[INFO] updating cached repository jasonlai/nsexec
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jasonlai/nsexec
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jasonlai/nsexec" "work/ex/beta-1.38-1/sources/1.37.0/gh/jasonlai/nsexec"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jasonlai/nsexec'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jasonlai/nsexec" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jasonlai/nsexec"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jasonlai/nsexec'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6f90b8d7027f91862eb22ed3486a381e9b2d242b
[INFO] sha for GitHub repo jasonlai/nsexec: 6f90b8d7027f91862eb22ed3486a381e9b2d242b
[INFO] validating manifest of jasonlai/nsexec 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 jasonlai/nsexec 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 jasonlai/nsexec
[INFO] finished frobbing jasonlai/nsexec
[INFO] frobbed toml for jasonlai/nsexec written to work/ex/beta-1.38-1/sources/1.37.0/gh/jasonlai/nsexec/Cargo.toml
[INFO] started frobbing jasonlai/nsexec
[INFO] finished frobbing jasonlai/nsexec
[INFO] frobbed toml for jasonlai/nsexec written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jasonlai/nsexec/Cargo.toml
[INFO] crate jasonlai/nsexec 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jasonlai/nsexec/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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] [stderr]     Blocking waiting for file lock on package cache
[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 jasonlai/nsexec 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/jasonlai/nsexec:/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] 983ffbd3fcf3881f0a45c24c76dc1abb18f3306760506fc06776641250e6a7e2
[INFO] running `"docker" "start" "-a" "983ffbd3fcf3881f0a45c24c76dc1abb18f3306760506fc06776641250e6a7e2"`
[INFO] [stderr]    Compiling nsexec v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/nsexec.rs:41:55
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn from_arguments(args: Vec<String>, stdout: &mut Write, stderr: &mut Write) -> Result<T, i32>;
[INFO] [stderr]    |                                                       ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/nsexec.rs:41:75
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn from_arguments(args: Vec<String>, stdout: &mut Write, stderr: &mut Write) -> Result<T, i32>;
[INFO] [stderr]    |                                                                           ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/nsexec.rs:73:55
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn from_arguments(args: Vec<String>, stdout: &mut Write, stderr: &mut Write) -> Result<NSExecutor, i32> {
[INFO] [stderr]    |                                                       ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/nsexec.rs:73:75
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn from_arguments(args: Vec<String>, stdout: &mut Write, stderr: &mut Write) -> Result<NSExecutor, i32> {
[INFO] [stderr]    |                                                                           ^^^^^ help: use `dyn`: `dyn Write`
[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/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.nsexec.5xyb3jee-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23" "/opt/crater/target/debug/deps/nsexec-37364f9e63a35f23.18wh7u8drhnpolbh.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lmount" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/liblibc-37f3d1c853b3b7bd.rlib" "/opt/crater/target/debug/deps/libargparse-7704e027f8e13e22.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" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lmount
[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 `nsexec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "983ffbd3fcf3881f0a45c24c76dc1abb18f3306760506fc06776641250e6a7e2"`
[INFO] running `"docker" "rm" "-f" "983ffbd3fcf3881f0a45c24c76dc1abb18f3306760506fc06776641250e6a7e2"`
[INFO] [stdout] 983ffbd3fcf3881f0a45c24c76dc1abb18f3306760506fc06776641250e6a7e2