[INFO] fetching crate egg 0.6.0...
[INFO] documenting egg-0.6.0 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate egg 0.6.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate egg 0.6.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", 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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35d604980997af699562b0275d08dc152754291c8a099e55fb300b79baf090fa
[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" "35d604980997af699562b0275d08dc152754291c8a099e55fb300b79baf090fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35d604980997af699562b0275d08dc152754291c8a099e55fb300b79baf090fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35d604980997af699562b0275d08dc152754291c8a099e55fb300b79baf090fa", kill_on_drop: false }`
[INFO] [stdout] 35d604980997af699562b0275d08dc152754291c8a099e55fb300b79baf090fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e34d8b2993c8cfe968466abf952146dad35cfd54c696906b9ce8bb7c948e082
[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" "4e34d8b2993c8cfe968466abf952146dad35cfd54c696906b9ce8bb7c948e082", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking symbolic_expressions v5.0.3
[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]    |                                      ^ the module `_01_background` contains no item named `σ`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(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]    |       ^ the module `_01_background` contains no item named `σ`
[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]    |                                               ^ the module `_01_background` contains no item named `σ`
[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]     |                             ^ the module `_01_background` contains no item named `σ`
[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]     |                                        ^^^^^^ the module `macros` contains no item named `macros`
[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 2.42s
[INFO] running `Command { std: "docker" "inspect" "4e34d8b2993c8cfe968466abf952146dad35cfd54c696906b9ce8bb7c948e082", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e34d8b2993c8cfe968466abf952146dad35cfd54c696906b9ce8bb7c948e082", kill_on_drop: false }`
[INFO] [stdout] 4e34d8b2993c8cfe968466abf952146dad35cfd54c696906b9ce8bb7c948e082
