[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 master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotechite%2Frust-snappy-example" "/workspace/builds/worker-38/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-38/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/totechite/rust-snappy-example on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-38/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21082b6e5471b75a4201e15edb310c923b2b7d1af6875dc969502eaf39c55ab5
[INFO] running `Command { std: "docker" "start" "-a" "21082b6e5471b75a4201e15edb310c923b2b7d1af6875dc969502eaf39c55ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21082b6e5471b75a4201e15edb310c923b2b7d1af6875dc969502eaf39c55ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21082b6e5471b75a4201e15edb310c923b2b7d1af6875dc969502eaf39c55ab5", kill_on_drop: false }`
[INFO] [stdout] 21082b6e5471b75a4201e15edb310c923b2b7d1af6875dc969502eaf39c55ab5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e04a5fcdfa37e34b0263bb430017ba3de57ec35fc0a284a5a05280c731f58a3
[INFO] running `Command { std: "docker" "start" "-a" "1e04a5fcdfa37e34b0263bb430017ba3de57ec35fc0a284a5a05280c731f58a3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.practice_rust_ffi.137d0b3e-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a.1ccdu0vnn19cv00s.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lsnappy" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-61530c4f8eaefb18.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9c44f1fe63de3edb.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-5dfdbb680ac299a1.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-353beaf877db2fdf.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-cd4abd33332d2d3f.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-3b908b5b50ddd80c.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-9cafd3521b5532d3.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-7b0935832903a9ac.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-8a349b13d67c76e3.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-9d41e7cb09eafd8e.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-095194fedb4c0ec4.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-968cf83f088269ec.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-e63bbb95a6beff5c.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-9f216e67c2916fa5.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-4688b763605c6a0e.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-a9b2dc3244289321.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-52d5241975807511.rlib" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9924c22ae1efcf66.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-003d83a588984e1f.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/b70888601af92f6cdc0364abab3446e418b91d36/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/practice_rust_ffi-53d1a084457a638a" "-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" "1e04a5fcdfa37e34b0263bb430017ba3de57ec35fc0a284a5a05280c731f58a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e04a5fcdfa37e34b0263bb430017ba3de57ec35fc0a284a5a05280c731f58a3", kill_on_drop: false }`
[INFO] [stdout] 1e04a5fcdfa37e34b0263bb430017ba3de57ec35fc0a284a5a05280c731f58a3