[INFO] updating cached repository https://github.com/albfan/rust-tree-sitter-ast-viewer
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c78b9692af1cbfe0e60c9d3f1e75dd8c426822c0
[INFO] checking albfan/rust-tree-sitter-ast-viewer against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbfan%2Frust-tree-sitter-ast-viewer" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/albfan/rust-tree-sitter-ast-viewer on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/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 `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 79c5dda2fc1654dcac88715a43dbdf8f19c492ca5cac47ebfac0ec2f01f4ff42
[INFO] running `"docker" "start" "-a" "79c5dda2fc1654dcac88715a43dbdf8f19c492ca5cac47ebfac0ec2f01f4ff42"`
[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] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> build.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> build.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut parser_dir: PathBuf = ["fixtures", path.unwrap().file_name().to_str().unwrap(), "src"].iter().collect();
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `language` is never read
[INFO] [stderr]   --> src/main.rs:34:11
[INFO] [stderr]    |
[INFO] [stderr] 34 |   let mut language = unsafe { tree_sitter_rust() };
[INFO] [stderr]    |           ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `tree_sitter_python`
[INFO] [stderr]   --> src/main.rs:12:16
[INFO] [stderr]    |
[INFO] [stderr] 12 |   extern "C" { fn tree_sitter_python() -> Language; }
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `tree_sitter_ruby`
[INFO] [stderr]   --> src/main.rs:13:16
[INFO] [stderr]    |
[INFO] [stderr] 13 |   extern "C" { fn tree_sitter_ruby() -> Language; }
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `tree_sitter_haskell`
[INFO] [stderr]   --> src/main.rs:14:16
[INFO] [stderr]    |
[INFO] [stderr] 14 |   extern "C" { fn tree_sitter_haskell() -> Language; }
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `tree_sitter_cpp`
[INFO] [stderr]   --> src/main.rs:15:16
[INFO] [stderr]    |
[INFO] [stderr] 15 |   extern "C" { fn tree_sitter_cpp() -> Language; }
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `tree_sitter_bash`
[INFO] [stderr]   --> src/main.rs:17:16
[INFO] [stderr]    |
[INFO] [stderr] 17 |   extern "C" { fn tree_sitter_bash() -> Language; }
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: foreign function is never used: `tree_sitter_php`
[INFO] [stderr]   --> src/main.rs:20:16
[INFO] [stderr]    |
[INFO] [stderr] 20 |   extern "C" { fn tree_sitter_php() -> Language; }
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `language` is never read
[INFO] [stderr]   --> src/main.rs:34:11
[INFO] [stderr]    |
[INFO] [stderr] 34 |   let mut language = unsafe { tree_sitter_rust() };
[INFO] [stderr]    |           ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.02s
[INFO] running `"docker" "inspect" "79c5dda2fc1654dcac88715a43dbdf8f19c492ca5cac47ebfac0ec2f01f4ff42"`
[INFO] running `"docker" "rm" "-f" "79c5dda2fc1654dcac88715a43dbdf8f19c492ca5cac47ebfac0ec2f01f4ff42"`
[INFO] [stdout] 79c5dda2fc1654dcac88715a43dbdf8f19c492ca5cac47ebfac0ec2f01f4ff42