[INFO] cloning repository https://github.com/kvnvelasco/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kvnvelasco/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvnvelasco%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvnvelasco%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32d9d127a88eefcdd05e9dc50cb90d8a29d217cd
[INFO] testing kvnvelasco/learning-rust against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvnvelasco%2Flearning-rust" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kvnvelasco/learning-rust on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kvnvelasco/learning-rust
[INFO] finished tweaking git repo https://github.com/kvnvelasco/learning-rust
[INFO] tweaked toml for git repo https://github.com/kvnvelasco/learning-rust written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/kvnvelasco/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 150c3cf8eac167173ff4f25ef9b5fb822e28b6d46d1236cc4f6b3673868ef728
[INFO] running `Command { std: "docker" "start" "-a" "150c3cf8eac167173ff4f25ef9b5fb822e28b6d46d1236cc4f6b3673868ef728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "150c3cf8eac167173ff4f25ef9b5fb822e28b6d46d1236cc4f6b3673868ef728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "150c3cf8eac167173ff4f25ef9b5fb822e28b6d46d1236cc4f6b3673868ef728", kill_on_drop: false }`
[INFO] [stdout] 150c3cf8eac167173ff4f25ef9b5fb822e28b6d46d1236cc4f6b3673868ef728
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 750213b9e7245266c9b3a273a3ddab5a4da676ede681899ddd795d2a02fb7229
[INFO] running `Command { std: "docker" "start" "-a" "750213b9e7245266c9b3a273a3ddab5a4da676ede681899ddd795d2a02fb7229", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling futures-io v0.3.4
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling arc-swap v0.4.5
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling pin-project-lite v0.1.4
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir/dynamic-programming)
[INFO] [stderr]    Compiling syscalls v0.1.0 (/opt/rustwide/workdir/syscalls)
[INFO] [stderr]    Compiling threads v0.1.0 (/opt/rustwide/workdir/threads)
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling ffi v0.1.0 (/opt/rustwide/workdir/ffi)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> threads/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         thread.join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stdout] warning: unused imports: `c_int`, `c_longlong`, `c_uchar`
[INFO] [stdout]  --> ffi/src/main.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use std::os::raw::{c_char, c_int, c_longlong, c_uchar};
[INFO] [stdout]   |                                ^^^^^  ^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Done`
[INFO] [stdout]   --> ffi/src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         Done = 0,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `RsSyncResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> ffi/src/main.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |     #[derive(Debug)]
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Delta`
[INFO] [stdout]   --> ffi/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Delta = 0x72730236,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Blake2Hash`
[INFO] [stdout]   --> ffi/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         Blake2Hash = 0x72730137,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `RsyncStats`, which is not FFI-safe
[INFO] [stdout]   --> ffi/src/main.rs:35:20
[INFO] [stdout]    |
[INFO] [stdout] 35 |             stats: *mut RsyncStats,
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> ffi/src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub struct RsyncStats {}
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.ffi.ef2c6f81-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59.5a699t5j5s3xo2ma.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lrsync" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-331d69a0306c4dc9.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-ff9290e971253a38.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-5534b29ea7b2d8f5.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-8bfbb13072fc2761.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-d6d1fa92fa620f17.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-7cfd201521727d95.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-0e8010e8fce8e5a7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-19093fec3c6dd913.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-89c4cbe9256c1890.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-73e4507673363945.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-3fe98c0f46f27964.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-a76787f08d45e37d.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8cea480e62c5b261.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-1fb939608cd05a1c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-842e67e3ab562f66.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-0c1c8fec3b1a54cc.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-689faa634b72af17.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-6c2c561a8181be5e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-88c4d85fe493b0a6.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f5394bdb1df5df01.rlib" "-Wl,-Bdynamic" "-lutil" "-ldl" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/ffi-f36bbc668e25dd59" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lrsync
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ffi` due to 2 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "750213b9e7245266c9b3a273a3ddab5a4da676ede681899ddd795d2a02fb7229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "750213b9e7245266c9b3a273a3ddab5a4da676ede681899ddd795d2a02fb7229", kill_on_drop: false }`
[INFO] [stdout] 750213b9e7245266c9b3a273a3ddab5a4da676ede681899ddd795d2a02fb7229