[INFO] cloning repository https://github.com/wyhhh/md_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wyhhh/md_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyhhh%2Fmd_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyhhh%2Fmd_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7685828dad6314e2e5e8986a4ae592d7a62e6c5e
[INFO] testing wyhhh/md_engine against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyhhh%2Fmd_engine" "/workspace/builds/worker-90/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-90/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wyhhh/md_engine on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wyhhh/md_engine
[INFO] finished tweaking git repo https://github.com/wyhhh/md_engine
[INFO] tweaked toml for git repo https://github.com/wyhhh/md_engine written to /workspace/builds/worker-90/source/Cargo.toml
[INFO] crate git repo https://github.com/wyhhh/md_engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f9932ddeb10bdd8873bee8cd4b3774c093ca3833fa04b28819c8dd902dd99fc
[INFO] running `Command { std: "docker" "start" "-a" "0f9932ddeb10bdd8873bee8cd4b3774c093ca3833fa04b28819c8dd902dd99fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f9932ddeb10bdd8873bee8cd4b3774c093ca3833fa04b28819c8dd902dd99fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f9932ddeb10bdd8873bee8cd4b3774c093ca3833fa04b28819c8dd902dd99fc", kill_on_drop: false }`
[INFO] [stdout] 0f9932ddeb10bdd8873bee8cd4b3774c093ca3833fa04b28819c8dd902dd99fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 773934c4bdddbd4c34f1640fda49c0ac53306a9e090d3586bf341922aeacf982
[INFO] running `Command { std: "docker" "start" "-a" "773934c4bdddbd4c34f1640fda49c0ac53306a9e090d3586bf341922aeacf982", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling chr v0.1.0 (/opt/rustwide/workdir/chr)
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling enum_len v0.1.0 (/opt/rustwide/workdir/enum_len)
[INFO] [stderr]    Compiling md_engine v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]    --> src/parser.rs:181:44
[INFO] [stdout]     |
[INFO] [stdout] 181 | ...                   Token::Tag(tag) => unreachable!(),
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char_len`
[INFO] [stdout]    --> src/parser.rs:182:57
[INFO] [stdout]     |
[INFO] [stdout] 182 | ...                   Token::PureText { data, char_len } => {
[INFO] [stdout]     |                                               ^^^^^^^^ help: try ignoring the field: `char_len: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char_len`
[INFO] [stdout]    --> src/parser.rs:204:57
[INFO] [stdout]     |
[INFO] [stdout] 204 | ...                   Token::PureText { data, char_len } => {
[INFO] [stdout]     |                                               ^^^^^^^^ help: try ignoring the field: `char_len: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char_len`
[INFO] [stdout]    --> src/parser.rs:224:57
[INFO] [stdout]     |
[INFO] [stdout] 224 | ...                   Token::PureText { data, char_len } => {
[INFO] [stdout]     |                                               ^^^^^^^^ help: try ignoring the field: `char_len: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/tokenizer.rs:319:31
[INFO] [stdout]     |
[INFO] [stdout] 319 |             Token::PureText { data, char_len } => char_len,
[INFO] [stdout]     |                               ^^^^ help: try ignoring the field: `data: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn new<S: Into<CowStr>>(msg: S, line_num: u32, column_num: u32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trace_macros)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `md_engine` due to 2 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "773934c4bdddbd4c34f1640fda49c0ac53306a9e090d3586bf341922aeacf982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "773934c4bdddbd4c34f1640fda49c0ac53306a9e090d3586bf341922aeacf982", kill_on_drop: false }`
[INFO] [stdout] 773934c4bdddbd4c34f1640fda49c0ac53306a9e090d3586bf341922aeacf982