[INFO] fetching crate egg 0.6.0...
[INFO] documenting egg-0.6.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate egg 0.6.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate egg 0.6.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate egg 0.6.0
[INFO] finished tweaking crates.io crate egg 0.6.0
[INFO] tweaked toml for crates.io crate egg 0.6.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded symbolic_expressions v5.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 379775e86a023345799cc0403203765a7e406a1d2714f881508ba9a4fa73908d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "379775e86a023345799cc0403203765a7e406a1d2714f881508ba9a4fa73908d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "379775e86a023345799cc0403203765a7e406a1d2714f881508ba9a4fa73908d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "379775e86a023345799cc0403203765a7e406a1d2714f881508ba9a4fa73908d", kill_on_drop: false }`
[INFO] [stdout] 379775e86a023345799cc0403203765a7e406a1d2714f881508ba9a4fa73908d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "RUSTDOCFLAGS=--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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2d8744d232438df26f6e75cdc09c2ead478f31443d04b316368ec456fe567e48
[INFO] running `Command { std: "docker" "start" "-a" "2d8744d232438df26f6e75cdc09c2ead478f31443d04b316368ec456fe567e48", kill_on_drop: false }`
[INFO] [stderr]     Checking symbolic_expressions v5.0.3
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]  Documenting egg v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `σ`
[INFO] [stdout]   --> src/tutorials/_01_background.rs:44:38
[INFO] [stdout]    |
[INFO] [stdout] 44 | - Applying the substitution gives _r[σ] =_ 2 × 7.
[INFO] [stdout]    |                                      ^ no item named `σ` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `σ`
[INFO] [stdout]   --> src/tutorials/_01_background.rs:45:7
[INFO] [stdout]    |
[INFO] [stdout] 45 |   (_r[σ]_ means apply the substitution _σ_ to _r_)
[INFO] [stdout]    |       ^ no item named `σ` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `σ`
[INFO] [stdout]   --> src/tutorials/_01_background.rs:46:47
[INFO] [stdout]    |
[INFO] [stdout] 46 | - Replacing the matched subterm 7 + 7 with _r[σ] =_ 2 × 7 gives the result: 42 × (2 × 7).
[INFO] [stdout]    |                                               ^ no item named `σ` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `σ`
[INFO] [stdout]    --> src/tutorials/_01_background.rs:140:29
[INFO] [stdout]     |
[INFO] [stdout] 140 | Then, you `add` the term _r[σ]_ to the e-graph
[INFO] [stdout]     |                             ^ no item named `σ` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `macros`
[INFO] [stdout]    --> src/macros.rs:210:40
[INFO] [stdout]     |
[INFO] [stdout] 210 | token tree (see the [macros reference][macros] for more info).
[INFO] [stdout]     |                                        ^^^^^^ no item named `macros` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.74s
[INFO] running `Command { std: "docker" "inspect" "2d8744d232438df26f6e75cdc09c2ead478f31443d04b316368ec456fe567e48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d8744d232438df26f6e75cdc09c2ead478f31443d04b316368ec456fe567e48", kill_on_drop: false }`
[INFO] [stdout] 2d8744d232438df26f6e75cdc09c2ead478f31443d04b316368ec456fe567e48
