[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 1.55.0 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvnvelasco%2Flearning-rust" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/kvnvelasco/learning-rust on toolchain 1.55.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-8/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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded arc-swap v0.4.5 [INFO] [stderr] Downloaded tokio v0.2.16 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 139d1f36197a890ba2c811c30161f4b6fa3e5b30f4f2bfb325d08275a9b02987 [INFO] running `Command { std: "docker" "start" "-a" "139d1f36197a890ba2c811c30161f4b6fa3e5b30f4f2bfb325d08275a9b02987", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "139d1f36197a890ba2c811c30161f4b6fa3e5b30f4f2bfb325d08275a9b02987", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "139d1f36197a890ba2c811c30161f4b6fa3e5b30f4f2bfb325d08275a9b02987", kill_on_drop: false }` [INFO] [stdout] 139d1f36197a890ba2c811c30161f4b6fa3e5b30f4f2bfb325d08275a9b02987 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1dc761ab0562c4ede41de80a5301d82fd63c21124f47f47bcb2d58736ba1fabc [INFO] running `Command { std: "docker" "start" "-a" "1dc761ab0562c4ede41de80a5301d82fd63c21124f47f47bcb2d58736ba1fabc", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.10 [INFO] [stderr] Compiling libc v0.2.68 [INFO] [stderr] Compiling unicode-xid v0.2.0 [INFO] [stderr] Compiling syn v1.0.17 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling slab v0.4.2 [INFO] [stderr] Compiling proc-macro-nested v0.1.4 [INFO] [stderr] Compiling futures-core v0.3.4 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling futures-sink v0.3.4 [INFO] [stderr] Compiling proc-macro-hack v0.5.15 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling pin-utils v0.1.0-alpha.4 [INFO] [stderr] Compiling futures-io v0.3.4 [INFO] [stderr] Compiling futures-task v0.3.4 [INFO] [stderr] Compiling arc-swap v0.4.5 [INFO] [stderr] Compiling httparse v1.3.4 [INFO] [stderr] Compiling fnv v1.0.6 [INFO] [stderr] Compiling bytes v0.5.4 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling pin-project-lite v0.1.4 [INFO] [stderr] Compiling threads v0.1.0 (/opt/rustwide/workdir/threads) [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] [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling threaded-tcp-server v0.1.0 (/opt/rustwide/workdir/threaded-tcp-server) [INFO] [stderr] Compiling quote v1.0.3 [INFO] [stdout] warning: unused import: `std::thread::sleep` [INFO] [stdout] --> threaded-tcp-server/src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::thread::sleep; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> threaded-tcp-server/src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `read_size` [INFO] [stdout] --> threaded-tcp-server/src/main.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let read_size = stream.read(&mut buffer).unwrap(); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_read_size` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `request` [INFO] [stdout] --> threaded-tcp-server/src/main.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let request = { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> threaded-tcp-server/src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | req.parse(&buffer); [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 net2 v0.2.33 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling signal-hook-registry v1.2.0 [INFO] [stderr] Compiling num_cpus v1.12.0 [INFO] [stderr] Compiling ffi v0.1.0 (/opt/rustwide/workdir/ffi) [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [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] [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] [stdout] error: linking with `cc` failed: exit status: 1 [INFO] [stdout] | [INFO] [stdout] = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.ffi.34787ea0-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57.3w4dqbzbnczoep6y.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lrsync" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-311e0d28c6d1dcc9.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-008055cc7d873802.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-06f01ac2578bda94.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-f9a3c3274a1835e0.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-d4cbb754ee9f4daa.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-95c14e1c1e3ebcc4.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-d489f0ca872880cc.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-75f07df0b18fea39.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-0c35b278736219a2.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-e530649c9a06e3c6.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-6b148909d375a785.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-cd15fa647f4775d1.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74be3a703f788ba2.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-8f2c5b445c28b2e3.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-8480e85e0be96197.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-ac23a75f6f42004e.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-557ba8776e04d182.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-4beb03d03503c439.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-dd7db1bec6909f24.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/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/ffi-b9f0e017ddbb9b57" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-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] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "1dc761ab0562c4ede41de80a5301d82fd63c21124f47f47bcb2d58736ba1fabc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1dc761ab0562c4ede41de80a5301d82fd63c21124f47f47bcb2d58736ba1fabc", kill_on_drop: false }` [INFO] [stdout] 1dc761ab0562c4ede41de80a5301d82fd63c21124f47f47bcb2d58736ba1fabc