[INFO] cloning repository https://github.com/totechite/rust-snappy-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/totechite/rust-snappy-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotechite%2Frust-snappy-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotechite%2Frust-snappy-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70f145567badc99eb6fd67dbfb3765d4fcdcba05
[INFO] testing totechite/rust-snappy-example against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotechite%2Frust-snappy-example" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/totechite/rust-snappy-example on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-1/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0540dc342821a86f11724f8ce64a2590b2068209cd964081b969797e4ca8e298
[INFO] running `Command { std: "docker" "start" "-a" "0540dc342821a86f11724f8ce64a2590b2068209cd964081b969797e4ca8e298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0540dc342821a86f11724f8ce64a2590b2068209cd964081b969797e4ca8e298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0540dc342821a86f11724f8ce64a2590b2068209cd964081b969797e4ca8e298", kill_on_drop: false }`
[INFO] [stdout] 0540dc342821a86f11724f8ce64a2590b2068209cd964081b969797e4ca8e298
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0cf5a638390002e107c6c360106ce8923c02d2b2ce337a75edbd21678b599bd8
[INFO] running `Command { std: "docker" "start" "-a" "0cf5a638390002e107c6c360106ce8923c02d2b2ce337a75edbd21678b599bd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling practice_rust_ffi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `snappy_compress`
[INFO] [stdout]   --> src/bind_snappy.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | /     fn snappy_compress(input: *const u8,
[INFO] [stdout] 8  | |                        input_length: size_t,
[INFO] [stdout] 9  | |                        compressed: *mut u8,
[INFO] [stdout] 10 | |                        compressed_length: *mut size_t) -> c_int;
[INFO] [stdout]    | |________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `snappy_uncompress`
[INFO] [stdout]   --> src/bind_snappy.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     fn snappy_uncompress(compressed: *const u8,
[INFO] [stdout] 12 | |                          compressed_length: size_t,
[INFO] [stdout] 13 | |                          uncompressed: *mut u8,
[INFO] [stdout] 14 | |                          uncompressed_length: *mut size_t) -> c_int;
[INFO] [stdout]    | |____________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `snappy_uncompressed_length`
[INFO] [stdout]   --> src/bind_snappy.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     fn snappy_uncompressed_length(compressed: *const u8,
[INFO] [stdout] 17 | |                                   compressed_length: size_t,
[INFO] [stdout] 18 | |                                   result: *mut size_t) -> c_int;
[INFO] [stdout]    | |________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `snappy_validate_compressed_buffer`
[INFO] [stdout]   --> src/bind_snappy.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     fn snappy_validate_compressed_buffer(compressed: *const u8,
[INFO] [stdout] 20 | |                                          compressed_length: size_t) -> c_int;
[INFO] [stdout]    | |_____________________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compress`
[INFO] [stdout]   --> src/bind_snappy.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn compress(src: &[u8]) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `uncompress`
[INFO] [stdout]   --> src/bind_snappy.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn uncompress(src: &[u8]) -> Option<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `validate_compressed_buffer`
[INFO] [stdout]   --> src/bind_snappy.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn validate_compressed_buffer(src: &[u8]) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.practice_rust_ffi.0d0ac833-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9.19ev0dfabejah9n5.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lsnappy" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-5b90a971773db2ec.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9a950938f3668a37.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-3b1b529ec96b3df7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-ac333df4e6839cea.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-22a9ff9d2be6d427.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-5decbb94c7d60860.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-29a9663b62a1cd00.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-6f0cee0dbab2d3f8.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-f5dc7d1d28c5c249.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-d19bda9ef557e755.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-82a955fd13db2399.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-44f3e7c1b7cc17ef.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-3ee6f750c5f3c2cf.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-ae5e1795dcba83e8.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-8d545d8592f2b534.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-c4c222675f83fd37.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-c1e9c53e75e301ed.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-beea7d9617fe25c5.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-80a2b295510dd038.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2021-09-08-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-f33ec377d42d7cd9" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lsnappy
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `practice_rust_ffi` due to 2 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0cf5a638390002e107c6c360106ce8923c02d2b2ce337a75edbd21678b599bd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cf5a638390002e107c6c360106ce8923c02d2b2ce337a75edbd21678b599bd8", kill_on_drop: false }`
[INFO] [stdout] 0cf5a638390002e107c6c360106ce8923c02d2b2ce337a75edbd21678b599bd8