef3ffaddc26ce9d1e0e6836a8b8f7c3bb
[INFO] running `Command { std: "docker" "start" "-a" "5fc245bf96649d811bd92739182583cef3ffaddc26ce9d1e0e6836a8b8f7c3bb", kill_on_drop: false }`
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.8
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]     Checking bitflags v2.9.4
[INFO] [stderr]    Compiling rug v1.28.0
[INFO] [stderr]    Compiling CuPs v0.0.5
[INFO] [stderr]    Compiling min_err_per_step v0.0.204 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling substring v1.4.5
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]     Checking unic-ucd-hangul v0.9.0
[INFO] [stderr]     Checking unic-ucd-category v0.9.0
[INFO] [stderr]     Checking unic-ucd-age v0.9.0
[INFO] [stderr]     Checking unic-ucd-name_aliases v0.9.0
[INFO] [stderr]     Checking unic-ucd-ident v0.9.0
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]     Checking unic-ucd-common v0.9.0
[INFO] [stderr]     Checking unic-ucd-case v0.9.0
[INFO] [stderr]     Checking unic-ucd-block v0.9.0
[INFO] [stderr]     Checking unic-ucd-segment v0.9.0
[INFO] [stderr]     Checking unic-ucd-name v0.9.0
[INFO] [stderr]     Checking unic-ucd-normal v0.9.0
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking unic-ucd v0.9.0
[INFO] [stderr]     Checking Mademoiselle_Entropia v1.11.19
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:129:23
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let symb_ = match u32::try_from (symb) {
[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<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:154:22
[INFO] [stdout]     |
[INFO] [stdout] 154 |    let symb_ = match u32::try_from (symb) {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:188:22
[INFO] [stdout]     |
[INFO] [stdout] 188 |    let symb_ = match u32::try_from (symb) {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:224:22
[INFO] [stdout]     |
[INFO] [stdout] 224 |    let symb_ = match u32::try_from (symb) {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `min_err_per_step` (lib test) due to 4 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<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:129:23
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let symb_ = match u32::try_from (symb) {
[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<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:154:22
[INFO] [stdout]     |
[INFO] [stdout] 154 |    let symb_ = match u32::try_from (symb) {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:188:22
[INFO] [stdout]     |
[INFO] [stdout] 188 |    let symb_ = match u32::try_from (symb) {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/editing.rs:224:22
[INFO] [stdout]     |
[INFO] [stdout] 224 |    let symb_ = match u32::try_from (symb) {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `min_err_per_step` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "5fc245bf96649d811bd92739182583cef3ffaddc26ce9d1e0e6836a8b8f7c3bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fc245bf96649d811bd92739182583cef3ffaddc26ce9d1e0e6836a8b8f7c3bb", kill_on_drop: false }`
[INFO] [stdout] 5fc245bf96649d811bd92739182583cef3ffaddc26ce9d1e0e6836a8b8f7c3bb