[INFO] updating cached repository https://github.com/totechite/rust-snappy-example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 70f145567badc99eb6fd67dbfb3765d4fcdcba05
[INFO] checking totechite/rust-snappy-example against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotechite%2Frust-snappy-example" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/totechite/rust-snappy-example on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/totechite/rust-snappy-example
[INFO] finished tweaking git repo https://github.com/totechite/rust-snappy-example
[INFO] tweaked toml for git repo https://github.com/totechite/rust-snappy-example written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/totechite/rust-snappy-example already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4a5243e7abe1d30a293ea5d6c38032d16676229726061855fd3cf007a6281a72
[INFO] running `"docker" "start" "-a" "4a5243e7abe1d30a293ea5d6c38032d16676229726061855fd3cf007a6281a72"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling practice_rust_ffi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: foreign function is never used: `snappy_compress`
[INFO] [stderr]   --> src/bind_snappy.rs:7:5
[INFO] [stderr]    |
[INFO] [stderr] 7  | /     fn snappy_compress(input: *const u8,
[INFO] [stderr] 8  | |                        input_length: size_t,
[INFO] [stderr] 9  | |                        compressed: *mut u8,
[INFO] [stderr] 10 | |                        compressed_length: *mut size_t) -> c_int;
[INFO] [stderr]    | |________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_uncompress`
[INFO] [stderr]   --> src/bind_snappy.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | /     fn snappy_uncompress(compressed: *const u8,
[INFO] [stderr] 12 | |                          compressed_length: size_t,
[INFO] [stderr] 13 | |                          uncompressed: *mut u8,
[INFO] [stderr] 14 | |                          uncompressed_length: *mut size_t) -> c_int;
[INFO] [stderr]    | |____________________________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_uncompressed_length`
[INFO] [stderr]   --> src/bind_snappy.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     fn snappy_uncompressed_length(compressed: *const u8,
[INFO] [stderr] 17 | |                                   compressed_length: size_t,
[INFO] [stderr] 18 | |                                   result: *mut size_t) -> c_int;
[INFO] [stderr]    | |________________________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_validate_compressed_buffer`
[INFO] [stderr]   --> src/bind_snappy.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | /     fn snappy_validate_compressed_buffer(compressed: *const u8,
[INFO] [stderr] 20 | |                                          compressed_length: size_t) -> c_int;
[INFO] [stderr]    | |_____________________________________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compress`
[INFO] [stderr]   --> src/bind_snappy.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn compress(src: &[u8]) -> Vec<u8> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `uncompress`
[INFO] [stderr]   --> src/bind_snappy.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn uncompress(src: &[u8]) -> Option<Vec<u8>> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `validate_compressed_buffer`
[INFO] [stderr]   --> src/bind_snappy.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn validate_compressed_buffer(src: &[u8]) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_compress`
[INFO] [stderr]   --> src/bind_snappy.rs:7:5
[INFO] [stderr]    |
[INFO] [stderr] 7  | /     fn snappy_compress(input: *const u8,
[INFO] [stderr] 8  | |                        input_length: size_t,
[INFO] [stderr] 9  | |                        compressed: *mut u8,
[INFO] [stderr] 10 | |                        compressed_length: *mut size_t) -> c_int;
[INFO] [stderr]    | |________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_uncompress`
[INFO] [stderr]   --> src/bind_snappy.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | /     fn snappy_uncompress(compressed: *const u8,
[INFO] [stderr] 12 | |                          compressed_length: size_t,
[INFO] [stderr] 13 | |                          uncompressed: *mut u8,
[INFO] [stderr] 14 | |                          uncompressed_length: *mut size_t) -> c_int;
[INFO] [stderr]    | |____________________________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_uncompressed_length`
[INFO] [stderr]   --> src/bind_snappy.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     fn snappy_uncompressed_length(compressed: *const u8,
[INFO] [stderr] 17 | |                                   compressed_length: size_t,
[INFO] [stderr] 18 | |                                   result: *mut size_t) -> c_int;
[INFO] [stderr]    | |________________________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `snappy_validate_compressed_buffer`
[INFO] [stderr]   --> src/bind_snappy.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | /     fn snappy_validate_compressed_buffer(compressed: *const u8,
[INFO] [stderr] 20 | |                                          compressed_length: size_t) -> c_int;
[INFO] [stderr]    | |_____________________________________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compress`
[INFO] [stderr]   --> src/bind_snappy.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn compress(src: &[u8]) -> Vec<u8> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `uncompress`
[INFO] [stderr]   --> src/bind_snappy.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn uncompress(src: &[u8]) -> Option<Vec<u8>> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `validate_compressed_buffer`
[INFO] [stderr]   --> src/bind_snappy.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn validate_compressed_buffer(src: &[u8]) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.36s
[INFO] running `"docker" "inspect" "4a5243e7abe1d30a293ea5d6c38032d16676229726061855fd3cf007a6281a72"`
[INFO] running `"docker" "rm" "-f" "4a5243e7abe1d30a293ea5d6c38032d16676229726061855fd3cf007a6281a72"`
[INFO] [stdout] 4a5243e7abe1d30a293ea5d6c38032d16676229726061855fd3cf007a6281a72