[INFO] updating cached repository actimehl/c_ffi_test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/actimehl/c_ffi_test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/actimehl/c_ffi_test" "work/ex/beta-1.38-1/sources/1.37.0/gh/actimehl/c_ffi_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/actimehl/c_ffi_test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/actimehl/c_ffi_test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/actimehl/c_ffi_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/actimehl/c_ffi_test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] faf5b69267432a29897b475265256aecf3f4845c
[INFO] sha for GitHub repo actimehl/c_ffi_test: faf5b69267432a29897b475265256aecf3f4845c
[INFO] validating manifest of actimehl/c_ffi_test 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 actimehl/c_ffi_test 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 actimehl/c_ffi_test
[INFO] finished frobbing actimehl/c_ffi_test
[INFO] frobbed toml for actimehl/c_ffi_test written to work/ex/beta-1.38-1/sources/1.37.0/gh/actimehl/c_ffi_test/Cargo.toml
[INFO] started frobbing actimehl/c_ffi_test
[INFO] finished frobbing actimehl/c_ffi_test
[INFO] frobbed toml for actimehl/c_ffi_test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/actimehl/c_ffi_test/Cargo.toml
[INFO] crate actimehl/c_ffi_test 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 actimehl/c_ffi_test against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/actimehl/c_ffi_test:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 9b895015aef1c21adcf12a04b78da1909012e8a1afa9a6fd4726da55be6e0aef
[INFO] running `"docker" "start" "-a" "9b895015aef1c21adcf12a04b78da1909012e8a1afa9a6fd4726da55be6e0aef"`
[INFO] [stderr]    Compiling c_ffi_test v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unstable`
[INFO] [stderr]  --> build.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![allow(unstable)]
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unknown_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> build.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::old_io::Command;
[INFO] [stderr]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Path`
[INFO] [stderr]   --> build.rs:12:29
[INFO] [stderr]    |
[INFO] [stderr] 12 |                       .cwd(&Path::new(&out_dir))
[INFO] [stderr]    |                             ^^^^ use of undeclared type or module `Path`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `getenv` in module `os`
[INFO] [stderr]  --> build.rs:6:23
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let out_dir = os::getenv("OUT_DIR").unwrap();
[INFO] [stderr]   |                       ^^^^^^ not found in `os`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `c_ffi_test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9b895015aef1c21adcf12a04b78da1909012e8a1afa9a6fd4726da55be6e0aef"`
[INFO] running `"docker" "rm" "-f" "9b895015aef1c21adcf12a04b78da1909012e8a1afa9a6fd4726da55be6e0aef"`
[INFO] [stdout] 9b895015aef1c21adcf12a04b78da1909012e8a1afa9a6fd4726da55be6e0aef