[INFO] fetching crate gaol 0.2.1...
[INFO] checking gaol-0.2.1 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate gaol 0.2.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate gaol 0.2.1 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gaol 0.2.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate gaol 0.2.1
[INFO] tweaked toml for crates.io crate gaol 0.2.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate gaol 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71aad5e6d39b66dd6dec0d3267b735afe95bb572b39f3b23d2395ab9d9c67dda
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "71aad5e6d39b66dd6dec0d3267b735afe95bb572b39f3b23d2395ab9d9c67dda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71aad5e6d39b66dd6dec0d3267b735afe95bb572b39f3b23d2395ab9d9c67dda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71aad5e6d39b66dd6dec0d3267b735afe95bb572b39f3b23d2395ab9d9c67dda", kill_on_drop: false }`
[INFO] [stdout] 71aad5e6d39b66dd6dec0d3267b735afe95bb572b39f3b23d2395ab9d9c67dda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3d2eb5677853916ad2fbd260d1b35cc8a5de2c521c9028927671429ea321cc3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e3d2eb5677853916ad2fbd260d1b35cc8a5de2c521c9028927671429ea321cc3", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking libc v0.2.62
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking gaol v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> sandbox.rs:79:25
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Ok(Command::new(try!(env::current_exe())))
[INFO] [stdout]    |                         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `platform::linux::seccomp`
[INFO] [stdout]   --> platform/linux/namespace.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use platform::linux::seccomp;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `c_ulong`
[INFO] [stdout]   --> platform/linux/namespace.rs:19:33
[INFO] [stdout]    |
[INFO] [stdout] 19 | use libc::{self, c_char, c_int, c_ulong, c_void, gid_t, pid_t, size_t, ssize_t, uid_t};
[INFO] [stdout]    |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> platform/linux/namespace.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let jail = try!(ChrootJail::new(profile));
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> platform/linux/namespace.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     try!(jail.enter());
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> platform/linux/namespace.rs:78:21
[INFO] [stdout]    |
[INFO] [stdout] 78 |                     try!(jail.bind_mount(path));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 |     try!(try!(File::create(&Path::new("/proc/self/setgroups"))).write_all(b"deny"));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:196:10
[INFO] [stdout]     |
[INFO] [stdout] 196 |     try!(try!(File::create(&Path::new("/proc/self/setgroups"))).write_all(b"deny"));
[INFO] [stdout]     |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     try!(try!(File::create(&Path::new("/proc/self/gid_map"))).write_all(gid_contents.as_bytes()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:199:10
[INFO] [stdout]     |
[INFO] [stdout] 199 |     try!(try!(File::create(&Path::new("/proc/self/gid_map"))).write_all(gid_contents.as_bytes()));
[INFO] [stdout]     |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:201:5
[INFO] [stdout]     |
[INFO] [stdout] 201 |     try!(try!(File::create(&Path::new("/proc/self/uid_map"))).write_all(uid_contents.as_bytes()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:201:10
[INFO] [stdout]     |
[INFO] [stdout] 201 |     try!(try!(File::create(&Path::new("/proc/self/uid_map"))).write_all(uid_contents.as_bytes()));
[INFO] [stdout]     |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stdout] warning: constant is never used: `EM_386`
[INFO] [stdout]   --> platform/linux/seccomp.rs:73:1
[INFO] [stdout]    |
[INFO] [stdout] 73 | const EM_386: u32 = 3;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_PPC`
[INFO] [stdout]   --> platform/linux/seccomp.rs:74:1
[INFO] [stdout]    |
[INFO] [stdout] 74 | const EM_PPC: u32 = 20;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_PPC64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:75:1
[INFO] [stdout]    |
[INFO] [stdout] 75 | const EM_PPC64: u32 = 21;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_ARM`
[INFO] [stdout]   --> platform/linux/seccomp.rs:76:1
[INFO] [stdout]    |
[INFO] [stdout] 76 | const EM_ARM: u32 = 40;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_AARCH64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:78:1
[INFO] [stdout]    |
[INFO] [stdout] 78 | const EM_AARCH64: u32 = 183;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_X86`
[INFO] [stdout]   --> platform/linux/seccomp.rs:85:1
[INFO] [stdout]    |
[INFO] [stdout] 85 | const AUDIT_ARCH_X86: u32 = EM_386 | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_ARM`
[INFO] [stdout]   --> platform/linux/seccomp.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | const AUDIT_ARCH_ARM: u32 = EM_ARM | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_AARCH64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | const AUDIT_ARCH_AARCH64: u32 = EM_AARCH64 | __AUDIT_ARCH_64BIT | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_PPC`
[INFO] [stdout]   --> platform/linux/seccomp.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | const AUDIT_ARCH_PPC: u32 = EM_PPC;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_PPC64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:95:1
[INFO] [stdout]    |
[INFO] [stdout] 95 | const AUDIT_ARCH_PPC64: u32 = EM_PPC64 | __AUDIT_ARCH_64BIT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_PPC64LE`
[INFO] [stdout]   --> platform/linux/seccomp.rs:97:1
[INFO] [stdout]    |
[INFO] [stdout] 97 | const AUDIT_ARCH_PPC64LE: u32 = EM_PPC64 | __AUDIT_ARCH_64BIT | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stdout] warning: unused imports: `ChildSandboxMethods`, `ChildSandbox`, `Command`, `SandboxMethods`, `Sandbox`
[INFO] [stdout]  --> tests/system-info-read.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | use gaol::sandbox::{ChildSandbox, ChildSandboxMethods, Command, Sandbox, SandboxMethods};
[INFO] [stdout]   |                     ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `c_char`, `c_int`, `c_void`, `size_t`
