[INFO] updating cached repository GrossBetruger/ArithMaster
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/GrossBetruger/ArithMaster
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/GrossBetruger/ArithMaster" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/GrossBetruger/ArithMaster"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/GrossBetruger/ArithMaster'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/GrossBetruger/ArithMaster" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/GrossBetruger/ArithMaster"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/GrossBetruger/ArithMaster'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 30a9b9069a41463ce99179d73f939d44137770fd
[INFO] sha for GitHub repo GrossBetruger/ArithMaster: 30a9b9069a41463ce99179d73f939d44137770fd
[INFO] validating manifest of GrossBetruger/ArithMaster on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of GrossBetruger/ArithMaster on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing GrossBetruger/ArithMaster
[INFO] finished frobbing GrossBetruger/ArithMaster
[INFO] frobbed toml for GrossBetruger/ArithMaster written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/GrossBetruger/ArithMaster/Cargo.toml
[INFO] started frobbing GrossBetruger/ArithMaster
[INFO] finished frobbing GrossBetruger/ArithMaster
[INFO] frobbed toml for GrossBetruger/ArithMaster written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/GrossBetruger/ArithMaster/Cargo.toml
[INFO] crate GrossBetruger/ArithMaster has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing GrossBetruger/ArithMaster against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-0/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/GrossBetruger/ArithMaster:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] 9cf69c3756f1cf92906cfb5de22d9ee5707e6ada0002ee73e3b61f8f4e0584ea
[INFO] running `"docker" "start" "-a" "9cf69c3756f1cf92906cfb5de22d9ee5707e6ada0002ee73e3b61f8f4e0584ea"`
[INFO] [stderr]    Compiling arithmaster v0.1.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.70s
[INFO] running `"docker" "inspect" "9cf69c3756f1cf92906cfb5de22d9ee5707e6ada0002ee73e3b61f8f4e0584ea"`
[INFO] running `"docker" "rm" "-f" "9cf69c3756f1cf92906cfb5de22d9ee5707e6ada0002ee73e3b61f8f4e0584ea"`
[INFO] [stdout] 9cf69c3756f1cf92906cfb5de22d9ee5707e6ada0002ee73e3b61f8f4e0584ea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-0/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/GrossBetruger/ArithMaster:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2f2b3be35fca3319e74e9e678266626b155c67cab0afe1098568cc34d63f198f
[INFO] running `"docker" "start" "-a" "2f2b3be35fca3319e74e9e678266626b155c67cab0afe1098568cc34d63f198f"`
[INFO] [stderr]    Compiling arithmaster v0.1.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `"docker" "inspect" "2f2b3be35fca3319e74e9e678266626b155c67cab0afe1098568cc34d63f198f"`
[INFO] running `"docker" "rm" "-f" "2f2b3be35fca3319e74e9e678266626b155c67cab0afe1098568cc34d63f198f"`
[INFO] [stdout] 2f2b3be35fca3319e74e9e678266626b155c67cab0afe1098568cc34d63f198f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-0/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/GrossBetruger/ArithMaster:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] b73c12bf41874ec0165a06827c41616a4d53ae1898f5e74d8c76bfb3ed7e15be
[INFO] running `"docker" "start" "-a" "b73c12bf41874ec0165a06827c41616a4d53ae1898f5e74d8c76bfb3ed7e15be"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arithmaster-cde81e094a3ace83
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test tests::addition ... ok
[INFO] [stdout] test tests::answer_f34_precision ... ok
[INFO] [stdout] test tests::question_formatting_multiplication ... ok
[INFO] [stdout] test tests::question_formatting_multiplication_no_negatives ... ok
[INFO] [stdout] test tests::question_formatting_addition ... ok
[INFO] [stdout] test tests::question_formatting_exponentiation ... ok
[INFO] [stdout] test tests::exponentiation ... ok
[INFO] [stdout] test tests::multiplication ... ok
[INFO] [stdout] test tests::question_formatting_subtraction ... ok
[INFO] [stdout] test tests::question_formatting_subtraction_both_negatives ... ok
[INFO] [stdout] test tests::superscript ... ok
[INFO] [stdout] test tests::random_generator ... ok
[INFO] [stdout] test tests::subtraction ... ok
[INFO] [stdout] test tests::user_interaction_multiplication ... FAILED
[INFO] [stdout] test tests::user_interaction_exponentiation ... FAILED
[INFO] [stdout] test tests::user_interaction_division ... FAILED
[INFO] [stdout] test tests::user_interaction_addition ... FAILED
[INFO] [stdout] test tests::user_interaction_subtraction ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::user_interaction_multiplication stdout ----
[INFO] [stdout] thread 'tests::user_interaction_multiplication' panicked at 'error creating mock file: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:997:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55d559bb7413 - std[698b411d1b74fcff]::sys::unix::backtrace::tracing::imp::unwind_backtrace
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x55d559bb30bb - std[698b411d1b74fcff]::sys_common::backtrace::_print
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:70
[INFO] [stdout]    2:     0x55d559bb6046 - std[698b411d1b74fcff]::panicking::default_hook::{closure#1}
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:58
[INFO] [stdout]                                at src/libstd/panicking.rs:200
[INFO] [stdout]    3:     0x55d559bb5d47 - std[698b411d1b74fcff]::panicking::default_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:209
