[INFO] fetching crate dev_utils 0.1.4...
[INFO] checking dev_utils-0.1.4 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate dev_utils 0.1.4 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate dev_utils 0.1.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate dev_utils 0.1.4
[INFO] tweaked toml for crates.io crate dev_utils 0.1.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dev_utils 0.1.4 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dev_utils 0.1.4 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f581fd6f6385af32818acb0cd8384e573f03bfb6a17176d3f347010a4dcd9512
[INFO] running `Command { std: "docker" "start" "-a" "f581fd6f6385af32818acb0cd8384e573f03bfb6a17176d3f347010a4dcd9512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f581fd6f6385af32818acb0cd8384e573f03bfb6a17176d3f347010a4dcd9512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f581fd6f6385af32818acb0cd8384e573f03bfb6a17176d3f347010a4dcd9512", kill_on_drop: false }`
[INFO] [stdout] f581fd6f6385af32818acb0cd8384e573f03bfb6a17176d3f347010a4dcd9512
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a40ef5b642a79bce828753f93b111b582dee54c134aabd45cd6e41a26a413d53
[INFO] running `Command { std: "docker" "start" "-a" "a40ef5b642a79bce828753f93b111b582dee54c134aabd45cd6e41a26a413d53", kill_on_drop: false }`
[INFO] [stderr]     Checking dev_utils v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `showcase_advanced_conversions` is never used
[INFO] [stdout]   --> examples/base_change.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn showcase_advanced_conversions() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `showcase_precision` is never used
[INFO] [stdout]    --> examples/base_change.rs:128:4
[INFO] [stdout]     |
[INFO] [stdout] 128 | fn showcase_precision() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `showcase_log_levels` is never used
[INFO] [stdout]   --> examples/dlog.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn showcase_log_levels() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `showcase_log_formatting` is never used
[INFO] [stdout]   --> examples/dlog.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn showcase_log_formatting() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `showcase_log_use_cases` is never used
[INFO] [stdout]    --> examples/dlog.rs:187:4
[INFO] [stdout]     |
[INFO] [stdout] 187 | fn showcase_log_use_cases() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `showcase_datetime_features` is never used
[INFO] [stdout]    --> examples/dlog.rs:227:4
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn showcase_datetime_features() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "a40ef5b642a79bce828753f93b111b582dee54c134aabd45cd6e41a26a413d53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a40ef5b642a79bce828753f93b111b582dee54c134aabd45cd6e41a26a413d53", kill_on_drop: false }`
[INFO] [stdout] a40ef5b642a79bce828753f93b111b582dee54c134aabd45cd6e41a26a413d53