Dec 06 09:38:04.500 INFO testing SpamapS/rubble against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 09:38:04.500 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 06 09:38:04.668 INFO [stdout] c2ea5bf81f491ee2dfa53b988dc52e5d67d750bb7a9036bb17d65fe85be0eb37
Dec 06 09:38:04.676 INFO running `"docker" "start" "-a" "c2ea5bf81f491ee2dfa53b988dc52e5d67d750bb7a9036bb17d65fe85be0eb37"`
Dec 06 09:38:05.248 INFO [stderr] usermod: no changes
Dec 06 09:38:05.444 INFO [stderr]    Compiling syscall v0.2.1
Dec 06 09:38:05.456 INFO [stderr]    Compiling isatty v0.1.3
Dec 06 09:38:05.457 INFO [stderr]    Compiling nix v0.8.0
Dec 06 09:38:05.457 INFO [stderr]    Compiling thread_local v0.3.3
Dec 06 09:38:05.459 INFO [stderr]    Compiling error-chain v0.8.1
Dec 06 09:38:06.704 INFO [stderr]    Compiling regex v0.2.1
Dec 06 09:38:07.976 INFO [stderr]    Compiling caps v0.0.1
Dec 06 09:38:12.560 INFO [stderr]    Compiling env_logger v0.4.2
Dec 06 09:38:13.560 INFO [stderr]    Compiling rubble v0.1.0 (/source)
Dec 06 09:38:14.633 INFO [stderr] warning: unused import: `CLONE_NEWIPC`
Dec 06 09:38:14.633 INFO [stderr]   --> src/main.rs:24:73
Dec 06 09:38:14.633 INFO [stderr]    |
Dec 06 09:38:14.633 INFO [stderr] 24 |                 CLONE_NEWNS, CLONE_NEWUSER, CLONE_NEWPID, CLONE_NEWNET, CLONE_NEWIPC, CLONE_NEWUTS,
Dec 06 09:38:14.633 INFO [stderr]    |                                                                         ^^^^^^^^^^^^
Dec 06 09:38:14.633 INFO [stderr]    |
Dec 06 09:38:14.633 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 06 09:38:14.633 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `real_gid`
Dec 06 09:38:14.717 INFO [stderr]   --> src/main.rs:54:35
Dec 06 09:38:14.717 INFO [stderr]    |
Dec 06 09:38:14.717 INFO [stderr] 54 | fn acquire_privs(real_uid: uid_t, real_gid: uid_t) -> bool {
Dec 06 09:38:14.717 INFO [stderr]    |                                   ^^^^^^^^ help: consider using `_real_gid` instead
Dec 06 09:38:14.717 INFO [stderr]    |
Dec 06 09:38:14.717 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `overflow_uid`
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:341:10
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 06 09:38:14.717 INFO [stderr]     |          ^^^^^^^^^^^^ help: consider using `_overflow_uid` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `overflow_gid`
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:341:24
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 06 09:38:14.717 INFO [stderr]     |                        ^^^^^^^^^^^^ help: consider using `_overflow_gid` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: variable `host_tty_dev` is assigned to, but never used
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:343:13
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 343 |     let mut host_tty_dev: Option<String> = None;
Dec 06 09:38:14.717 INFO [stderr]     |             ^^^^^^^^^^^^
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr]     = note: consider using `_host_tty_dev` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: value assigned to `host_tty_dev` is never read
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:345:9
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 345 |         host_tty_dev = Some(unsafe {
Dec 06 09:38:14.717 INFO [stderr]     |         ^^^^^^^^^^^^
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `opt_sandbox_uid`
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:421:9
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 421 |     let opt_sandbox_uid = match popts.sandbox_uid {
Dec 06 09:38:14.717 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_uid` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `opt_sandbox_gid`
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:425:9
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 425 |     let opt_sandbox_gid = match popts.sandbox_gid {
Dec 06 09:38:14.717 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_gid` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `proc_wd`
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:447:9
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 447 |     let proc_wd = WalkDir::new("/proc");
Dec 06 09:38:14.717 INFO [stderr]     |         ^^^^^^^ help: consider using `_proc_wd` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: variable `event_fd` is assigned to, but never used
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:467:13
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 467 |     let mut event_fd: Option<i32> = None;
Dec 06 09:38:14.717 INFO [stderr]     |             ^^^^^^^^
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr]     = note: consider using `_event_fd` instead
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: value assigned to `event_fd` is never read
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:469:9
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.717 INFO [stderr] 469 |         event_fd = match eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK) {
Dec 06 09:38:14.717 INFO [stderr]     |         ^^^^^^^^
Dec 06 09:38:14.717 INFO [stderr] 
Dec 06 09:38:14.717 INFO [stderr] warning: unused variable: `e`
Dec 06 09:38:14.717 INFO [stderr]    --> src/main.rs:497:17
Dec 06 09:38:14.717 INFO [stderr]     |
Dec 06 09:38:14.718 INFO [stderr] 497 |             Err(e) => panic!("stat on /proc/self/ns/cgroup failed"),
Dec 06 09:38:14.718 INFO [stderr]     |                 ^ help: consider using `_e` instead
Dec 06 09:38:14.718 INFO [stderr] 
Dec 06 09:38:14.718 INFO [stderr] warning: unused variable: `child_wait_fd`
Dec 06 09:38:14.718 INFO [stderr]    --> src/main.rs:509:9
Dec 06 09:38:14.718 INFO [stderr]     |
Dec 06 09:38:14.718 INFO [stderr] 509 |     let child_wait_fd = match eventfd(0, EFD_CLOEXEC) {
Dec 06 09:38:14.718 INFO [stderr]     |         ^^^^^^^^^^^^^ help: consider using `_child_wait_fd` instead
Dec 06 09:38:14.718 INFO [stderr] 
Dec 06 09:38:14.755 INFO [stderr] error: attempt to subtract with overflow
Dec 06 09:38:14.755 INFO [stderr]   --> src/main.rs:86:38
Dec 06 09:38:14.755 INFO [stderr]    |
Dec 06 09:38:14.755 INFO [stderr] 86 |             let new_fsuid = setfsuid(0 - 1 as u32);
Dec 06 09:38:14.755 INFO [stderr]    |                                      ^^^^^^^^^^^^
Dec 06 09:38:14.755 INFO [stderr]    |
Dec 06 09:38:14.755 INFO [stderr]    = note: #[deny(const_err)] on by default
Dec 06 09:38:14.755 INFO [stderr] 
Dec 06 09:38:14.833 INFO [stderr] error: aborting due to previous error
Dec 06 09:38:14.834 INFO [stderr] 
Dec 06 09:38:14.845 INFO [stderr] error: Could not compile `rubble`.
Dec 06 09:38:14.845 INFO [stderr] 
Dec 06 09:38:14.845 INFO [stderr] To learn more, run the command again with --verbose.
Dec 06 09:38:14.847 INFO [stderr] su: No module specific data is present
Dec 06 09:38:15.210 INFO running `"docker" "inspect" "c2ea5bf81f491ee2dfa53b988dc52e5d67d750bb7a9036bb17d65fe85be0eb37"`
Dec 06 09:38:15.283 INFO running `"docker" "rm" "-f" "c2ea5bf81f491ee2dfa53b988dc52e5d67d750bb7a9036bb17d65fe85be0eb37"`
Dec 06 09:38:15.368 INFO [stdout] c2ea5bf81f491ee2dfa53b988dc52e5d67d750bb7a9036bb17d65fe85be0eb37