[INFO] cloning repository https://github.com/jgall/obj_c_rust_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jgall/obj_c_rust_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjgall%2Fobj_c_rust_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjgall%2Fobj_c_rust_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b09ac01e74fdd7020c441cdba6dec9eb5811962
[INFO] testing jgall/obj_c_rust_test against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjgall%2Fobj_c_rust_test" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jgall/obj_c_rust_test on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jgall/obj_c_rust_test
[INFO] finished tweaking git repo https://github.com/jgall/obj_c_rust_test
[INFO] tweaked toml for git repo https://github.com/jgall/obj_c_rust_test written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/jgall/obj_c_rust_test already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 888cb95acc2caf5661f00e01351ff84c054e99ff4a3c1f818190140aa090c98f
[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" "888cb95acc2caf5661f00e01351ff84c054e99ff4a3c1f818190140aa090c98f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "888cb95acc2caf5661f00e01351ff84c054e99ff4a3c1f818190140aa090c98f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "888cb95acc2caf5661f00e01351ff84c054e99ff4a3c1f818190140aa090c98f", kill_on_drop: false }`
[INFO] [stdout] 888cb95acc2caf5661f00e01351ff84c054e99ff4a3c1f818190140aa090c98f
[INFO] running `Command { std: "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" "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" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a71f46f77ec1c3d22b0ca5dbd2ec12b28587df4874c1d5f77d941b273eaf2974
[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" "a71f46f77ec1c3d22b0ca5dbd2ec12b28587df4874c1d5f77d941b273eaf2974", kill_on_drop: false }`
[INFO] [stderr]    Compiling malloc_buf v0.0.6
[INFO] [stderr]    Compiling objc v0.2.7
[INFO] [stderr]    Compiling objc-macros v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `objc::declare::ClassDecl`
[INFO] [stdout]  --> src/class.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use objc::declare::ClassDecl;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Class`, `Object`, `Sel`
[INFO] [stdout]  --> src/class.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use objc::runtime::{Class, Object, Sel};
[INFO] [stdout]   |                     ^^^^^  ^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/class.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | / macro_rules! process_field {
[INFO] [stdout] 36 | |     ($class_dec:expr, (sel $($sel_name:ident :)* <- $fun_name:expr)) => {{
[INFO] [stdout] 37 | |         unsafe {
[INFO] [stdout] 38 | |             $class_dec.add_method(sel!($($sel_name :)*), $fun_name)
[INFO] [stdout] ...  |
[INFO] [stdout] 61 | |     };
[INFO] [stdout] 62 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `objc::declare::ClassDecl`
[INFO] [stdout]  --> src/class.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use objc::declare::ClassDecl;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Class`, `Object`, `Sel`
[INFO] [stdout]  --> src/class.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use objc::runtime::{Class, Object, Sel};
[INFO] [stdout]   |                     ^^^^^  ^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> src/main.rs:17:30
[INFO] [stdout]    |
[INFO] [stdout] 17 |     extern "C" fn obj_method(obj: &mut Object, sel: Sel, i1: i32, i2: i32) -> i32 {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sel`
[INFO] [stdout]   --> src/main.rs:17:48
[INFO] [stdout]    |
[INFO] [stdout] 17 |     extern "C" fn obj_method(obj: &mut Object, sel: Sel, i1: i32, i2: i32) -> i32 {
[INFO] [stdout]    |                                                ^^^ help: if this is intentional, prefix it with an underscore: `_sel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i1`
[INFO] [stdout]   --> src/main.rs:17:58
[INFO] [stdout]    |
[INFO] [stdout] 17 |     extern "C" fn obj_method(obj: &mut Object, sel: Sel, i1: i32, i2: i32) -> i32 {
[INFO] [stdout]    |                                                          ^^ help: if this is intentional, prefix it with an underscore: `_i1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i2`
[INFO] [stdout]   --> src/main.rs:17:67
[INFO] [stdout]    |
[INFO] [stdout] 17 |     extern "C" fn obj_method(obj: &mut Object, sel: Sel, i1: i32, i2: i32) -> i32 {
[INFO] [stdout]    |                                                                   ^^ help: if this is intentional, prefix it with an underscore: `_i2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> src/class.rs:43:36
[INFO] [stdout]    |
[INFO] [stdout] 43 |           extern "C" fn selector_fun($obj: &mut Object, $sel: Sel, $($sel_local_name:$sel_type),*) -> $ret_type $body
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/main.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |       let my_box_class = register_class!(MyBox:NSObject with {
[INFO] [stdout]    |  ________________________-
[INFO] [stdout] 23 | |         (pub width: u32),
[INFO] [stdout] 24 | |         (priv height: u32),
[INFO] [stdout] 25 | |         (sel getThing:withOtherThing: <- my_method),
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }),
[INFO] [stdout] 29 | |     });
