[INFO] cloning repository https://github.com/Geemili/mdproof
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Geemili/mdproof" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeemili%2Fmdproof", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeemili%2Fmdproof'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7cbd275d01f9eb25acf04c258ad2aa6878ce9151
[INFO] checking Geemili/mdproof against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeemili%2Fmdproof" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Geemili/mdproof
[INFO] finished tweaking git repo https://github.com/Geemili/mdproof
[INFO] tweaked toml for git repo https://github.com/Geemili/mdproof written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Geemili/mdproof on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Geemili/mdproof 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eda323cc6f56604daf2dd2525b22fdec03a881e6c1ce716f294b9f9e958ebf35
[INFO] running `Command { std: "docker" "start" "-a" "eda323cc6f56604daf2dd2525b22fdec03a881e6c1ce716f294b9f9e958ebf35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eda323cc6f56604daf2dd2525b22fdec03a881e6c1ce716f294b9f9e958ebf35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eda323cc6f56604daf2dd2525b22fdec03a881e6c1ce716f294b9f9e958ebf35", kill_on_drop: false }`
[INFO] [stdout] eda323cc6f56604daf2dd2525b22fdec03a881e6c1ce716f294b9f9e958ebf35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ddd92c97750a0b4a8df5fa75c2ace23237be241fc72a7e32c3b59d403bb0b1d
[INFO] running `Command { std: "docker" "start" "-a" "1ddd92c97750a0b4a8df5fa75c2ace23237be241fc72a7e32c3b59d403bb0b1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking bitflags v1.0.4
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[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking arrayvec v0.4.8
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]    Compiling num-iter v0.1.37
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[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking atty v0.2.11
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[INFO] [stderr]    Compiling serde v1.0.80
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[INFO] [stderr]     Checking flate2 v0.2.20
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[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]     Checking failure v0.1.3
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[INFO] [stderr]     Checking mdproof v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/atomizer.rs:49:10
[INFO] [stdout]    |
[INFO] [stdout] 49 |     List(Option<usize>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BlockTag` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 49 -     List(Option<usize>),
[INFO] [stdout] 49 +     List(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `queue_font` is never used
[INFO] [stdout]   --> src/resources.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait Loader {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] 21 |     fn queue_font(&mut self, path: &str);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_config` is never used
[INFO] [stdout]   --> src/resources.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl Resources {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn set_config(&mut self, config: Config) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `BlockQuote`, `Note`, `Link`, and `Superscript` are never constructed
[INFO] [stdout]   --> src/style.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub enum Class {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     BlockQuote(u8),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     Note,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     Link,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     Superscript,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Class` 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: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/resources.rs:86:21
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn get_font(&self, path: &str) -> Option<&Font> {
[INFO] [stdout]    |                     ^^^^^                        ^^^^^
[INFO] [stdout]    |                     |                            ||
[INFO] [stdout]    |                     |                            |the same lifetime is hidden here
[INFO] [stdout]    |                     |                            the same lifetime is elided here
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn get_font(&self, path: &str) -> Option<&Font<'_>> {
[INFO] [stdout]    |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/atomizer.rs:49:10
[INFO] [stdout]    |
[INFO] [stdout] 49 |     List(Option<usize>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BlockTag` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 49 -     List(Option<usize>),
[INFO] [stdout] 49 +     List(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `queue_font` is never used
[INFO] [stdout]   --> src/resources.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait Loader {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] 21 |     fn queue_font(&mut self, path: &str);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_config` is never used
[INFO] [stdout]   --> src/resources.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl Resources {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn set_config(&mut self, config: Config) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `BlockQuote`, `Note`, `Link`, and `Superscript` are never constructed
[INFO] [stdout]   --> src/style.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub enum Class {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     BlockQuote(u8),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     Note,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     Link,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     Superscript,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Class` 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: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/resources.rs:86:21
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn get_font(&self, path: &str) -> Option<&Font> {
[INFO] [stdout]    |                     ^^^^^                        ^^^^^
[INFO] [stdout]    |                     |                            ||
[INFO] [stdout]    |                     |                            |the same lifetime is hidden here
[INFO] [stdout]    |                     |                            the same lifetime is elided here
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn get_font(&self, path: &str) -> Option<&Font<'_>> {
[INFO] [stdout]    |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/mdproof.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Debug, self::StructOpt)]
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `self::StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdproof` (bin "mdproof" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/mdproof.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Debug, self::StructOpt)]
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `self::StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdproof` (bin "mdproof") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1ddd92c97750a0b4a8df5fa75c2ace23237be241fc72a7e32c3b59d403bb0b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ddd92c97750a0b4a8df5fa75c2ace23237be241fc72a7e32c3b59d403bb0b1d", kill_on_drop: false }`
[INFO] [stdout] 1ddd92c97750a0b4a8df5fa75c2ace23237be241fc72a7e32c3b59d403bb0b1d
