[INFO] fetching crate dt-core 0.7.9...
[INFO] checking dt-core-0.7.9 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate dt-core 0.7.9 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate dt-core 0.7.9
[INFO] finished tweaking crates.io crate dt-core 0.7.9
[INFO] tweaked toml for crates.io crate dt-core 0.7.9 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dt-core 0.7.9 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 113 packages to latest compatible versions
[INFO] [stderr]       Adding dirs v4.0.0 (available: v6.0.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding gethostname v0.2.3 (available: v1.1.0)
[INFO] [stderr]       Adding handlebars v4.5.0 (available: v6.3.2)
[INFO] [stderr]       Adding path-clean v0.1.0 (available: v1.0.1)
[INFO] [stderr]       Adding serde_tuple v0.5.0 (available: v1.1.3)
[INFO] [stderr]       Adding shellexpand v2.1.2 (available: v3.1.1)
[INFO] [stderr]       Adding toml v0.5.11 (available: v0.9.8)
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8db2efccdf73c52c116661a96d6c75b2ebe5d28ec37d9f595b0dbaf08feca4e9
[INFO] running `Command { std: "docker" "start" "-a" "8db2efccdf73c52c116661a96d6c75b2ebe5d28ec37d9f595b0dbaf08feca4e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8db2efccdf73c52c116661a96d6c75b2ebe5d28ec37d9f595b0dbaf08feca4e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8db2efccdf73c52c116661a96d6c75b2ebe5d28ec37d9f595b0dbaf08feca4e9", kill_on_drop: false }`
[INFO] [stdout] 8db2efccdf73c52c116661a96d6c75b2ebe5d28ec37d9f595b0dbaf08feca4e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 0027da6734589817807f03c2aff21d6155c7b3d440f089193672672470ee01e0
[INFO] running `Command { std: "docker" "start" "-a" "0027da6734589817807f03c2aff21d6155c7b3d440f089193672672470ee01e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling sys-info v0.9.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking pest v2.8.3
[INFO] [stderr]     Checking users v0.11.0
[INFO] [stderr]     Checking gethostname v0.2.3
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]     Checking path-clean v0.1.0
[INFO] [stderr]     Checking backtrace v0.3.76
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking shellexpand v2.1.2
[INFO] [stderr]     Checking color-eyre v0.6.5
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling pest_generator v2.8.3
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.1
[INFO] [stderr]    Compiling zerovec-derive v0.11.2
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling pest_derive v2.8.3
[INFO] [stderr]     Checking zerofrom v0.1.6
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking yoke v0.8.1
[INFO] [stderr]     Checking zerotrie v0.2.3
[INFO] [stderr]     Checking zerovec v0.11.5
[INFO] [stderr]    Compiling serde_tuple_macros v0.5.0
[INFO] [stderr]     Checking tinystr v0.8.2
[INFO] [stderr]     Checking potential_utf v0.1.4
[INFO] [stderr]     Checking icu_collections v2.1.1
[INFO] [stderr]     Checking icu_locale_core v2.1.1
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking icu_provider v2.1.1
[INFO] [stderr]     Checking icu_properties v2.1.1
[INFO] [stderr]     Checking icu_normalizer v2.1.1
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking serde_regex v1.1.0
[INFO] [stderr]     Checking handlebars v4.5.0
[INFO] [stderr]     Checking serde_tuple v0.5.0
[INFO] [stderr]     Checking idna_adapter v1.2.1
[INFO] [stderr]     Checking idna v1.1.0
[INFO] [stderr]     Checking url v2.5.7
[INFO] [stderr]     Checking dt-core v0.7.9 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/config.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |         } else if self.0 == PathBuf::from_str("").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: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:394:17
[INFO] [stdout]     |
[INFO] [stdout] 394 |                 PathBuf::from_str(&shellexpand::tilde(&staging.0.to_string_lossy())).unwrap(),
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:401:43
[INFO] [stdout]     |
[INFO] [stdout] 401 |             group.base = if group.base == PathBuf::from_str("").unwrap() {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:405:17
[INFO] [stdout]     |
[INFO] [stdout] 405 |                 PathBuf::from_str(&shellexpand::tilde(&group.base.to_string_lossy())).unwrap()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:409:47
