[INFO] cloning repository https://github.com/albfan/rust-tree-sitter-ast-viewer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/albfan/rust-tree-sitter-ast-viewer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbfan%2Frust-tree-sitter-ast-viewer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbfan%2Frust-tree-sitter-ast-viewer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c78b9692af1cbfe0e60c9d3f1e75dd8c426822c0
[INFO] documenting albfan/rust-tree-sitter-ast-viewer against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbfan%2Frust-tree-sitter-ast-viewer" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/albfan/rust-tree-sitter-ast-viewer on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/albfan/rust-tree-sitter-ast-viewer
[INFO] finished tweaking git repo https://github.com/albfan/rust-tree-sitter-ast-viewer
[INFO] tweaked toml for git repo https://github.com/albfan/rust-tree-sitter-ast-viewer written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/albfan/rust-tree-sitter-ast-viewer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cde1a773ea09da1a3b90789f6d5584fda0ed4ccc7dcbc3fef945697b1ed531e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6cde1a773ea09da1a3b90789f6d5584fda0ed4ccc7dcbc3fef945697b1ed531e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cde1a773ea09da1a3b90789f6d5584fda0ed4ccc7dcbc3fef945697b1ed531e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cde1a773ea09da1a3b90789f6d5584fda0ed4ccc7dcbc3fef945697b1ed531e", kill_on_drop: false }`
[INFO] [stdout] 6cde1a773ea09da1a3b90789f6d5584fda0ed4ccc7dcbc3fef945697b1ed531e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e52861497ce34c471b211c8995a57e10089780779b62a80583495b4ab97a0d50
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e52861497ce34c471b211c8995a57e10089780779b62a80583495b4ab97a0d50", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling tree-sitter v0.3.4 (https://github.com/tree-sitter/rust-tree-sitter#85347541)
[INFO] [stderr]    Compiling tree-sitter-ast-viewer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> build.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> build.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let mut parser_dir: PathBuf = ["fixtures", path.unwrap().file_name().to_str().unwrap(), "src"].iter().collect();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking memchr v2.1.2
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr] warning: In file included from vendor/tree-sitter/src/runtime/runtime.c:9:
[INFO] [stderr] warning: vendor/tree-sitter/src/runtime/get_changed_ranges.c: In function 'ts_subtree_get_changed_ranges':
[INFO] [stderr] warning: vendor/tree-sitter/src/runtime/get_changed_ranges.c:373:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   373 |         if (ts_range_array_intersects(
[INFO] [stderr] warning:       |            ^
[INFO] [stderr] warning: vendor/tree-sitter/src/runtime/get_changed_ranges.c:384:7: note: here
[INFO] [stderr] warning:   384 |       case IteratorMayDiffer:
[INFO] [stderr] warning:       |       ^~~~
[INFO] [stderr]  Documenting tree-sitter-ast-viewer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.95s
[INFO] running `Command { std: "docker" "inspect" "e52861497ce34c471b211c8995a57e10089780779b62a80583495b4ab97a0d50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e52861497ce34c471b211c8995a57e10089780779b62a80583495b4ab97a0d50", kill_on_drop: false }`
[INFO] [stdout] e52861497ce34c471b211c8995a57e10089780779b62a80583495b4ab97a0d50