Dec 19 21:51:21.375 INFO checking SpamapS/rubble against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 21:51:21.375 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/SpamapS/rubble:/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=forbid" "-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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:51:21.804 INFO [stdout] 4c9a010af8c6e50ba626b807d3e4dcbae9b78f45225f0ccdbb6268f5c84f730d
Dec 19 21:51:21.810 INFO running `"docker" "start" "-a" "4c9a010af8c6e50ba626b807d3e4dcbae9b78f45225f0ccdbb6268f5c84f730d"`
Dec 19 21:51:22.408 INFO [stderr]     Checking enum_derive v0.1.7
Dec 19 21:51:22.408 INFO [stderr]     Checking syscall v0.2.1
Dec 19 21:51:22.408 INFO [stderr]     Checking isatty v0.1.3
Dec 19 21:51:22.408 INFO [stderr]     Checking nix v0.8.0
Dec 19 21:51:22.416 INFO [stderr]     Checking thread_local v0.3.3
Dec 19 21:51:22.416 INFO [stderr]     Checking backtrace v0.3.0
Dec 19 21:51:23.321 INFO [stderr]     Checking regex v0.2.1
Dec 19 21:51:23.636 INFO [stderr]     Checking error-chain v0.8.1
Dec 19 21:51:24.513 INFO [stderr]     Checking caps v0.0.1
Dec 19 21:51:26.177 INFO [stderr]     Checking env_logger v0.4.2
Dec 19 21:51:27.217 INFO [stderr]     Checking rubble v0.1.0 (/opt/crater/workdir)
Dec 19 21:51:27.729 INFO [stderr] warning: unused import: `CLONE_NEWIPC`
Dec 19 21:51:27.729 INFO [stderr]   --> src/main.rs:24:73
Dec 19 21:51:27.729 INFO [stderr]    |
Dec 19 21:51:27.729 INFO [stderr] 24 |                 CLONE_NEWNS, CLONE_NEWUSER, CLONE_NEWPID, CLONE_NEWNET, CLONE_NEWIPC, CLONE_NEWUTS,
Dec 19 21:51:27.729 INFO [stderr]    |                                                                         ^^^^^^^^^^^^
Dec 19 21:51:27.729 INFO [stderr]    |
Dec 19 21:51:27.729 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 21:51:27.729 INFO [stderr] 
Dec 19 21:51:27.820 INFO [stderr] warning: unused import: `CLONE_NEWIPC`
Dec 19 21:51:27.820 INFO [stderr]   --> src/main.rs:24:73
Dec 19 21:51:27.820 INFO [stderr]    |
Dec 19 21:51:27.820 INFO [stderr] 24 |                 CLONE_NEWNS, CLONE_NEWUSER, CLONE_NEWPID, CLONE_NEWNET, CLONE_NEWIPC, CLONE_NEWUTS,
Dec 19 21:51:27.820 INFO [stderr]    |                                                                         ^^^^^^^^^^^^
Dec 19 21:51:27.820 INFO [stderr]    |
Dec 19 21:51:27.820 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 21:51:27.820 INFO [stderr] 
Dec 19 21:51:27.893 INFO [stderr] warning: unused variable: `real_gid`
Dec 19 21:51:27.893 INFO [stderr]   --> src/main.rs:54:35
Dec 19 21:51:27.893 INFO [stderr]    |
Dec 19 21:51:27.893 INFO [stderr] 54 | fn acquire_privs(real_uid: uid_t, real_gid: uid_t) -> bool {
Dec 19 21:51:27.893 INFO [stderr]    |                                   ^^^^^^^^ help: consider using `_real_gid` instead
Dec 19 21:51:27.893 INFO [stderr]    |
Dec 19 21:51:27.893 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:51:27.893 INFO [stderr] 
Dec 19 21:51:27.893 INFO [stderr] warning: unused variable: `overflow_uid`
Dec 19 21:51:27.893 INFO [stderr]    --> src/main.rs:341:10
Dec 19 21:51:27.893 INFO [stderr]     |
Dec 19 21:51:27.893 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 19 21:51:27.893 INFO [stderr]     |          ^^^^^^^^^^^^ help: consider using `_overflow_uid` instead
Dec 19 21:51:27.893 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: unused variable: `overflow_gid`
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:341:24
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 19 21:51:27.894 INFO [stderr]     |                        ^^^^^^^^^^^^ help: consider using `_overflow_gid` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: variable `host_tty_dev` is assigned to, but never used
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:343:13
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 343 |     let mut host_tty_dev: Option<String> = None;
Dec 19 21:51:27.894 INFO [stderr]     |             ^^^^^^^^^^^^
