[INFO] updating cached repository rphmeier/shamir_sharing
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rphmeier/shamir_sharing
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rphmeier/shamir_sharing" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rphmeier/shamir_sharing"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rphmeier/shamir_sharing'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rphmeier/shamir_sharing" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rphmeier/shamir_sharing"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rphmeier/shamir_sharing'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5714c399123ef015c225df1a978b36326addc937
[INFO] sha for GitHub repo rphmeier/shamir_sharing: 5714c399123ef015c225df1a978b36326addc937
[INFO] validating manifest of rphmeier/shamir_sharing 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 rphmeier/shamir_sharing 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 rphmeier/shamir_sharing
[INFO] finished frobbing rphmeier/shamir_sharing
[INFO] frobbed toml for rphmeier/shamir_sharing written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rphmeier/shamir_sharing/Cargo.toml
[INFO] started frobbing rphmeier/shamir_sharing
[INFO] finished frobbing rphmeier/shamir_sharing
[INFO] frobbed toml for rphmeier/shamir_sharing written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rphmeier/shamir_sharing/Cargo.toml
[INFO] crate rphmeier/shamir_sharing already has a lockfile, it will not be regenerated
[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 rphmeier/shamir_sharing against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rphmeier/shamir_sharing:/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] a4030527c210660d9740fdec97333d4796557807aa8616b7a7e0c88571e159aa
[INFO] running `"docker" "start" "-a" "a4030527c210660d9740fdec97333d4796557807aa8616b7a7e0c88571e159aa"`
[INFO] [stderr]     Checking serde v1.0.21
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]    Compiling serde_derive_internals v0.17.0
[INFO] [stderr]     Checking textwrap v0.8.0
[INFO] [stderr]     Checking clap v2.26.2
[INFO] [stderr]     Checking num-rational v0.1.40
[INFO] [stderr]    Compiling serde_derive v1.0.21
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking serde_json v1.0.6
[INFO] [stderr]     Checking shamir-sharing v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/field.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / /// This module exports two items: a large prime number `PRIME` and the `Value` type, which are members of
[INFO] [stderr] 8  | | /// the finite field Z / PRIME*Z
[INFO] [stderr]    | |________________________________^
[INFO] [stderr] ...
[INFO] [stderr] 12 | / thread_local! {
[INFO] [stderr] 13 | |     pub static PRIME: BigInt = {
[INFO] [stderr] 14 | |         let mut x = BigInt::one() << 256;
[INFO] [stderr] 15 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 25 | |     };
[INFO] [stderr] 26 | | }
[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/field.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / /// This module exports two items: a large prime number `PRIME` and the `Value` type, which are members of
[INFO] [stderr] 8  | | /// the finite field Z / PRIME*Z
[INFO] [stderr]    | |________________________________^
[INFO] [stderr] ...
[INFO] [stderr] 12 | / thread_local! {
[INFO] [stderr] 13 | |     pub static PRIME: BigInt = {
[INFO] [stderr] 14 | |         let mut x = BigInt::one() << 256;
[INFO] [stderr] 15 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 25 | |     };
[INFO] [stderr] 26 | | }
[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]     Finished dev [unoptimized + debuginfo] target(s) in 24.12s
[INFO] running `"docker" "inspect" "a4030527c210660d9740fdec97333d4796557807aa8616b7a7e0c88571e159aa"`
[INFO] running `"docker" "rm" "-f" "a4030527c210660d9740fdec97333d4796557807aa8616b7a7e0c88571e159aa"`
[INFO] [stdout] a4030527c210660d9740fdec97333d4796557807aa8616b7a7e0c88571e159aa