[INFO] cloning repository https://github.com/nakulbh/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/nakulbh/learning_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnakulbh%2Flearning_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnakulbh%2Flearning_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e37e2899a6116061ad6db1edbe7ea2ff91e28206
[INFO] checking nakulbh/learning_rust against ed77b7b8699e342c2dc842c83cb5fe4025252ee8 for pr-158915-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnakulbh%2Flearning_rust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nakulbh/learning_rust
[INFO] finished tweaking git repo https://github.com/nakulbh/learning_rust
[INFO] tweaked toml for git repo https://github.com/nakulbh/learning_rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nakulbh/learning_rust on toolchain ed77b7b8699e342c2dc842c83cb5fe4025252ee8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed77b7b8699e342c2dc842c83cb5fe4025252ee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nakulbh/learning_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed77b7b8699e342c2dc842c83cb5fe4025252ee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: binary `common_programming_concepts` should have a kebab-case name
[INFO] [stderr]   |
[INFO] [stderr] 1 | /workspace/builds/worker-2-tc1/source/target/.../common_programming_concepts
[INFO] [stderr]   |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `common-programming-concepts`, convert `package.name`
[INFO] [stderr]  --> crates/common_programming_concepts/Cargo.toml:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 - name = "common_programming_concepts"
[INFO] [stderr] 2 + name = "common-programming-concepts"
[INFO] [stderr]   |
[INFO] [stderr] help: to change the binary name to `common-programming-concepts`, specify `bin.name`
[INFO] [stderr]  --> crates/common_programming_concepts/Cargo.toml:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 ~ [dependencies]
[INFO] [stderr] 7 + [[bin]]
[INFO] [stderr] 8 + name = "common-programming-concepts"
[INFO] [stderr] 9 + path = "src/main.rs"
[INFO] [stderr]   |
[INFO] [stderr] warning: `common_programming_concepts` (manifest) generated 1 warning
[INFO] [stderr] warning: binary `my_library` should have a kebab-case name
[INFO] [stderr]   |
[INFO] [stderr] 1 | /workspace/builds/worker-2-tc1/source/target/.../my_library
[INFO] [stderr]   |                                                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `my-library`, convert `package.name`
[INFO] [stderr]  --> crates/my_library/Cargo.toml:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 - name = "my_library"
[INFO] [stderr] 2 + name = "my-library"
[INFO] [stderr]   |
[INFO] [stderr] help: to change the binary name to `my-library`, specify `bin.name`
[INFO] [stderr]  --> crates/my_library/Cargo.toml:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 ~ [dependencies]
[INFO] [stderr] 7 + [[bin]]
[INFO] [stderr] 8 + name = "my-library"
[INFO] [stderr] 9 + path = "src/main.rs"
[INFO] [stderr]   |
[INFO] [stderr] warning: `my_library` (manifest) generated 1 warning
[INFO] [stderr] warning: binary `lru_cache` should have a kebab-case name
[INFO] [stderr]   |
[INFO] [stderr] 1 | /workspace/builds/worker-2-tc1/source/target/.../lru_cache
[INFO] [stderr]   |                                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `lru-cache`, convert `package.name`
[INFO] [stderr]  --> crates/lru_cache/Cargo.toml:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 - name = "lru_cache"
[INFO] [stderr] 2 + name = "lru-cache"
[INFO] [stderr]   |
[INFO] [stderr] help: to change the binary name to `lru-cache`, specify `bin.name`
[INFO] [stderr]  --> crates/lru_cache/Cargo.toml:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 ~ [dependencies]
[INFO] [stderr] 7 + [[bin]]
[INFO] [stderr] 8 + name = "lru-cache"
[INFO] [stderr] 9 + path = "src/main.rs"
[INFO] [stderr]   |
[INFO] [stderr] warning: `lru_cache` (manifest) generated 1 warning
[INFO] [stderr] warning: binary `hello_world` should have a kebab-case name
[INFO] [stderr]   |
[INFO] [stderr] 1 | /workspace/builds/worker-2-tc1/source/target/.../hello_world
[INFO] [stderr]   |                                                  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `hello-world`, convert `package.name`
[INFO] [stderr]  --> crates/hello_world/Cargo.toml:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 - name = "hello_world"
[INFO] [stderr] 2 + name = "hello-world"
[INFO] [stderr]   |
[INFO] [stderr] help: to change the binary name to `hello-world`, specify `bin.name`
[INFO] [stderr]  --> crates/hello_world/Cargo.toml:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 ~ [dependencies]
[INFO] [stderr] 7 + [[bin]]
[INFO] [stderr] 8 + name = "hello-world"
[INFO] [stderr] 9 + path = "src/main.rs"
[INFO] [stderr]   |
[INFO] [stderr] warning: `hello_world` (manifest) generated 1 warning
[INFO] [stderr] warning: binary `guessing_game` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /workspace/builds/worker-2-tc1/source/target/.../guessing_game
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `guessing-game`, convert `package.name`
[INFO] [stderr]   --> crates/guessing_game/Cargo.toml:2:8
[INFO] [stderr]    |
[INFO] [stderr]  2 - name = "guessing_game"
[INFO] [stderr]  2 + name = "guessing-game"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `guessing-game`, specify `bin.name`
[INFO] [stderr]   --> crates/guessing_game/Cargo.toml:7:16
[INFO] [stderr]    |
[INFO] [stderr]  7 ~ rand = "0.8.5"
[INFO] [stderr]  8 + [[bin]]
[INFO] [stderr]  9 + name = "guessing-game"
[INFO] [stderr] 10 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `guessing_game` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds


overridden task result to prepare-fail:timeout

Caused by:
    0: uncategorized prepare error
    1: no output for 300 seconds