[INFO] cloning repository https://github.com/bkase/jsonschema-to-dhall
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bkase/jsonschema-to-dhall" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbkase%2Fjsonschema-to-dhall", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbkase%2Fjsonschema-to-dhall'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc6c14b615b42f35157db29077530223638dbfd9
[INFO] documenting bkase/jsonschema-to-dhall against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbkase%2Fjsonschema-to-dhall" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bkase/jsonschema-to-dhall on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bkase/jsonschema-to-dhall
[INFO] finished tweaking git repo https://github.com/bkase/jsonschema-to-dhall
[INFO] tweaked toml for git repo https://github.com/bkase/jsonschema-to-dhall written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/bkase/jsonschema-to-dhall already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded schemars v0.7.2
[INFO] [stderr]   Downloaded schemars_derive v0.7.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eda0bc2dd57ca45c04641a85aec31839bd5fd378801d6a4a08b098111b50cd37
[INFO] running `Command { std: "docker" "start" "-a" "eda0bc2dd57ca45c04641a85aec31839bd5fd378801d6a4a08b098111b50cd37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eda0bc2dd57ca45c04641a85aec31839bd5fd378801d6a4a08b098111b50cd37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eda0bc2dd57ca45c04641a85aec31839bd5fd378801d6a4a08b098111b50cd37", kill_on_drop: false }`
[INFO] [stdout] eda0bc2dd57ca45c04641a85aec31839bd5fd378801d6a4a08b098111b50cd37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81af867878699d2c418b44712abb9af75dd8d00acc423b5f34132a5f3e701811
[INFO] running `Command { std: "docker" "start" "-a" "81af867878699d2c418b44712abb9af75dd8d00acc423b5f34132a5f3e701811", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling schemars v0.7.2
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling serde_derive_internals v0.25.0
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling schemars_derive v0.7.2
[INFO] [stderr]     Checking serde_json v1.0.52
[INFO] [stderr]  Documenting jsonschema-to-dhall v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `jsonschema-to-dhall`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name jsonschema_to_dhall src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=58214a70a1a9df10 -L dependency=/opt/rustwide/target/debug/deps --extern schemars=/opt/rustwide/target/debug/deps/libschemars-6cd70176c1190dff.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7f1e3a7e38c020e3.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-02dbc7c13cc129e4.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "81af867878699d2c418b44712abb9af75dd8d00acc423b5f34132a5f3e701811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81af867878699d2c418b44712abb9af75dd8d00acc423b5f34132a5f3e701811", kill_on_drop: false }`
[INFO] [stdout] 81af867878699d2c418b44712abb9af75dd8d00acc423b5f34132a5f3e701811