Dec 14 05:48:05.051 INFO testing SpamapS/rubble against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 05:48:05.051 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 05:48:05.311 INFO [stdout] 7f74f3b49d19a12aff4725904547c74eb13d3c40d2b983733c13f867d9839b64
Dec 14 05:48:05.312 INFO running `"docker" "start" "-a" "7f74f3b49d19a12aff4725904547c74eb13d3c40d2b983733c13f867d9839b64"`
Dec 14 05:48:06.212 INFO [stderr] usermod: no changes
Dec 14 05:48:06.388 INFO [stderr]    Compiling custom_derive v0.1.7
Dec 14 05:48:06.388 INFO [stderr]    Compiling syscall v0.2.1
Dec 14 05:48:06.432 INFO [stderr]    Compiling isatty v0.1.3
Dec 14 05:48:06.432 INFO [stderr]    Compiling nix v0.8.0
Dec 14 05:48:06.433 INFO [stderr]    Compiling thread_local v0.3.3
Dec 14 05:48:06.433 INFO [stderr]    Compiling error-chain v0.8.1
Dec 14 05:48:08.305 INFO [stderr]    Compiling regex v0.2.1
Dec 14 05:48:08.930 INFO [stderr]    Compiling caps v0.0.1
Dec 14 05:48:18.051 INFO [stderr]    Compiling env_logger v0.4.2
Dec 14 05:48:19.171 INFO [stderr]    Compiling rubble v0.1.0 (/source)
Dec 14 05:48:20.291 INFO [stderr] warning: unused import: `CLONE_NEWIPC`
Dec 14 05:48:20.291 INFO [stderr]   --> src/main.rs:24:73
Dec 14 05:48:20.291 INFO [stderr]    |
Dec 14 05:48:20.291 INFO [stderr] 24 |                 CLONE_NEWNS, CLONE_NEWUSER, CLONE_NEWPID, CLONE_NEWNET, CLONE_NEWIPC, CLONE_NEWUTS,
Dec 14 05:48:20.291 INFO [stderr]    |                                                                         ^^^^^^^^^^^^
Dec 14 05:48:20.291 INFO [stderr]    |
Dec 14 05:48:20.291 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 14 05:48:20.291 INFO [stderr] 
Dec 14 05:48:20.420 INFO [stderr] warning: unused variable: `real_gid`
Dec 14 05:48:20.420 INFO [stderr]   --> src/main.rs:54:35
Dec 14 05:48:20.420 INFO [stderr]    |
Dec 14 05:48:20.420 INFO [stderr] 54 | fn acquire_privs(real_uid: uid_t, real_gid: uid_t) -> bool {
Dec 14 05:48:20.420 INFO [stderr]    |                                   ^^^^^^^^ help: consider using `_real_gid` instead
Dec 14 05:48:20.420 INFO [stderr]    |
Dec 14 05:48:20.420 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 05:48:20.420 INFO [stderr] 
Dec 14 05:48:20.420 INFO [stderr] warning: unused variable: `overflow_uid`
Dec 14 05:48:20.420 INFO [stderr]    --> src/main.rs:341:10
Dec 14 05:48:20.420 INFO [stderr]     |
Dec 14 05:48:20.420 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 14 05:48:20.420 INFO [stderr]     |          ^^^^^^^^^^^^ help: consider using `_overflow_uid` instead
Dec 14 05:48:20.420 INFO [stderr] 
Dec 14 05:48:20.420 INFO [stderr] warning: unused variable: `overflow_gid`
Dec 14 05:48:20.420 INFO [stderr]    --> src/main.rs:341:24
Dec 14 05:48:20.420 INFO [stderr]     |
Dec 14 05:48:20.420 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 14 05:48:20.420 INFO [stderr]     |                        ^^^^^^^^^^^^ help: consider using `_overflow_gid` instead
Dec 14 05:48:20.420 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: variable `host_tty_dev` is assigned to, but never used
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:343:13
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 343 |     let mut host_tty_dev: Option<String> = None;
Dec 14 05:48:20.421 INFO [stderr]     |             ^^^^^^^^^^^^
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr]     = note: consider using `_host_tty_dev` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: value assigned to `host_tty_dev` is never read
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:345:9
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 345 |         host_tty_dev = Some(unsafe {
Dec 14 05:48:20.421 INFO [stderr]     |         ^^^^^^^^^^^^
