[INFO] cloning repository https://github.com/dust-zed/markdown_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dust-zed/markdown_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdust-zed%2Fmarkdown_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdust-zed%2Fmarkdown_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2b7ba72fc5a94363b37378e163f3c7109576983
[INFO] checking dust-zed/markdown_engine against master#be181dd75c83d72fcc95538e235768bc367b76b9 for pr-140208
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdust-zed%2Fmarkdown_engine" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dust-zed/markdown_engine on toolchain be181dd75c83d72fcc95538e235768bc367b76b9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+be181dd75c83d72fcc95538e235768bc367b76b9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dust-zed/markdown_engine
[INFO] finished tweaking git repo https://github.com/dust-zed/markdown_engine
[INFO] tweaked toml for git repo https://github.com/dust-zed/markdown_engine written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dust-zed/markdown_engine 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" "+be181dd75c83d72fcc95538e235768bc367b76b9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+be181dd75c83d72fcc95538e235768bc367b76b9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27d2e974471c594241112096c8b9d0a7402a2e27b6ac65e4089a34b09f1aea7c
[INFO] running `Command { std: "docker" "start" "-a" "27d2e974471c594241112096c8b9d0a7402a2e27b6ac65e4089a34b09f1aea7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27d2e974471c594241112096c8b9d0a7402a2e27b6ac65e4089a34b09f1aea7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27d2e974471c594241112096c8b9d0a7402a2e27b6ac65e4089a34b09f1aea7c", kill_on_drop: false }`
[INFO] [stdout] 27d2e974471c594241112096c8b9d0a7402a2e27b6ac65e4089a34b09f1aea7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+be181dd75c83d72fcc95538e235768bc367b76b9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9ac943b46517c670e9af68ba3b23272db65bc3049089c81ab6fd901f841e789
[INFO] running `Command { std: "docker" "start" "-a" "e9ac943b46517c670e9af68ba3b23272db65bc3049089c81ab6fd901f841e789", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]     Checking either v1.14.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.139
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking itoa v1.0.14
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking half v2.4.1
[INFO] [stderr]     Checking os_str_bytes v6.6.1
[INFO] [stderr]     Checking ryu v1.0.19
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking chars v0.1.0 (/opt/rustwide/workdir/chars)
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stdout] warning: constant `BUF_SIZE` is never used
[INFO] [stdout]  --> chars/src/lib.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | const BUF_SIZE: usize = 4;
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chars` is never constructed
[INFO] [stdout]   --> chars/src/lib.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Chars<'a> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `cur_char` are never used
[INFO] [stdout]   --> chars/src/lib.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl<'a> Chars<'a> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 23 |     fn new<P: AsRef<Path>>(path: P) -> io::Result<Self> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn cur_char(&mut self) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking textwrap v0.16.1
[INFO] [stderr]     Checking u8unit v0.1.0 (/opt/rustwide/workdir/u8unit)
[INFO] [stderr]     Checking oorandom v11.1.4
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking mrakdown_engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stdout] warning: fields `msg`, `line_num`, and `column_num` are never read
[INFO] [stdout]   --> src/parser.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct SyntaxError {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 16 |     msg: CowStr,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 17 |     line_num: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     column_num: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SyntaxError` 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: struct `Record` is never constructed
[INFO] [stdout]   --> src/parser.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Record {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `schema` is never read
[INFO] [stdout]  --> src/mapper.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Mapper<S: Schema, W: Writer> {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     schema: S,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]    Compiling serde_derive v1.0.218
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: fields `msg`, `line_num`, and `column_num` are never read
[INFO] [stdout]   --> src/parser.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct SyntaxError {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 16 |     msg: CowStr,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 17 |     line_num: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     column_num: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SyntaxError` 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: struct `Record` is never constructed
[INFO] [stdout]   --> src/parser.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Record {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `schema` is never read
[INFO] [stdout]  --> src/mapper.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Mapper<S: Schema, W: Writer> {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     schema: S,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.75s
[INFO] running `Command { std: "docker" "inspect" "e9ac943b46517c670e9af68ba3b23272db65bc3049089c81ab6fd901f841e789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9ac943b46517c670e9af68ba3b23272db65bc3049089c81ab6fd901f841e789", kill_on_drop: false }`
[INFO] [stdout] e9ac943b46517c670e9af68ba3b23272db65bc3049089c81ab6fd901f841e789