[INFO] cloning repository https://github.com/mikeycgto/ruru-rstring-encoding
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mikeycgto/ruru-rstring-encoding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeycgto%2Fruru-rstring-encoding", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeycgto%2Fruru-rstring-encoding'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 580edf61e9c0942706726a4bd3b5cfa2c62b2520
[INFO] testing mikeycgto/ruru-rstring-encoding against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeycgto%2Fruru-rstring-encoding" "/workspace/builds/worker-46/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-46/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mikeycgto/ruru-rstring-encoding on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mikeycgto/ruru-rstring-encoding
[INFO] finished tweaking git repo https://github.com/mikeycgto/ruru-rstring-encoding
[INFO] tweaked toml for git repo https://github.com/mikeycgto/ruru-rstring-encoding written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] crate git repo https://github.com/mikeycgto/ruru-rstring-encoding already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lazy_static v0.2.2
[INFO] [stderr]   Downloaded ruru v0.9.3
[INFO] [stderr]   Downloaded ruby-sys v0.2.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c71a0d0c3518316c4897cf7bc1bdfb8c4b6f29fc97422e770c7a3573c3614cd
[INFO] running `Command { std: "docker" "start" "-a" "4c71a0d0c3518316c4897cf7bc1bdfb8c4b6f29fc97422e770c7a3573c3614cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c71a0d0c3518316c4897cf7bc1bdfb8c4b6f29fc97422e770c7a3573c3614cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c71a0d0c3518316c4897cf7bc1bdfb8c4b6f29fc97422e770c7a3573c3614cd", kill_on_drop: false }`
[INFO] [stdout] 4c71a0d0c3518316c4897cf7bc1bdfb8c4b6f29fc97422e770c7a3573c3614cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 823378aa03cf478baba4dc478afa420e9c1b723e3d4b501e958f1fa5e8d32c47
[INFO] running `Command { std: "docker" "start" "-a" "823378aa03cf478baba4dc478afa420e9c1b723e3d4b501e958f1fa5e8d32c47", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ruby-sys v0.2.20
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling lazy_static v0.2.2
[INFO] [stderr]    Compiling ruru v0.9.3
[INFO] [stderr]    Compiling ruru-rstring-encoding v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `StringTest`, which is not FFI-safe
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     StringTest,
[INFO] [stdout]   |     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]   = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]   = note: this struct has unspecified layout
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | class!(StringTest);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: this warning originates in the macro `class` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--version-script=/tmp/rustcxTkXhq/list" "-m64" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.06e78f3e-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.06e78f3e-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.06e78f3e-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.06e78f3e-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.06e78f3e-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.8s0q9tqlrszeqby.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.12fwm8vjauqxo3u1.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/usr/lib" "-L" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/libruru-a0c6dbca570a9cb2.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/libruby_sys-abf276603394d320.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/liblibc-8744f5e22a919e9b.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/liblazy_static-d35d41b8217d9572.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-008055cc7d873802.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-06f01ac2578bda94.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-f9a3c3274a1835e0.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-d4cbb754ee9f4daa.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-95c14e1c1e3ebcc4.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-d489f0ca872880cc.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-75f07df0b18fea39.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-0c35b278736219a2.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-e530649c9a06e3c6.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-6b148909d375a785.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-cd15fa647f4775d1.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74be3a703f788ba2.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-8f2c5b445c28b2e3.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-8480e85e0be96197.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-ac23a75f6f42004e.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-557ba8776e04d182.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-4beb03d03503c439.rlib" "-Wl,--no-whole-archive" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-dd7db1bec6909f24.rlib" "-Wl,-Bdynamic" "-lruby-2.7" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/libruru_rstring_encoding.so" "-shared" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lruby-2.7
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruru-rstring-encoding` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "823378aa03cf478baba4dc478afa420e9c1b723e3d4b501e958f1fa5e8d32c47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823378aa03cf478baba4dc478afa420e9c1b723e3d4b501e958f1fa5e8d32c47", kill_on_drop: false }`
[INFO] [stdout] 823378aa03cf478baba4dc478afa420e9c1b723e3d4b501e958f1fa5e8d32c47