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: unused variable: `opt_sandbox_uid`
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:421:9
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 421 |     let opt_sandbox_uid = match popts.sandbox_uid {
Dec 14 05:48:20.421 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_uid` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: unused variable: `opt_sandbox_gid`
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:425:9
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 425 |     let opt_sandbox_gid = match popts.sandbox_gid {
Dec 14 05:48:20.421 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_gid` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: unused variable: `proc_wd`
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:447:9
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 447 |     let proc_wd = WalkDir::new("/proc");
Dec 14 05:48:20.421 INFO [stderr]     |         ^^^^^^^ help: consider using `_proc_wd` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: variable `event_fd` is assigned to, but never used
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:467:13
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 467 |     let mut event_fd: Option<i32> = None;
Dec 14 05:48:20.421 INFO [stderr]     |             ^^^^^^^^
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr]     = note: consider using `_event_fd` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: value assigned to `event_fd` is never read
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:469:9
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 469 |         event_fd = match eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK) {
Dec 14 05:48:20.421 INFO [stderr]     |         ^^^^^^^^
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: unused variable: `e`
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:497:17
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 497 |             Err(e) => panic!("stat on /proc/self/ns/cgroup failed"),
Dec 14 05:48:20.421 INFO [stderr]     |                 ^ help: consider using `_e` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.421 INFO [stderr] warning: unused variable: `child_wait_fd`
Dec 14 05:48:20.421 INFO [stderr]    --> src/main.rs:509:9
Dec 14 05:48:20.421 INFO [stderr]     |
Dec 14 05:48:20.421 INFO [stderr] 509 |     let child_wait_fd = match eventfd(0, EFD_CLOEXEC) {
Dec 14 05:48:20.421 INFO [stderr]     |         ^^^^^^^^^^^^^ help: consider using `_child_wait_fd` instead
Dec 14 05:48:20.421 INFO [stderr] 
Dec 14 05:48:20.470 INFO [stderr] error: attempt to subtract with overflow
Dec 14 05:48:20.470 INFO [stderr]   --> src/main.rs:86:38
Dec 14 05:48:20.470 INFO [stderr]    |
Dec 14 05:48:20.470 INFO [stderr] 86 |             let new_fsuid = setfsuid(0 - 1 as u32);
Dec 14 05:48:20.470 INFO [stderr]    |                                      ^^^^^^^^^^^^
Dec 14 05:48:20.470 INFO [stderr]    |
Dec 14 05:48:20.470 INFO [stderr]    = note: #[deny(const_err)] on by default
Dec 14 05:48:20.470 INFO [stderr] 
Dec 14 05:48:20.502 INFO [stderr] error: aborting due to previous error
Dec 14 05:48:20.502 INFO [stderr] 
Dec 14 05:48:20.511 INFO [stderr] error: Could not compile `rubble`.
Dec 14 05:48:20.511 INFO [stderr] 
Dec 14 05:48:20.511 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 05:48:20.513 INFO [stderr] su: No module specific data is present
Dec 14 05:48:20.902 INFO running `"docker" "inspect" "7f74f3b49d19a12aff4725904547c74eb13d3c40d2b983733c13f867d9839b64"`
Dec 14 05:48:20.994 INFO running `"docker" "rm" "-f" "7f74f3b49d19a12aff4725904547c74eb13d3c40d2b983733c13f867d9839b64"`
Dec 14 05:48:21.152 INFO [stdout] 7f74f3b49d19a12aff4725904547c74eb13d3c40d2b983733c13f867d9839b64