[INFO] crate linkbot 0.0.2 is already in cache
[INFO] extracting crate linkbot 0.0.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/linkbot/0.0.2
[INFO] extracting crate linkbot 0.0.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/linkbot/0.0.2
[INFO] validating manifest of linkbot-0.0.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of linkbot-0.0.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing linkbot-0.0.2
[INFO] finished frobbing linkbot-0.0.2
[INFO] frobbed toml for linkbot-0.0.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/linkbot/0.0.2/Cargo.toml
[INFO] started frobbing linkbot-0.0.2
[INFO] finished frobbing linkbot-0.0.2
[INFO] frobbed toml for linkbot-0.0.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/linkbot/0.0.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing linkbot-0.0.2 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/linkbot/0.0.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 0accf9825050b05d9c414a267853142e5de867e9eb08c5ac22848d330202543e
[INFO] running `"docker" "start" "-a" "0accf9825050b05d9c414a267853142e5de867e9eb08c5ac22848d330202543e"`
[INFO] [stderr]    Compiling linkbot v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:65:27
[INFO] [stderr]    |
[INFO] [stderr] 65 | pub type ButtonCallback = FnMut(Button, ButtonState, u32);
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(Button, ButtonState, u32)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:326:41
[INFO] [stderr]     |
[INFO] [stderr] 326 |                                     cb: extern fn(i32, i32, i32, *mut Inner),
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(improper_ctypes)] on by default
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:327:47
[INFO] [stderr]     |
[INFO] [stderr] 327 |                                     userdata: *mut Inner) -> i32;
[INFO] [stderr]     |                                               ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:329:42
[INFO] [stderr]     |
[INFO] [stderr] 329 |                                      cb: Option<extern fn(i32, i32, i32, *mut Inner)>,
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:330:48
[INFO] [stderr]     |
[INFO] [stderr] 330 |                                      userdata: *mut Inner) -> i32;
[INFO] [stderr]     |                                                ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "0accf9825050b05d9c414a267853142e5de867e9eb08c5ac22848d330202543e"`
[INFO] running `"docker" "rm" "-f" "0accf9825050b05d9c414a267853142e5de867e9eb08c5ac22848d330202543e"`
[INFO] [stdout] 0accf9825050b05d9c414a267853142e5de867e9eb08c5ac22848d330202543e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/linkbot/0.0.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] a93539f5813ece84a1f10acf91864c1e733228ad4a6f8ba75fb06f717105992e
[INFO] running `"docker" "start" "-a" "a93539f5813ece84a1f10acf91864c1e733228ad4a6f8ba75fb06f717105992e"`
[INFO] [stderr]    Compiling linkbot v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:65:27
[INFO] [stderr]    |
[INFO] [stderr] 65 | pub type ButtonCallback = FnMut(Button, ButtonState, u32);
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(Button, ButtonState, u32)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `button`
[INFO] [stderr]    --> src/lib.rs:342:32
[INFO] [stderr]     |
[INFO] [stderr] 342 |         l.set_button_handler( |button, state, timestamp| {
[INFO] [stderr]     |                                ^^^^^^ help: consider prefixing with an underscore: `_button`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]    --> src/lib.rs:342:40
[INFO] [stderr]     |
[INFO] [stderr] 342 |         l.set_button_handler( |button, state, timestamp| {
[INFO] [stderr]     |                                        ^^^^^ help: consider prefixing with an underscore: `_state`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `timestamp`
[INFO] [stderr]    --> src/lib.rs:342:47
[INFO] [stderr]     |
[INFO] [stderr] 342 |         l.set_button_handler( |button, state, timestamp| {
[INFO] [stderr]     |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_timestamp`
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:326:41
[INFO] [stderr]     |
[INFO] [stderr] 326 |                                     cb: extern fn(i32, i32, i32, *mut Inner),
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(improper_ctypes)] on by default
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:327:47
[INFO] [stderr]     |
[INFO] [stderr] 327 |                                     userdata: *mut Inner) -> i32;
[INFO] [stderr]     |                                               ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:329:42
[INFO] [stderr]     |
[INFO] [stderr] 329 |                                      cb: Option<extern fn(i32, i32, i32, *mut Inner)>,
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `std::sync::Mutex<u8>` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]    --> src/lib.rs:330:48
[INFO] [stderr]     |
[INFO] [stderr] 330 |                                      userdata: *mut Inner) -> i32;
[INFO] [stderr]     |                                                ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:342:9
[INFO] [stderr]     |
[INFO] [stderr] 342 | /         l.set_button_handler( |button, state, timestamp| {
[INFO] [stderr] 343 | |             println!("Button press!");
[INFO] [stderr] 344 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:347:9
[INFO] [stderr]     |
[INFO] [stderr] 347 |         l.move_motors(7, 90.0, 90.0, 90.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:348:9
[INFO] [stderr]     |
[INFO] [stderr] 348 |         l.move_wait(7);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:349:9
[INFO] [stderr]     |
[INFO] [stderr] 349 |         l.move_motors(7, -90.0, -90.0, -90.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:350:9
[INFO] [stderr]     |
[INFO] [stderr] 350 |         l.move_wait(7);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:351:9
[INFO] [stderr]     |
[INFO] [stderr] 351 |         l.unset_button_handler();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:352:9
[INFO] [stderr]     |
[INFO] [stderr] 352 |         l.set_buzzer_frequency(440.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:354:9
[INFO] [stderr]     |
[INFO] [stderr] 354 |         l.set_buzzer_frequency(0.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.linkbot.96aq0uj2-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee" "/opt/crater/target/debug/deps/linkbot-8d4965bb840d24ee.3i66fhutk6a7huqc.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-llinkbot" "-Wl,-Bstatic" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-7d9df032c0eb8a14.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libterm-77300aa0d630d98f.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-4d48ca12b265d456.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-8869eee15acf0f54.rlib" "/opt/crater/target/debug/deps/liblibc-15b143653abd1ffe.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-a80a1e8e09cafef8.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e0e6351da805c468.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-e04f54bafc95e331.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-67901d3322495bd5.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-bd390b1abaceaec1.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-312dd37fdc7bedfc.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8ed0e51d58d644a3.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-8a423c320a6c707f.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-d6a95598e2238263.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d231614b153016eb.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-3821619027f463e4.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-1cfd794d18771a44.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-dcf33cf10c2452ef.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-c258fea34bf64bce.rlib" "-Wl,-Bdynamic" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -llinkbot
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `linkbot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a93539f5813ece84a1f10acf91864c1e733228ad4a6f8ba75fb06f717105992e"`
[INFO] running `"docker" "rm" "-f" "a93539f5813ece84a1f10acf91864c1e733228ad4a6f8ba75fb06f717105992e"`
[INFO] [stdout] a93539f5813ece84a1f10acf91864c1e733228ad4a6f8ba75fb06f717105992e