[INFO] fetching crate rst_parser 0.4.0...
[INFO] checking rst_parser-0.4.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate rst_parser 0.4.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rst_parser 0.4.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rst_parser 0.4.0
[INFO] finished tweaking crates.io crate rst_parser 0.4.0
[INFO] tweaked toml for crates.io crate rst_parser 0.4.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 52 packages
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded document_tree v0.4.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1027aa3534738db46d7446676fa89198e300fb1ba4088cbbe34f5f94dde8174f
[INFO] running `Command { std: "docker" "start" "-a" "1027aa3534738db46d7446676fa89198e300fb1ba4088cbbe34f5f94dde8174f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1027aa3534738db46d7446676fa89198e300fb1ba4088cbbe34f5f94dde8174f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1027aa3534738db46d7446676fa89198e300fb1ba4088cbbe34f5f94dde8174f", kill_on_drop: false }`
[INFO] [stdout] 1027aa3534738db46d7446676fa89198e300fb1ba4088cbbe34f5f94dde8174f
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c9e486225be76bb14251cb981c70cf419f18da74d6bd949ca13e3b53428909f
[INFO] running `Command { std: "docker" "start" "-a" "8c9e486225be76bb14251cb981c70cf419f18da74d6bd949ca13e3b53428909f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
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[INFO] [stderr]    Compiling ucd-trie v0.1.6
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[INFO] [stderr]     Checking aho-corasick v1.1.3
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[INFO] [stderr]     Checking unicode-normalization v0.1.23
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[INFO] [stderr]     Checking rst_parser v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `NumberedFootnote`, `LabeledFootnote`, `Citation`, `InternalLink`, `IndirectLink`, and `SectionTitle` are never constructed
[INFO] [stdout]   --> src/simplify.rs:37:2
[INFO] [stdout]    |
[INFO] [stdout] 36 | enum NamedTargetType {
[INFO] [stdout]    |      --------------- variants in this enum
[INFO] [stdout] 37 |     NumberedFootnote(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     LabeledFootnote(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 39 |     Citation,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 40 |     InternalLink,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 41 |     ExternalLink(Url),
[INFO] [stdout] 42 |     IndirectLink(NameToken),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     SectionTitle,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NamedTargetType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implicit_target` is never used
[INFO] [stdout]   --> src/simplify.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl NamedTargetType {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] 46 |     fn is_implicit_target(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NumberedFootnote`, `LabeledFootnote`, `Citation`, `InternalLink`, `IndirectLink`, and `SectionTitle` are never constructed
[INFO] [stdout]   --> src/simplify.rs:37:2
[INFO] [stdout]    |
[INFO] [stdout] 36 | enum NamedTargetType {
[INFO] [stdout]    |      --------------- variants in this enum
[INFO] [stdout] 37 |     NumberedFootnote(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     LabeledFootnote(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 39 |     Citation,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 40 |     InternalLink,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 41 |     ExternalLink(Url),
[INFO] [stdout] 42 |     IndirectLink(NameToken),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     SectionTitle,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NamedTargetType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implicit_target` is never used
[INFO] [stdout]   --> src/simplify.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl NamedTargetType {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] 46 |     fn is_implicit_target(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.81s
[INFO] running `Command { std: "docker" "inspect" "8c9e486225be76bb14251cb981c70cf419f18da74d6bd949ca13e3b53428909f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c9e486225be76bb14251cb981c70cf419f18da74d6bd949ca13e3b53428909f", kill_on_drop: false }`
[INFO] [stdout] 8c9e486225be76bb14251cb981c70cf419f18da74d6bd949ca13e3b53428909f