[INFO] fetching crate os_type 2.2.0...
[INFO] checking os_type-2.2.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate os_type 2.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate os_type 2.2.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 95c9dce5ffb09047a68f1f5cf37c690a073eb71ca538fdfe608d698734f30c98
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "95c9dce5ffb09047a68f1f5cf37c690a073eb71ca538fdfe608d698734f30c98"`
[INFO] [stderr]     Checking os_type v2.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/os_release.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `WindowsVer`
[INFO] [stderr]  --> src/windows_ver.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct WindowsVer {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `retrieve`
[INFO] [stderr]  --> src/windows_ver.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn retrieve() -> Option<WindowsVer> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse`
[INFO] [stderr]   --> src/windows_ver.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn parse(output: String) -> WindowsVer {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_os_x`
[INFO] [stderr]   --> src/sw_vers.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn is_os_x() -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `WindowsVer`
[INFO] [stderr]  --> src/windows_ver.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct WindowsVer {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `retrieve`
[INFO] [stderr]  --> src/windows_ver.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn retrieve() -> Option<WindowsVer> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse`
[INFO] [stderr]   --> src/windows_ver.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn parse(output: String) -> WindowsVer {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_os_x`
[INFO] [stderr]   --> src/sw_vers.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn is_os_x() -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_file`
[INFO] [stderr]   --> tests/../src/rhel_release.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn read_file(filename: &str) -> Result<String, Error> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `retrieve`
[INFO] [stderr]   --> tests/../src/rhel_release.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn retrieve() -> Option<RHELRelease> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_exists`
[INFO] [stderr]  --> tests/../src/utils.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_exists<P: AsRef<Path>>(path: P) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_os_x`
[INFO] [stderr]   --> tests/../src/sw_vers.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn is_os_x() -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `retrieve`
[INFO] [stderr]   --> tests/../src/sw_vers.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn retrieve() -> Option<SwVers> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_exists`
[INFO] [stderr]  --> tests/../src/utils.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_exists<P: AsRef<Path>>(path: P) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `retrieve`
[INFO] [stderr]  --> tests/../src/lsb_release.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn retrieve() -> Option<LsbRelease> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_available`
[INFO] [stderr]   --> tests/../src/lsb_release.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn is_available() -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_exists`
[INFO] [stderr]  --> tests/../src/utils.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_exists<P: AsRef<Path>>(path: P) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "95c9dce5ffb09047a68f1f5cf37c690a073eb71ca538fdfe608d698734f30c98"`
[INFO] running `"docker" "rm" "-f" "95c9dce5ffb09047a68f1f5cf37c690a073eb71ca538fdfe608d698734f30c98"`
[INFO] [stdout] 95c9dce5ffb09047a68f1f5cf37c690a073eb71ca538fdfe608d698734f30c98