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr]     = note: consider using `_host_tty_dev` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: value assigned to `host_tty_dev` is never read
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:345:9
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 345 |         host_tty_dev = Some(unsafe {
Dec 19 21:51:27.894 INFO [stderr]     |         ^^^^^^^^^^^^
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 19 21:51:27.894 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: unused variable: `opt_sandbox_uid`
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:421:9
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 421 |     let opt_sandbox_uid = match popts.sandbox_uid {
Dec 19 21:51:27.894 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_uid` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: unused variable: `opt_sandbox_gid`
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:425:9
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 425 |     let opt_sandbox_gid = match popts.sandbox_gid {
Dec 19 21:51:27.894 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_gid` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: unused variable: `proc_wd`
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:447:9
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 447 |     let proc_wd = WalkDir::new("/proc");
Dec 19 21:51:27.894 INFO [stderr]     |         ^^^^^^^ help: consider using `_proc_wd` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: variable `event_fd` is assigned to, but never used
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:467:13
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 467 |     let mut event_fd: Option<i32> = None;
Dec 19 21:51:27.894 INFO [stderr]     |             ^^^^^^^^
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr]     = note: consider using `_event_fd` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: value assigned to `event_fd` is never read
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:469:9
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 469 |         event_fd = match eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK) {
Dec 19 21:51:27.894 INFO [stderr]     |         ^^^^^^^^
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: unused variable: `e`
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:497:17
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 497 |             Err(e) => panic!("stat on /proc/self/ns/cgroup failed"),
Dec 19 21:51:27.894 INFO [stderr]     |                 ^ help: consider using `_e` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.894 INFO [stderr] warning: unused variable: `child_wait_fd`
Dec 19 21:51:27.894 INFO [stderr]    --> src/main.rs:509:9
Dec 19 21:51:27.894 INFO [stderr]     |
Dec 19 21:51:27.894 INFO [stderr] 509 |     let child_wait_fd = match eventfd(0, EFD_CLOEXEC) {
Dec 19 21:51:27.894 INFO [stderr]     |         ^^^^^^^^^^^^^ help: consider using `_child_wait_fd` instead
Dec 19 21:51:27.894 INFO [stderr] 
Dec 19 21:51:27.928 INFO [stderr] warning: unused variable: `real_gid`
Dec 19 21:51:27.928 INFO [stderr]   --> src/main.rs:54:35
Dec 19 21:51:27.928 INFO [stderr]    |
Dec 19 21:51:27.928 INFO [stderr] 54 | fn acquire_privs(real_uid: uid_t, real_gid: uid_t) -> bool {
Dec 19 21:51:27.928 INFO [stderr]    |                                   ^^^^^^^^ help: consider using `_real_gid` instead
Dec 19 21:51:27.928 INFO [stderr]    |
Dec 19 21:51:27.928 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:51:27.928 INFO [stderr] 
Dec 19 21:51:27.928 INFO [stderr] warning: unused variable: `overflow_uid`
Dec 19 21:51:27.928 INFO [stderr]    --> src/main.rs:341:10
Dec 19 21:51:27.928 INFO [stderr]     |
Dec 19 21:51:27.928 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 19 21:51:27.928 INFO [stderr]     |          ^^^^^^^^^^^^ help: consider using `_overflow_uid` instead
Dec 19 21:51:27.928 INFO [stderr] 
Dec 19 21:51:27.928 INFO [stderr] warning: unused variable: `overflow_gid`
Dec 19 21:51:27.928 INFO [stderr]    --> src/main.rs:341:24
Dec 19 21:51:27.928 INFO [stderr]     |
