[INFO] fetching crate os_type 2.2.0...
[INFO] checking os_type-2.2.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate os_type 2.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate os_type 2.2.0 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate os_type 2.2.0
[INFO] finished tweaking crates.io crate os_type 2.2.0
[INFO] tweaked toml for crates.io crate os_type 2.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7d8fcac29a8fbe19fe54fd234376e011c874649e4ff7c19bf26259c163eff47
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b7d8fcac29a8fbe19fe54fd234376e011c874649e4ff7c19bf26259c163eff47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7d8fcac29a8fbe19fe54fd234376e011c874649e4ff7c19bf26259c163eff47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7d8fcac29a8fbe19fe54fd234376e011c874649e4ff7c19bf26259c163eff47", kill_on_drop: false }`
[INFO] [stdout] b7d8fcac29a8fbe19fe54fd234376e011c874649e4ff7c19bf26259c163eff47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df044dd773c8bdc1c54b455995e993d7bb5c63f8e5c2a78a77418535de819c2d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "df044dd773c8bdc1c54b455995e993d7bb5c63f8e5c2a78a77418535de819c2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking os_type v2.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/os_release.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `WindowsVer`
[INFO] [stdout]  --> src/windows_ver.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct WindowsVer {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retrieve`
[INFO] [stdout]  --> src/windows_ver.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn retrieve() -> Option<WindowsVer> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse`
[INFO] [stdout]   --> src/windows_ver.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn parse(output: String) -> WindowsVer {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_os_x`
[INFO] [stdout]   --> src/sw_vers.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn is_os_x() -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `WindowsVer`
[INFO] [stdout]  --> src/windows_ver.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct WindowsVer {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retrieve`
[INFO] [stdout]  --> src/windows_ver.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn retrieve() -> Option<WindowsVer> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse`
[INFO] [stdout]   --> src/windows_ver.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn parse(output: String) -> WindowsVer {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_os_x`
[INFO] [stdout]   --> src/sw_vers.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn is_os_x() -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file`
[INFO] [stdout]   --> tests/../src/rhel_release.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn read_file(filename: &str) -> Result<String, Error> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retrieve`
[INFO] [stdout]   --> tests/../src/rhel_release.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn retrieve() -> Option<RHELRelease> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_exists`
[INFO] [stdout]  --> tests/../src/utils.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn file_exists<P: AsRef<Path>>(path: P) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_os_x`
[INFO] [stdout]   --> tests/../src/sw_vers.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn is_os_x() -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retrieve`
[INFO] [stdout]   --> tests/../src/sw_vers.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn retrieve() -> Option<SwVers> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_exists`
[INFO] [stdout]  --> tests/../src/utils.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn file_exists<P: AsRef<Path>>(path: P) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retrieve`
[INFO] [stdout]  --> tests/../src/lsb_release.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn retrieve() -> Option<LsbRelease> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_available`
[INFO] [stdout]   --> tests/../src/lsb_release.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn is_available() -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_exists`
[INFO] [stdout]  --> tests/../src/utils.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn file_exists<P: AsRef<Path>>(path: P) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.79s
[INFO] running `Command { std: "docker" "inspect" "df044dd773c8bdc1c54b455995e993d7bb5c63f8e5c2a78a77418535de819c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df044dd773c8bdc1c54b455995e993d7bb5c63f8e5c2a78a77418535de819c2d", kill_on_drop: false }`
[INFO] [stdout] df044dd773c8bdc1c54b455995e993d7bb5c63f8e5c2a78a77418535de819c2d