[INFO] crate industrial-io 0.1.0 is already in cache
[INFO] extracting crate industrial-io 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/industrial-io/0.1.0
[INFO] extracting crate industrial-io 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/industrial-io/0.1.0
[INFO] validating manifest of industrial-io-0.1.0 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 industrial-io-0.1.0 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 industrial-io-0.1.0
[INFO] finished frobbing industrial-io-0.1.0
[INFO] frobbed toml for industrial-io-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/industrial-io/0.1.0/Cargo.toml
[INFO] started frobbing industrial-io-0.1.0
[INFO] finished frobbing industrial-io-0.1.0
[INFO] frobbed toml for industrial-io-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/industrial-io/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 industrial-io-0.1.0 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/industrial-io/0.1.0:/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] 37b9519f2d6b1228aa063d0abf7f0ca2286bd114d89db595bdb99291f77ebb74
[INFO] running `"docker" "start" "-a" "37b9519f2d6b1228aa063d0abf7f0ca2286bd114d89db595bdb99291f77ebb74"`
[INFO] [stderr]    Compiling libiio-sys v0.1.0
[INFO] [stderr]    Compiling industrial-io v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `errors::*`
[INFO] [stderr]   --> src/context.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | use errors::*;
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `device::*`
[INFO] [stderr]   --> src/context.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use device::*;
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `CStr`
[INFO] [stderr]   --> src/device.rs:13:25
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::ffi::{CString, CStr};
[INFO] [stderr]    |                         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `errors::*`
[INFO] [stderr]   --> src/device.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | use errors::*;
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `channel::*`
[INFO] [stderr]   --> src/device.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | use channel::*;
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `CStr`
[INFO] [stderr]   --> src/channel.rs:13:25
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::ffi::{CString, CStr};
[INFO] [stderr]    |                         ^^^^
[INFO] [stderr] 
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.iio_info_rs.4fv9xyxr-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894" "/opt/crater/target/debug/deps/iio_info_rs-1106c4cfab8d3894.44hkfma4k2el7aql.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/target/debug/build/backtrace-sys-d5ae900bfde9750d/out" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libindustrial_io-4b8b4069dfc874cc.rlib" "/opt/crater/target/debug/deps/liblibiio_sys-75c951c63eb1636b.rlib" "/opt/crater/target/debug/deps/liberror_chain-73fd2519d03dd285.rlib" "/opt/crater/target/debug/deps/libbacktrace-0ba24489b33d7a88.rlib" "/opt/crater/target/debug/deps/libbacktrace_sys-4ba3fb5c8a305755.rlib" "/opt/crater/target/debug/deps/librustc_demangle-93c44a61a479f45e.rlib" "/opt/crater/target/debug/deps/libnix-b517238e3ea127f8.rlib" "/opt/crater/target/debug/deps/liblibc-37f3d1c853b3b7bd.rlib" "/opt/crater/target/debug/deps/libvoid-ee701c9bdcbc84a6.rlib" "/opt/crater/target/debug/deps/libcfg_if-c978b2f886ff1de7.rlib" "/opt/crater/target/debug/deps/libbitflags-c2b055ef483e7b37.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-1d6d86bd078a28e9.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e9721e46a424e2a9.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-c07193698f282147.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-6da45690f3863086.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-690797036dd27680.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-d3896ccbfd8eda2b.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-7cccc3739e3d7623.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-5e9ba178a513cd29.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-5ca9f83bf63d1f4b.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-bba1c7ef9e950882.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-e23c9de62012deb5.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-9b59dffdcd513d5d.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-17392340ab2e4a97.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ac21508a81e3f7f3.rlib" "-Wl,-Bdynamic" "-liio" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -liio
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `industrial-io`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "37b9519f2d6b1228aa063d0abf7f0ca2286bd114d89db595bdb99291f77ebb74"`
[INFO] running `"docker" "rm" "-f" "37b9519f2d6b1228aa063d0abf7f0ca2286bd114d89db595bdb99291f77ebb74"`
[INFO] [stdout] 37b9519f2d6b1228aa063d0abf7f0ca2286bd114d89db595bdb99291f77ebb74