[INFO] crate chalk-engine 0.8.1 is already in cache
[INFO] extracting crate chalk-engine 0.8.1 into work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/chalk-engine/0.8.1
[INFO] extracting crate chalk-engine 0.8.1 into work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/chalk-engine/0.8.1
[INFO] validating manifest of chalk-engine-0.8.1 on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chalk-engine-0.8.1 on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chalk-engine-0.8.1
[INFO] finished frobbing chalk-engine-0.8.1
[INFO] frobbed toml for chalk-engine-0.8.1 written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/chalk-engine/0.8.1/Cargo.toml
[INFO] started frobbing chalk-engine-0.8.1
[INFO] finished frobbing chalk-engine-0.8.1
[INFO] frobbed toml for chalk-engine-0.8.1 written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/chalk-engine/0.8.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking chalk-engine-0.8.1 against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-3/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/chalk-engine/0.8.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2e78aef2b7eff368260cf8d8af812bbe043fce57f10cf0095282bbefe843a8cf
[INFO] running `"docker" "start" "-a" "2e78aef2b7eff368260cf8d8af812bbe043fce57f10cf0095282bbefe843a8cf"`
[INFO] [stderr]    Compiling stacker v0.1.5
[INFO] [stderr]     Checking chalk-macros v0.1.0
[INFO] [stderr]     Checking chalk-engine v0.8.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/stack.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / /// The StackIndex identifies the position of a table's goal in the
[INFO] [stderr] 12 | | /// stack of goals that are actively being processed. Note that once a
[INFO] [stderr] 13 | | /// table is completely evaluated, it may be popped from the stack,
[INFO] [stderr] 14 | | /// and hence no longer have a stack index.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 15 | / index_struct! {
[INFO] [stderr] 16 | |     pub(crate) struct StackIndex {
[INFO] [stderr] 17 | |         value: usize,
[INFO] [stderr] 18 | |     }
[INFO] [stderr] 19 | | }
[INFO] [stderr]    | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:87:1
[INFO] [stderr]    |
[INFO] [stderr] 87 | / /// The StackIndex identifies the position of a table's goal in the
[INFO] [stderr] 88 | | /// stack of goals that are actively being processed. Note that once a
[INFO] [stderr] 89 | | /// table is completely evaluated, it may be popped from the stack,
[INFO] [stderr] 90 | | /// and hence no longer have a stack index.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 91 | / index_struct! {
[INFO] [stderr] 92 | |     struct StackIndex {
[INFO] [stderr] 93 | |         value: usize,
[INFO] [stderr] 94 | |     }
[INFO] [stderr] 95 | | }
[INFO] [stderr]    | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/stack.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / /// The StackIndex identifies the position of a table's goal in the
[INFO] [stderr] 12 | | /// stack of goals that are actively being processed. Note that once a
[INFO] [stderr] 13 | | /// table is completely evaluated, it may be popped from the stack,
[INFO] [stderr] 14 | | /// and hence no longer have a stack index.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 15 | / index_struct! {
[INFO] [stderr] 16 | |     pub(crate) struct StackIndex {
[INFO] [stderr] 17 | |         value: usize,
[INFO] [stderr] 18 | |     }
[INFO] [stderr] 19 | | }
[INFO] [stderr]    | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:87:1
[INFO] [stderr]    |
[INFO] [stderr] 87 | / /// The StackIndex identifies the position of a table's goal in the
[INFO] [stderr] 88 | | /// stack of goals that are actively being processed. Note that once a
[INFO] [stderr] 89 | | /// table is completely evaluated, it may be popped from the stack,
[INFO] [stderr] 90 | | /// and hence no longer have a stack index.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 91 | / index_struct! {
[INFO] [stderr] 92 | |     struct StackIndex {
[INFO] [stderr] 93 | |         value: usize,
[INFO] [stderr] 94 | |     }
[INFO] [stderr] 95 | | }
[INFO] [stderr]    | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `non_modrs_mods` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 | #![feature(non_modrs_mods)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `non_modrs_mods` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 | #![feature(non_modrs_mods)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.77s
[INFO] running `"docker" "inspect" "2e78aef2b7eff368260cf8d8af812bbe043fce57f10cf0095282bbefe843a8cf"`
[INFO] running `"docker" "rm" "-f" "2e78aef2b7eff368260cf8d8af812bbe043fce57f10cf0095282bbefe843a8cf"`
[INFO] [stdout] 2e78aef2b7eff368260cf8d8af812bbe043fce57f10cf0095282bbefe843a8cf