[INFO] [stdout]     |
[INFO] [stdout] 409 |             group.target = if group.target == PathBuf::from_str("").unwrap() {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:413:17
[INFO] [stdout]     |
[INFO] [stdout] 413 |                 PathBuf::from_str(&shellexpand::tilde(&group.target.to_string_lossy())).unwrap()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dt-core` (lib) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/config.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |         } else if self.0 == PathBuf::from_str("").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: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:394:17
[INFO] [stdout]     |
[INFO] [stdout] 394 |                 PathBuf::from_str(&shellexpand::tilde(&staging.0.to_string_lossy())).unwrap(),
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:401:43
[INFO] [stdout]     |
[INFO] [stdout] 401 |             group.base = if group.base == PathBuf::from_str("").unwrap() {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:405:17
[INFO] [stdout]     |
[INFO] [stdout] 405 |                 PathBuf::from_str(&shellexpand::tilde(&group.base.to_string_lossy())).unwrap()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:409:47
[INFO] [stdout]     |
[INFO] [stdout] 409 |             group.target = if group.target == PathBuf::from_str("").unwrap() {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/config.rs:413:17
[INFO] [stdout]     |
[INFO] [stdout] 413 |                 PathBuf::from_str(&shellexpand::tilde(&group.target.to_string_lossy())).unwrap()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:428:25
[INFO] [stdout]     |
[INFO] [stdout] 428 |                         PathBuf::from_str("../dt-cli/Cargo.toml")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:431:25
[INFO] [stdout]     |
[INFO] [stdout] 431 |                         PathBuf::from_str("../dt-cli/README.md")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:434:25
[INFO] [stdout]     |
[INFO] [stdout] 434 |                         PathBuf::from_str("../dt-cli/src/main.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:437:25
[INFO] [stdout]     |
[INFO] [stdout] 437 |                         PathBuf::from_str("../dt-core/Cargo.toml")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:440:25
[INFO] [stdout]     |
[INFO] [stdout] 440 |                         PathBuf::from_str("../dt-core/README.md")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:443:25
[INFO] [stdout]     |
[INFO] [stdout] 443 |                         PathBuf::from_str("../dt-core/src/config.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:446:25
[INFO] [stdout]     |
[INFO] [stdout] 446 |                         PathBuf::from_str("../dt-core/src/error.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:449:25
[INFO] [stdout]     |
[INFO] [stdout] 449 |                         PathBuf::from_str("../dt-core/src/item.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:452:25
[INFO] [stdout]     |
[INFO] [stdout] 452 |                         PathBuf::from_str("../dt-core/src/lib.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:455:25
[INFO] [stdout]     |
[INFO] [stdout] 455 |                         PathBuf::from_str("../dt-core/src/registry.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:458:25
[INFO] [stdout]     |
[INFO] [stdout] 458 |                         PathBuf::from_str("../dt-core/src/syncing.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/syncing.rs:461:25
[INFO] [stdout]     |
[INFO] [stdout] 461 |                         PathBuf::from_str("../dt-core/src/utils.rs")
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/utils.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         PathBuf::from_str(TESTROOT).unwrap().join(top_level)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dt-core` (lib test) due to 19 previous errors
[INFO] running `Command { std: "docker" "inspect" "0027da6734589817807f03c2aff21d6155c7b3d440f089193672672470ee01e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0027da6734589817807f03c2aff21d6155c7b3d440f089193672672470ee01e0", kill_on_drop: false }`
[INFO] [stdout] 0027da6734589817807f03c2aff21d6155c7b3d440f089193672672470ee01e0