[INFO] updating cached repository ianfabs/gig
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ianfabs/gig
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ianfabs/gig" "work/ex/beta-1.38-1/sources/1.37.0/gh/ianfabs/gig"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ianfabs/gig'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ianfabs/gig" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ianfabs/gig"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ianfabs/gig'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 848e185ade5691fc25b02906ad9646d37ecb964e
[INFO] sha for GitHub repo ianfabs/gig: 848e185ade5691fc25b02906ad9646d37ecb964e
[INFO] validating manifest of ianfabs/gig on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ianfabs/gig on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ianfabs/gig
[INFO] finished frobbing ianfabs/gig
[INFO] frobbed toml for ianfabs/gig written to work/ex/beta-1.38-1/sources/1.37.0/gh/ianfabs/gig/Cargo.toml
[INFO] started frobbing ianfabs/gig
[INFO] finished frobbing ianfabs/gig
[INFO] frobbed toml for ianfabs/gig written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ianfabs/gig/Cargo.toml
[INFO] crate ianfabs/gig already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ianfabs/gig against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ianfabs/gig:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 815d8c9525c0e96f60bfb1aacf556dfcb84b06e57e5c850685801d2312ec9b41
[INFO] running `"docker" "start" "-a" "815d8c9525c0e96f60bfb1aacf556dfcb84b06e57e5c850685801d2312ec9b41"`
[INFO] [stderr]    Compiling bitflags v1.0.5
[INFO] [stderr]    Compiling gig v0.2.5-alpha.0 (/opt/crater/workdir)
[INFO] [stderr]    Compiling openssl-sys v0.9.45
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> build.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate cc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> build.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         cc::Build::new()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> build.rs:18:14
[INFO] [stderr]    |
[INFO] [stderr] 18 |             .file("hello.c")
[INFO] [stderr]    |              ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> build.rs:19:14
[INFO] [stderr]    |
[INFO] [stderr] 19 |             .compile("libhello.a");
[INFO] [stderr]    |              ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `gig`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "815d8c9525c0e96f60bfb1aacf556dfcb84b06e57e5c850685801d2312ec9b41"`
[INFO] running `"docker" "rm" "-f" "815d8c9525c0e96f60bfb1aacf556dfcb84b06e57e5c850685801d2312ec9b41"`
[INFO] [stdout] 815d8c9525c0e96f60bfb1aacf556dfcb84b06e57e5c850685801d2312ec9b41