[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 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeycgto%2Fruru-rstring-encoding" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mikeycgto/ruru-rstring-encoding on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-3/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" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 709f7b9e54c08ee72a28ee54f271064cf42b9cc0001f2747080f1057bc69baea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "709f7b9e54c08ee72a28ee54f271064cf42b9cc0001f2747080f1057bc69baea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "709f7b9e54c08ee72a28ee54f271064cf42b9cc0001f2747080f1057bc69baea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "709f7b9e54c08ee72a28ee54f271064cf42b9cc0001f2747080f1057bc69baea", kill_on_drop: false }`
[INFO] [stdout] 709f7b9e54c08ee72a28ee54f271064cf42b9cc0001f2747080f1057bc69baea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3fe5404da1be44df3b58be32ff17f6919d1a3f00fe0554e8f0b9e247c3295607
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3fe5404da1be44df3b58be32ff17f6919d1a3f00fe0554e8f0b9e247c3295607", kill_on_drop: false }`
[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 a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.6bttikwg-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.6bttikwg-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.6bttikwg-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.6bttikwg-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.ruru_rstring_encoding.6bttikwg-cgu.4.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/libruru_rstring_encoding.so" "-Wl,--version-script=/tmp/rustczPeJi6/list" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.3fls2zr0q9ji5af3.rcgu.o" "/opt/rustwide/target/debug/deps/ruru_rstring_encoding.u5uxsqe3micgw3a.rcgu.o" "-shared" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/usr/lib" "-L" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libruru-5a6ff0283831d0ae.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libruby_sys-56db516bbabfef2b.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/liblibc-dc3970bad2fcfb85.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/liblazy_static-e32a991de8bae5fe.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libstd-f14aca24435a5414.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libpanic_unwind-48d342a8b48d1d01.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libminiz_oxide-14bc0820888c8eb3.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libadler-9cbd9e217bff06bc.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libobject-31826136df98934e.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libaddr2line-075976a117c8fd5d.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libgimli-2d5cbedfbf17a011.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/librustc_demangle-0474372ff08c5319.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libhashbrown-d437c34460d2315a.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/librustc_std_workspace_alloc-fb61ed1b8cc4de79.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libunwind-bf76d1b643bfc9f0.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libcfg_if-a1b53aa7fddcf418.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/liblibc-28585e57fac45c73.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/liballoc-64801769bc15ab28.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/librustc_std_workspace_core-541997b56bb98660.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustczPeJi6/libcore-cdea3c81adab3d12.rlib" "-Wl,--no-whole-archive" "-Wl,--end-group" "/tmp/rustczPeJi6/libcompiler_builtins-cd9f15a39fb65cbc.rlib" "-Wl,-Bdynamic" "-lruby-2.7" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[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`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "3fe5404da1be44df3b58be32ff17f6919d1a3f00fe0554e8f0b9e247c3295607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fe5404da1be44df3b58be32ff17f6919d1a3f00fe0554e8f0b9e247c3295607", kill_on_drop: false }`
[INFO] [stdout] 3fe5404da1be44df3b58be32ff17f6919d1a3f00fe0554e8f0b9e247c3295607
