[INFO] fetching crate sylt-compiler 0.1.0...
[INFO] checking sylt-compiler-0.1.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate sylt-compiler 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate sylt-compiler 0.1.0
[INFO] finished tweaking crates.io crate sylt-compiler 0.1.0
[INFO] tweaked toml for crates.io crate sylt-compiler 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sylt-compiler 0.1.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sylt-tokenizer v0.1.0
[INFO] [stderr]   Downloaded sylt-macro v0.1.0
[INFO] [stderr]   Downloaded sylt-common v0.1.0
[INFO] [stderr]   Downloaded owo-colors v2.1.0
[INFO] [stderr]   Downloaded sylt-parser v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d2720dec43702642178d02a08dc06d19d38328a14ca6ca19e9dc2aa66535287
[INFO] running `Command { std: "docker" "start" "-a" "6d2720dec43702642178d02a08dc06d19d38328a14ca6ca19e9dc2aa66535287", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d2720dec43702642178d02a08dc06d19d38328a14ca6ca19e9dc2aa66535287", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d2720dec43702642178d02a08dc06d19d38328a14ca6ca19e9dc2aa66535287", kill_on_drop: false }`
[INFO] [stdout] 6d2720dec43702642178d02a08dc06d19d38328a14ca6ca19e9dc2aa66535287
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bccf37aec468ef465e0c19974201fc9e865776a916114b0bf463fa46dc9181d5
[INFO] running `Command { std: "docker" "start" "-a" "bccf37aec468ef465e0c19974201fc9e865776a916114b0bf463fa46dc9181d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling beef v0.5.2
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]     Checking owo-colors v2.1.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling logos-derive v0.12.1
[INFO] [stderr]    Compiling sylt-macro v0.1.0
[INFO] [stderr]     Checking logos v0.12.1
[INFO] [stderr]     Checking sylt-tokenizer v0.1.0
[INFO] [stderr]     Checking sylt-common v0.1.0
[INFO] [stderr]     Checking sylt-parser v0.1.0
[INFO] [stderr]     Checking sylt-compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `line` and `kind` are never read
[INFO] [stdout]   --> src/compiler.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Upvalue {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 50 |     line: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 51 |     kind: VarKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Upvalue` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `scope` is never read
[INFO] [stdout]   --> src/compiler.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 84 | struct Context {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 87 |     scope: usize,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `line` and `kind` are never read
[INFO] [stdout]   --> src/compiler.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Upvalue {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 50 |     line: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 51 |     kind: VarKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Upvalue` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `scope` is never read
[INFO] [stdout]   --> src/compiler.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 84 | struct Context {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 87 |     scope: usize,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.89s
[INFO] running `Command { std: "docker" "inspect" "bccf37aec468ef465e0c19974201fc9e865776a916114b0bf463fa46dc9181d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bccf37aec468ef465e0c19974201fc9e865776a916114b0bf463fa46dc9181d5", kill_on_drop: false }`
[INFO] [stdout] bccf37aec468ef465e0c19974201fc9e865776a916114b0bf463fa46dc9181d5