[INFO] fetching crate sabre-lang 0.5.0...
[INFO] checking sabre-lang-0.5.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate sabre-lang 0.5.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate sabre-lang 0.5.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sabre-lang 0.5.0
[INFO] finished tweaking crates.io crate sabre-lang 0.5.0
[INFO] tweaked toml for crates.io crate sabre-lang 0.5.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate sabre-lang 0.5.0 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rust-embed-impl v5.7.0
[INFO] [stderr]   Downloaded llvm-sys v100.2.0
[INFO] [stderr]   Downloaded inkwell_internals v0.3.0
[INFO] [stderr]   Downloaded inkwell v0.1.0-beta.2
[INFO] [stderr]   Downloaded rust-embed v5.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cafa56ab557fe5da882b548b3c5438414f366a9718391a45b085b52fdea9f69
[INFO] running `Command { std: "docker" "start" "-a" "6cafa56ab557fe5da882b548b3c5438414f366a9718391a45b085b52fdea9f69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cafa56ab557fe5da882b548b3c5438414f366a9718391a45b085b52fdea9f69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cafa56ab557fe5da882b548b3c5438414f366a9718391a45b085b52fdea9f69", kill_on_drop: false }`
[INFO] [stdout] 6cafa56ab557fe5da882b548b3c5438414f366a9718391a45b085b52fdea9f69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b90cb8f133474456367f665b2b47397889c653506dc37bc0573f9e8ae1b8e428
[INFO] running `Command { std: "docker" "start" "-a" "b90cb8f133474456367f665b2b47397889c653506dc37bc0573f9e8ae1b8e428", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rust-embed-utils v5.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling rust-embed-impl v5.7.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking rust-embed v5.7.0
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking sabre-lang v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/ast/mod.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Module {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 29 |     pub path: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Module` 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 `fields` is never read
[INFO] [stdout]   --> src/ast/mod.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct StructDef {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 63 |     pub name: String,
[INFO] [stdout] 64 |     pub fields: Vec<Variable>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructDef` 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/ast/mod.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Module {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 29 |     pub path: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Module` 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 `fields` is never read
[INFO] [stdout]   --> src/ast/mod.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct StructDef {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 63 |     pub name: String,
[INFO] [stdout] 64 |     pub fields: Vec<Variable>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructDef` 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.02s
[INFO] running `Command { std: "docker" "inspect" "b90cb8f133474456367f665b2b47397889c653506dc37bc0573f9e8ae1b8e428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b90cb8f133474456367f665b2b47397889c653506dc37bc0573f9e8ae1b8e428", kill_on_drop: false }`
[INFO] [stdout] b90cb8f133474456367f665b2b47397889c653506dc37bc0573f9e8ae1b8e428