Dec 19 21:51:27.928 INFO [stderr] 341 |     let (overflow_uid, overflow_gid) = read_overflowids();
Dec 19 21:51:27.928 INFO [stderr]     |                        ^^^^^^^^^^^^ help: consider using `_overflow_gid` instead
Dec 19 21:51:27.929 INFO [stderr] 
Dec 19 21:51:27.929 INFO [stderr] warning: variable `host_tty_dev` is assigned to, but never used
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:343:13
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 343 |     let mut host_tty_dev: Option<String> = None;
Dec 19 21:51:27.930 INFO [stderr]     |             ^^^^^^^^^^^^
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr]     = note: consider using `_host_tty_dev` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: value assigned to `host_tty_dev` is never read
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:345:9
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 345 |         host_tty_dev = Some(unsafe {
Dec 19 21:51:27.930 INFO [stderr]     |         ^^^^^^^^^^^^
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 19 21:51:27.930 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: unused variable: `opt_sandbox_uid`
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:421:9
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 421 |     let opt_sandbox_uid = match popts.sandbox_uid {
Dec 19 21:51:27.930 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_uid` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: unused variable: `opt_sandbox_gid`
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:425:9
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 425 |     let opt_sandbox_gid = match popts.sandbox_gid {
Dec 19 21:51:27.930 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_opt_sandbox_gid` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: unused variable: `proc_wd`
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:447:9
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 447 |     let proc_wd = WalkDir::new("/proc");
Dec 19 21:51:27.930 INFO [stderr]     |         ^^^^^^^ help: consider using `_proc_wd` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: variable `event_fd` is assigned to, but never used
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:467:13
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 467 |     let mut event_fd: Option<i32> = None;
Dec 19 21:51:27.930 INFO [stderr]     |             ^^^^^^^^
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr]     = note: consider using `_event_fd` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: value assigned to `event_fd` is never read
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:469:9
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 469 |         event_fd = match eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK) {
Dec 19 21:51:27.930 INFO [stderr]     |         ^^^^^^^^
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: unused variable: `e`
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:497:17
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 497 |             Err(e) => panic!("stat on /proc/self/ns/cgroup failed"),
Dec 19 21:51:27.930 INFO [stderr]     |                 ^ help: consider using `_e` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:27.930 INFO [stderr] warning: unused variable: `child_wait_fd`
Dec 19 21:51:27.930 INFO [stderr]    --> src/main.rs:509:9
Dec 19 21:51:27.930 INFO [stderr]     |
Dec 19 21:51:27.930 INFO [stderr] 509 |     let child_wait_fd = match eventfd(0, EFD_CLOEXEC) {
Dec 19 21:51:27.930 INFO [stderr]     |         ^^^^^^^^^^^^^ help: consider using `_child_wait_fd` instead
Dec 19 21:51:27.930 INFO [stderr] 
Dec 19 21:51:28.000 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.68s
Dec 19 21:51:28.309 INFO running `"docker" "inspect" "4c9a010af8c6e50ba626b807d3e4dcbae9b78f45225f0ccdbb6268f5c84f730d"`
Dec 19 21:51:28.419 INFO running `"docker" "rm" "-f" "4c9a010af8c6e50ba626b807d3e4dcbae9b78f45225f0ccdbb6268f5c84f730d"`
Dec 19 21:51:28.546 INFO [stdout] 4c9a010af8c6e50ba626b807d3e4dcbae9b78f45225f0ccdbb6268f5c84f730d