[INFO] [stdout]  --> tests/system-info-read.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | use libc::{c_char, c_int, c_void, size_t};
[INFO] [stdout]   |            ^^^^^^  ^^^^^  ^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]   --> tests/system-info-read.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::env;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ffi::CString`
[INFO] [stdout]   --> tests/system-info-read.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::ffi::CString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter`
[INFO] [stdout]   --> tests/system-info-read.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::iter;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]   --> tests/system-info-read.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::ptr;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> sandbox.rs:79:25
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Ok(Command::new(try!(env::current_exe())))
[INFO] [stdout]    |                         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `platform::linux::seccomp`
[INFO] [stdout]   --> platform/linux/namespace.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use platform::linux::seccomp;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `c_ulong`
[INFO] [stdout]   --> platform/linux/namespace.rs:19:33
[INFO] [stdout]    |
[INFO] [stdout] 19 | use libc::{self, c_char, c_int, c_ulong, c_void, gid_t, pid_t, size_t, ssize_t, uid_t};
[INFO] [stdout]    |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> platform/linux/namespace.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let jail = try!(ChrootJail::new(profile));
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> platform/linux/namespace.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     try!(jail.enter());
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> platform/linux/namespace.rs:78:21
[INFO] [stdout]    |
[INFO] [stdout] 78 |                     try!(jail.bind_mount(path));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 |     try!(try!(File::create(&Path::new("/proc/self/setgroups"))).write_all(b"deny"));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:196:10
[INFO] [stdout]     |
[INFO] [stdout] 196 |     try!(try!(File::create(&Path::new("/proc/self/setgroups"))).write_all(b"deny"));
[INFO] [stdout]     |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     try!(try!(File::create(&Path::new("/proc/self/gid_map"))).write_all(gid_contents.as_bytes()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:199:10
[INFO] [stdout]     |
[INFO] [stdout] 199 |     try!(try!(File::create(&Path::new("/proc/self/gid_map"))).write_all(gid_contents.as_bytes()));
[INFO] [stdout]     |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:201:5
[INFO] [stdout]     |
[INFO] [stdout] 201 |     try!(try!(File::create(&Path::new("/proc/self/uid_map"))).write_all(uid_contents.as_bytes()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> platform/linux/namespace.rs:201:10
[INFO] [stdout]     |
[INFO] [stdout] 201 |     try!(try!(File::create(&Path::new("/proc/self/uid_map"))).write_all(uid_contents.as_bytes()));
[INFO] [stdout]     |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `SYSCTL_NAME`
[INFO] [stdout]   --> tests/system-info-read.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | static SYSCTL_NAME: &'static str = "hw.ncpu";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `allowance_profile`
[INFO] [stdout]   --> tests/system-info-read.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn allowance_profile() -> Profile {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `prohibition_profile`
[INFO] [stdout]   --> tests/system-info-read.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn prohibition_profile() -> Profile {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_386`
[INFO] [stdout]   --> platform/linux/seccomp.rs:73:1
[INFO] [stdout]    |
[INFO] [stdout] 73 | const EM_386: u32 = 3;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_PPC`
[INFO] [stdout]   --> platform/linux/seccomp.rs:74:1
[INFO] [stdout]    |
[INFO] [stdout] 74 | const EM_PPC: u32 = 20;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_PPC64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:75:1
[INFO] [stdout]    |
[INFO] [stdout] 75 | const EM_PPC64: u32 = 21;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_ARM`
[INFO] [stdout]   --> platform/linux/seccomp.rs:76:1
[INFO] [stdout]    |
[INFO] [stdout] 76 | const EM_ARM: u32 = 40;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EM_AARCH64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:78:1
[INFO] [stdout]    |
[INFO] [stdout] 78 | const EM_AARCH64: u32 = 183;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_X86`
[INFO] [stdout]   --> platform/linux/seccomp.rs:85:1
[INFO] [stdout]    |
[INFO] [stdout] 85 | const AUDIT_ARCH_X86: u32 = EM_386 | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_ARM`
[INFO] [stdout]   --> platform/linux/seccomp.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | const AUDIT_ARCH_ARM: u32 = EM_ARM | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_AARCH64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | const AUDIT_ARCH_AARCH64: u32 = EM_AARCH64 | __AUDIT_ARCH_64BIT | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_PPC`
[INFO] [stdout]   --> platform/linux/seccomp.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | const AUDIT_ARCH_PPC: u32 = EM_PPC;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_PPC64`
[INFO] [stdout]   --> platform/linux/seccomp.rs:95:1
[INFO] [stdout]    |
[INFO] [stdout] 95 | const AUDIT_ARCH_PPC64: u32 = EM_PPC64 | __AUDIT_ARCH_64BIT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `AUDIT_ARCH_PPC64LE`
[INFO] [stdout]   --> platform/linux/seccomp.rs:97:1
[INFO] [stdout]    |
[INFO] [stdout] 97 | const AUDIT_ARCH_PPC64LE: u32 = EM_PPC64 | __AUDIT_ARCH_64BIT | __AUDIT_ARCH_LE;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.30s
[INFO] running `Command { std: "docker" "inspect" "e3d2eb5677853916ad2fbd260d1b35cc8a5de2c521c9028927671429ea321cc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3d2eb5677853916ad2fbd260d1b35cc8a5de2c521c9028927671429ea321cc3", kill_on_drop: false }`
[INFO] [stdout] e3d2eb5677853916ad2fbd260d1b35cc8a5de2c521c9028927671429ea321cc3