[INFO] crate linkbot 0.0.2 is already in cache
[INFO] extracting crate linkbot 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/linkbot/0.0.2
[INFO] extracting crate linkbot 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linkbot/0.0.2
[INFO] validating manifest of linkbot-0.0.2 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of linkbot-0.0.2 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/reg/linkbot/0.0.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing linkbot-0.0.2 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5f5f790b8e670a7c92f0260c9ac472b7b65aa18188f770f5bcb37a7b82db7283
[INFO] running `"docker" "start" "-a" "5f5f790b8e670a7c92f0260c9ac472b7b65aa18188f770f5bcb37a7b82db7283"`
[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 0.35s
[INFO] running `"docker" "inspect" "5f5f790b8e670a7c92f0260c9ac472b7b65aa18188f770f5bcb37a7b82db7283"`
[INFO] running `"docker" "rm" "-f" "5f5f790b8e670a7c92f0260c9ac472b7b65aa18188f770f5bcb37a7b82db7283"`
[INFO] [stdout] 5f5f790b8e670a7c92f0260c9ac472b7b65aa18188f770f5bcb37a7b82db7283
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] a99b1954f540c2c400cb4cc750e62661dcb44d8b40282890e76ebb9e4b95f1a5
[INFO] running `"docker" "start" "-a" "a99b1954f540c2c400cb4cc750e62661dcb44d8b40282890e76ebb9e4b95f1a5"`
[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-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.linkbot.el8hwijy-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452" "/opt/crater/target/debug/deps/linkbot-d4f75ca0357b1452.2umxwkuqdyqztcll.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-llinkbot" "-Wl,-Bstatic" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-f0d86b2ef6410e4f.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libterm-28a84d78fba0104f.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-625008d0a6744ece.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-b85c11af396739da.rlib" "/opt/crater/target/debug/deps/liblibc-37f3d1c853b3b7bd.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-1d6d86bd078a28e9.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e9721e46a424e2a9.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-c07193698f282147.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-6da45690f3863086.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-690797036dd27680.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-d3896ccbfd8eda2b.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-7cccc3739e3d7623.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-5e9ba178a513cd29.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-5ca9f83bf63d1f4b.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-bba1c7ef9e950882.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-e23c9de62012deb5.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-9b59dffdcd513d5d.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-17392340ab2e4a97.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ac21508a81e3f7f3.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" "a99b1954f540c2c400cb4cc750e62661dcb44d8b40282890e76ebb9e4b95f1a5"`
[INFO] running `"docker" "rm" "-f" "a99b1954f540c2c400cb4cc750e62661dcb44d8b40282890e76ebb9e4b95f1a5"`
[INFO] [stdout] a99b1954f540c2c400cb4cc750e62661dcb44d8b40282890e76ebb9e4b95f1a5