[INFO] [stdout]    | |______- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sel`
[INFO] [stdout]   --> src/class.rs:43:55
[INFO] [stdout]    |
[INFO] [stdout] 43 |           extern "C" fn selector_fun($obj: &mut Object, $sel: Sel, $($sel_local_name:$sel_type),*) -> $ret_type $body
[INFO] [stdout]    |                                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_sel`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/main.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |       let my_box_class = register_class!(MyBox:NSObject with {
[INFO] [stdout]    |  ________________________-
[INFO] [stdout] 23 | |         (pub width: u32),
[INFO] [stdout] 24 | |         (priv height: u32),
[INFO] [stdout] 25 | |         (sel getThing:withOtherThing: <- my_method),
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }),
[INFO] [stdout] 29 | |     });
[INFO] [stdout]    | |______- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t1`
[INFO] [stdout]   --> src/class.rs:43:68
[INFO] [stdout]    |
[INFO] [stdout] 43 |           extern "C" fn selector_fun($obj: &mut Object, $sel: Sel, $($sel_local_name:$sel_type),*) -> $ret_type $body
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_t1`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/main.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |       let my_box_class = register_class!(MyBox:NSObject with {
[INFO] [stdout]    |  ________________________-
[INFO] [stdout] 23 | |         (pub width: u32),
[INFO] [stdout] 24 | |         (priv height: u32),
[INFO] [stdout] 25 | |         (sel getThing:withOtherThing: <- my_method),
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }),
[INFO] [stdout] 29 | |     });
[INFO] [stdout]    | |______- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t2`
[INFO] [stdout]   --> src/class.rs:43:68
[INFO] [stdout]    |
[INFO] [stdout] 43 |           extern "C" fn selector_fun($obj: &mut Object, $sel: Sel, $($sel_local_name:$sel_type),*) -> $ret_type $body
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_t2`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/main.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |       let my_box_class = register_class!(MyBox:NSObject with {
[INFO] [stdout]    |  ________________________-
[INFO] [stdout] 23 | |         (pub width: u32),
[INFO] [stdout] 24 | |         (priv height: u32),
[INFO] [stdout] 25 | |         (sel getThing:withOtherThing: <- my_method),
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }),
[INFO] [stdout] 29 | |     });
[INFO] [stdout]    | |______- in this macro invocation
[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/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.objc_macros.ccuazx7u-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb" "/opt/rustwide/target/debug/deps/objc_macros-614354b10add3bcb.5a7qb8mfcw77j5sp.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libobjc-34c8e399bd8cede5.rlib" "/opt/rustwide/target/debug/deps/libmalloc_buf-4e4afc559a2dbf96.rlib" "/opt/rustwide/target/debug/deps/liblibc-9f120d1438bf7694.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-3532beb752f910d7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-3529ece450b7f3c6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-23e8f582a6744f80.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-5e7e0793b29cbf78.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-253e0736424ceb78.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-b6fd484888124c85.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-cca4d20e4b53839c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-0a7401891c2a4f50.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-efbb25e073df787e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-25965457612624bc.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-09058283ea779342.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-ab973dacc0513511.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b437d6640b1f764b.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-8cc0b2380206399c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-727cdf2b6a468113.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-cf4d442d877ea2f4.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-7e5b6df427ca977c.rlib" "-Wl,-Bdynamic" "-lobjc" "-lutil" "-lutil" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/libobjc-34c8e399bd8cede5.rlib(objc-34c8e399bd8cede5.objc.9m3rj9w8-cgu.0.rcgu.o): in function `objc::runtime::Object::class':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/objc-0.2.7/src/runtime.rs:464: undefined reference to `object_getClass'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libobjc-34c8e399bd8cede5.rlib(objc-34c8e399bd8cede5.objc.9m3rj9w8-cgu.11.rcgu.o): in function `<objc::rc::strong::StrongPtr as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/objc-0.2.7/src/rc/strong.rs:48: undefined reference to `objc_release'
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `objc-macros`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a71f46f77ec1c3d22b0ca5dbd2ec12b28587df4874c1d5f77d941b273eaf2974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a71f46f77ec1c3d22b0ca5dbd2ec12b28587df4874c1d5f77d941b273eaf2974", kill_on_drop: false }`
[INFO] [stdout] a71f46f77ec1c3d22b0ca5dbd2ec12b28587df4874c1d5f77d941b273eaf2974
