[INFO] cloning repository https://github.com/tyrchen/rust-training
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tyrchen/rust-training" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyrchen%2Frust-training", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyrchen%2Frust-training'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd08bcb50cffdc4f1d715afdaf83af05eb76705c
[INFO] building tyrchen/rust-training against master#70591dc15db32941fe3595fdbf98e58d6975f95e for pr-127731
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyrchen%2Frust-training" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write file slides/images/centralized-network.png
[INFO] [stderr] error: unable to write file slides/images/cert.png
[INFO] [stderr] error: unable to write file slides/images/cert_intro.png
[INFO] [stderr] error: unable to write file slides/images/classes.png
[INFO] [stderr] error: unable to write file slides/images/client_cert.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-1.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-2.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-3.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-4.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-5.jpg
[INFO] [stderr] error: unable to write file slides/images/concurrency-6.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-channel.jpg
[INFO] [stderr] error: unable to write file slides/images/concurrency-example1.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-example2.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-mutex.png
[INFO] [stderr] error: unable to write file slides/images/concurrency-semaphore.jpg
[INFO] [stderr] error: unable to write file slides/images/concurrency-spinlock.png
[INFO] [stderr] error: unable to write file slides/images/ecdh.png
[INFO] [stderr] error: unable to write file slides/images/error-handling.jpg
[INFO] [stderr] error: unable to write file slides/images/ffi-arch.png
[INFO] [stderr] error: unable to write file slides/images/ffi-bridge.jpg
[INFO] [stderr] error: unable to write file slides/images/first_principles.jpg
[INFO] [stderr] error: unable to write file slides/images/geektime.png
[INFO] [stderr] error: unable to write file slides/images/generic_programming.jpg
[INFO] [stderr] error: unable to write file slides/images/gp_example.jpg
[INFO] [stderr] error: unable to write file slides/images/headless-chrome.jpg
[INFO] [stderr] error: unable to write file slides/images/js_runtime.png
[INFO] [stderr] error: unable to write file slides/images/microsoft-memory-safety-trends.png
[INFO] [stderr] error: unable to write file slides/images/network-stack.png
[INFO] [stderr] error: unable to write file slides/images/network.png
[INFO] [stderr] error: unable to write file slides/images/network1.png
[INFO] [stderr] error: unable to write file slides/images/noise-process.jpg
[INFO] [stderr] error: unable to write file slides/images/noise.jpg
[INFO] [stderr] error: unable to write file slides/images/noise_code.jpg
[INFO] [stderr] error: unable to write file slides/images/ownership.jpg
[INFO] [stderr] error: unable to write file slides/images/p2p-network.jpg
[INFO] [stderr] error: unable to write file slides/images/polars.jpg
[INFO] [stderr] error: unable to write file slides/images/programming_lang.jpg
[INFO] [stderr] error: unable to write file slides/images/programming_lang1.jpg
[INFO] [stderr] error: unable to write file slides/images/promise.jpg
[INFO] [stderr] error: unable to write file slides/images/root-causes.png
[INFO] [stderr] error: unable to write file slides/images/rust-network-stack.png
[INFO] [stderr] error: unable to write file slides/images/rust_code.png
[INFO] [stderr] error: unable to write file slides/images/rust_expressiveness.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_ffi.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_future.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_gp.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_learning_curve.png
[INFO] [stderr] error: unable to write file slides/images/rust_memory.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_memory_ref.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_safety.png
[INFO] [stderr] error: unable to write file slides/images/rust_safety1.png
[INFO] [stderr] error: unable to write file slides/images/rust_trait1.jpg
[INFO] [stderr] error: unable to write file slides/images/rust_type.png
[INFO] [stderr] error: unable to write file slides/images/rust_type_system.jpg
[INFO] [stderr] error: unable to write file slides/images/security.png
[INFO] [stderr] error: unable to write file slides/images/server_cert.png
[INFO] [stderr] error: unable to write file slides/images/stack_lifetime.jpg
[INFO] [stderr] error: unable to write file slides/images/strtok.jpg
[INFO] [stderr] error: unable to write file slides/images/swap_problem.jpeg
[INFO] [stderr] error: unable to write file slides/images/swift-test.jpg
[INFO] [stderr] error: unable to write file slides/images/tls_code.jpg
[INFO] [stderr] error: unable to write file slides/images/tls_config.jpg
[INFO] [stderr] error: unable to write file slides/images/tokio.png
[INFO] [stderr] error: unable to write file slides/images/tracing_gc.jpg
[INFO] [stderr] error: unable to write file slides/images/trait_choices.jpg
[INFO] [stderr] error: unable to write file slides/images/trait_formatter.jpg
[INFO] [stderr] error: unable to write file slides/images/trait_object.jpg
[INFO] [stderr] error: unable to write file slides/images/typical-app.png
[INFO] [stderr] error: unable to write file slides/images/unsafe_rust.jpg
[INFO] [stderr] error: unable to write file slides/images/why_generics.jpg
[INFO] [stderr] error: unable to write file slides/index.md
[INFO] [stderr] error: unable to write file slides/nom.md
[INFO] [stderr] error: unable to write file slides/rust-crates.md
[INFO] [stderr] error: unable to write file slides/rust-training-all-in-one-cn.md
[INFO] [stderr] error: unable to write file slides/rust-training-all-in-one.md
[INFO] [stderr] fatal: unable to checkout working tree
[INFO] [stderr] warning: Clone succeeded, but checkout failed.
[INFO] [stderr] You can inspect what was checked out with 'git status'
[INFO] [stderr] and retry with 'git restore --source=HEAD :/'
[INFO] [stderr] 
[ERROR] this task or one of its parent failed!
[ERROR] failed to checkout https://github.com/tyrchen/rust-training
[ERROR] caused by: command failed: exit status: 128
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.