[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 try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvnvelasco%2Flearning-rust" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kvnvelasco/learning-rust on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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-19/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arc-swap v0.4.5
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.15
[INFO] [stderr]   Downloaded hermit-abi v0.1.10
[INFO] [stderr]   Downloaded tokio v0.2.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d235261e545b02ace91f0544515ba3010085d254fcb6a6682934275f911b8bbb
[INFO] running `Command { std: "docker" "start" "-a" "d235261e545b02ace91f0544515ba3010085d254fcb6a6682934275f911b8bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d235261e545b02ace91f0544515ba3010085d254fcb6a6682934275f911b8bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d235261e545b02ace91f0544515ba3010085d254fcb6a6682934275f911b8bbb", kill_on_drop: false }`
[INFO] [stdout] d235261e545b02ace91f0544515ba3010085d254fcb6a6682934275f911b8bbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0244ae6a4d2541eb58b45be2b2e4e811bc1f54cf67f1508be2ea8c831c3d42f
[INFO] running `Command { std: "docker" "start" "-a" "d0244ae6a4d2541eb58b45be2b2e4e811bc1f54cf67f1508be2ea8c831c3d42f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling log v0.4.8
[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 pin-project-lite v0.1.4
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir/dynamic-programming)
[INFO] [stderr]    Compiling threads v0.1.0 (/opt/rustwide/workdir/threads)
[INFO] [stderr]    Compiling syscalls v0.1.0 (/opt/rustwide/workdir/syscalls)
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling ffi v0.1.0 (/opt/rustwide/workdir/ffi)
[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: 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] [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-db2c09a209869c73.ffi.81088876-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.ffi.81088876-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73.400i2x0qlhvqzvbv.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lrsync" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-ffe0d2d34dcd345e.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9c44f1fe63de3edb.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-5dfdbb680ac299a1.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-353beaf877db2fdf.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-cd4abd33332d2d3f.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-3b908b5b50ddd80c.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-9cafd3521b5532d3.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-7b0935832903a9ac.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-8a349b13d67c76e3.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-9d41e7cb09eafd8e.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-095194fedb4c0ec4.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-968cf83f088269ec.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-e63bbb95a6beff5c.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-9f216e67c2916fa5.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-4688b763605c6a0e.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-a9b2dc3244289321.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-52d5241975807511.rlib" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9924c22ae1efcf66.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-003d83a588984e1f.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/d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/ffi-db2c09a209869c73" "-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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d0244ae6a4d2541eb58b45be2b2e4e811bc1f54cf67f1508be2ea8c831c3d42f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0244ae6a4d2541eb58b45be2b2e4e811bc1f54cf67f1508be2ea8c831c3d42f", kill_on_drop: false }`
[INFO] [stdout] d0244ae6a4d2541eb58b45be2b2e4e811bc1f54cf67f1508be2ea8c831c3d42f