[INFO] cloning repository https://github.com/wucheng/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wucheng/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwucheng%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwucheng%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31af7426ee4af600f3c11e98886b3cc44e46af88
[INFO] checking wucheng/leetcode-rust against try#099af82bc034c1e4895c90e5407fafdd61976cdb for pr-145457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwucheng%2Fleetcode-rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wucheng/leetcode-rust
[INFO] finished tweaking git repo https://github.com/wucheng/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/wucheng/leetcode-rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wucheng/leetcode-rust on toolchain 099af82bc034c1e4895c90e5407fafdd61976cdb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wucheng/leetcode-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" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1faac5e29a713b700466e6b16d31ffca33fc2e001276bf7674b8f52d1a87847c
[INFO] running `Command { std: "docker" "start" "-a" "1faac5e29a713b700466e6b16d31ffca33fc2e001276bf7674b8f52d1a87847c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1faac5e29a713b700466e6b16d31ffca33fc2e001276bf7674b8f52d1a87847c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1faac5e29a713b700466e6b16d31ffca33fc2e001276bf7674b8f52d1a87847c", kill_on_drop: false }`
[INFO] [stdout] 1faac5e29a713b700466e6b16d31ffca33fc2e001276bf7674b8f52d1a87847c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 430334cc638e3c085b3c1e0f0cc99b10ebd8fbe13554d669fffe827b7f9fc604
[INFO] running `Command { std: "docker" "start" "-a" "430334cc638e3c085b3c1e0f0cc99b10ebd8fbe13554d669fffe827b7f9fc604", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking leetcode_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute `warn`
[INFO] [stdout]   --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         #[warn(unreachable_code)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the built-in attribute `warn` will be ignored, since it's applied to the macro invocation `unreachable`
[INFO] [stdout]   --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         unreachable!()
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute `warn`
[INFO] [stdout]   --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         #[warn(unreachable_code)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the built-in attribute `warn` will be ignored, since it's applied to the macro invocation `unreachable`
[INFO] [stdout]   --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         unreachable!()
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout]  9 | /         match (t1, t2) {
[INFO] [stdout] 10 | |             (None, None) => return None,
[INFO] [stdout] 11 | |             (Some(t1_rc), None) => return Some(t1_rc.clone()),
[INFO] [stdout] 12 | |             (None, Some(t2_rc)) => return Some(t2_rc.clone()),
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |         }
[INFO] [stdout]    | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 24 |           #[warn(unreachable_code)]
[INFO] [stdout] 25 |           unreachable!()
[INFO] [stdout]    |           ^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout]  9 | /         match (t1, t2) {
[INFO] [stdout] 10 | |             (None, None) => return None,
[INFO] [stdout] 11 | |             (Some(t1_rc), None) => return Some(t1_rc.clone()),
[INFO] [stdout] 12 | |             (None, Some(t2_rc)) => return Some(t2_rc.clone()),
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |         }
[INFO] [stdout]    | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 24 |           #[warn(unreachable_code)]
[INFO] [stdout] 25 |           unreachable!()
[INFO] [stdout]    |           ^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `leetcode_rust` (lib); 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/099af82bc034c1e4895c90e5407fafdd61976cdb/bin/rustc --crate-name leetcode_rust --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=bad90bc5d2d12be2 -C extra-filename=-3ddc2296c841c5ef --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern rand=/opt/rustwide/target/debug/deps/librand-9854b5096d376fb8.rmeta --cap-lints=forbid` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `leetcode_rust` (lib test); 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/099af82bc034c1e4895c90e5407fafdd61976cdb/bin/rustc --crate-name leetcode_rust --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=6215368757c57f22 -C extra-filename=-3e70466403b7f514 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern rand=/opt/rustwide/target/debug/deps/librand-9854b5096d376fb8.rmeta --cap-lints=forbid` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "430334cc638e3c085b3c1e0f0cc99b10ebd8fbe13554d669fffe827b7f9fc604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "430334cc638e3c085b3c1e0f0cc99b10ebd8fbe13554d669fffe827b7f9fc604", kill_on_drop: false }`
[INFO] [stdout] 430334cc638e3c085b3c1e0f0cc99b10ebd8fbe13554d669fffe827b7f9fc604