[INFO] updating cached repository TrueDoughnut/ProjectEuler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TrueDoughnut/ProjectEuler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TrueDoughnut/ProjectEuler" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/TrueDoughnut/ProjectEuler"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/TrueDoughnut/ProjectEuler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TrueDoughnut/ProjectEuler" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/TrueDoughnut/ProjectEuler"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/TrueDoughnut/ProjectEuler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c8152c9f02c8a7494a10c82b0c067668de42c4dc
[INFO] sha for GitHub repo TrueDoughnut/ProjectEuler: c8152c9f02c8a7494a10c82b0c067668de42c4dc
[INFO] validating manifest of TrueDoughnut/ProjectEuler on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of TrueDoughnut/ProjectEuler on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing TrueDoughnut/ProjectEuler
[INFO] finished frobbing TrueDoughnut/ProjectEuler
[INFO] frobbed toml for TrueDoughnut/ProjectEuler written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/TrueDoughnut/ProjectEuler/Cargo.toml
[INFO] started frobbing TrueDoughnut/ProjectEuler
[INFO] finished frobbing TrueDoughnut/ProjectEuler
[INFO] frobbed toml for TrueDoughnut/ProjectEuler written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/TrueDoughnut/ProjectEuler/Cargo.toml
[INFO] crate TrueDoughnut/ProjectEuler already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking TrueDoughnut/ProjectEuler against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/TrueDoughnut/ProjectEuler:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7c7c666db0e49b194eaae1a7882e41e5fac24f72674800a55a0be9e413667af9
[INFO] running `"docker" "start" "-a" "7c7c666db0e49b194eaae1a7882e41e5fac24f72674800a55a0be9e413667af9"`
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]     Checking ProjectEuler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/harder_problems/mod.rs:20:40
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn positive_integers(n: BigInt) -> Vec<&BigInt> {
[INFO] [stderr]    |                                        ^ help: consider giving it an explicit bounded or 'static lifetime: `&'static`
[INFO] [stderr]    |
[INFO] [stderr]    = help: this function's return type contains a borrowed value with an elided lifetime, but the lifetime cannot be derived from the arguments
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0106`.
[INFO] [stderr] error: Could not compile `ProjectEuler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/harder_problems/mod.rs:20:40
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn positive_integers(n: BigInt) -> Vec<&BigInt> {
[INFO] [stderr]    |                                        ^ help: consider giving it an explicit bounded or 'static lifetime: `&'static`
[INFO] [stderr]    |
[INFO] [stderr]    = help: this function's return type contains a borrowed value with an elided lifetime, but the lifetime cannot be derived from the arguments
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0106`.
[INFO] [stderr] error: Could not compile `ProjectEuler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7c7c666db0e49b194eaae1a7882e41e5fac24f72674800a55a0be9e413667af9"`
[INFO] running `"docker" "rm" "-f" "7c7c666db0e49b194eaae1a7882e41e5fac24f72674800a55a0be9e413667af9"`
[INFO] [stdout] 7c7c666db0e49b194eaae1a7882e41e5fac24f72674800a55a0be9e413667af9