[INFO] [stdout]    4:     0x55d559bb6750 - std[698b411d1b74fcff]::panicking::rust_panic_with_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:478
[INFO] [stdout]    5:     0x55d559bb62d1 - std[698b411d1b74fcff]::panicking::continue_panic_fmt
[INFO] [stdout]                                at src/libstd/panicking.rs:385
[INFO] [stdout]    6:     0x55d559bb61b5 - rust_begin_unwind
[INFO] [stdout]                                at src/libstd/panicking.rs:312
[INFO] [stdout]    7:     0x55d559bd094c - core[b849d6d0cd70c3a8]::panicking::panic_fmt
[INFO] [stdout]                                at src/libcore/panicking.rs:85
[INFO] [stdout]    8:     0x55d559b368f2 - core[b849d6d0cd70c3a8]::result::unwrap_failed::<std[698b411d1b74fcff]::io::error::Error>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/macros.rs:16
[INFO] [stdout]    9:     0x55d559b36b1e - <core[b849d6d0cd70c3a8]::result::Result<std[698b411d1b74fcff]::fs::File, std[698b411d1b74fcff]::io::error::Error>>::expect
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/result.rs:825
[INFO] [stdout]   10:     0x55d559b2f0d0 - arithmaster[5e4293f51b8b47ea]::tests::test_exercise
[INFO] [stdout]                                at src/main.rs:428
[INFO] [stdout]   11:     0x55d559b317fa - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_multiplication
[INFO] [stdout]                                at src/main.rs:474
[INFO] [stdout]   12:     0x55d559b31719 - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_multiplication::{closure#0}
[INFO] [stdout]                                at src/main.rs:471
[INFO] [stdout]   13:     0x55d559b3d7ed - <arithmaster[5e4293f51b8b47ea]::tests::user_interaction_multiplication::{closure#0} as core[b849d6d0cd70c3a8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]   14:     0x55d559b4a6ce - <test[ea847f4bd1b1afc4]::run_test::{closure#3} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at src/libtest/lib.rs:1474
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   15:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   16:     0x55d559b64bb7 - test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at src/libtest/lib.rs:1429
[INFO] [stdout]   17:     0x55d559b3ff64 - std[698b411d1b74fcff]::sys_common::backtrace::__rust_begin_short_backtrace::<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/sys_common/backtrace.rs:135
[INFO] [stdout]   18:     0x55d559b3fa84 - std[698b411d1b74fcff]::panicking::try::do_call::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:309
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:297
[INFO] [stdout]   19:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   20:     0x55d559b4a40c - <<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:468
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   21:     0x55d559bb923d - <std[698b411d1b74fcff]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:744
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:14
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:81
[INFO] [stdout]   22:     0x7f96ffcaa493 - start_thread
[INFO] [stdout]   23:     0x7f97002acace - __clone
[INFO] [stdout]   24:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::user_interaction_exponentiation stdout ----
[INFO] [stdout] thread 'tests::user_interaction_exponentiation' panicked at 'error creating mock file: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:997:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55d559bb7413 - std[698b411d1b74fcff]::sys::unix::backtrace::tracing::imp::unwind_backtrace
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x55d559bb30bb - std[698b411d1b74fcff]::sys_common::backtrace::_print
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:70
[INFO] [stdout]    2:     0x55d559bb6046 - std[698b411d1b74fcff]::panicking::default_hook::{closure#1}
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:58
[INFO] [stdout]                                at src/libstd/panicking.rs:200
[INFO] [stdout]    3:     0x55d559bb5d47 - std[698b411d1b74fcff]::panicking::default_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:209
[INFO] [stdout]    4:     0x55d559bb6750 - std[698b411d1b74fcff]::panicking::rust_panic_with_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:478
[INFO] [stdout]    5:     0x55d559bb62d1 - std[698b411d1b74fcff]::panicking::continue_panic_fmt
[INFO] [stdout]                                at src/libstd/panicking.rs:385
[INFO] [stdout]    6:     0x55d559bb61b5 - rust_begin_unwind
[INFO] [stdout]                                at src/libstd/panicking.rs:312
[INFO] [stdout]    7:     0x55d559bd094c - core[b849d6d0cd70c3a8]::panicking::panic_fmt
[INFO] [stdout]                                at src/libcore/panicking.rs:85
[INFO] [stdout]    8:     0x55d559b368f2 - core[b849d6d0cd70c3a8]::result::unwrap_failed::<std[698b411d1b74fcff]::io::error::Error>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/macros.rs:16
[INFO] [stdout]    9:     0x55d559b36b1e - <core[b849d6d0cd70c3a8]::result::Result<std[698b411d1b74fcff]::fs::File, std[698b411d1b74fcff]::io::error::Error>>::expect
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/result.rs:825
[INFO] [stdout]   10:     0x55d559b2f0d0 - arithmaster[5e4293f51b8b47ea]::tests::test_exercise
[INFO] [stdout]                                at src/main.rs:428
[INFO] [stdout]   11:     0x55d559b318e7 - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_exponentiation
[INFO] [stdout]                                at src/main.rs:482
[INFO] [stdout]   12:     0x55d559b31809 - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_exponentiation::{closure#0}
[INFO] [stdout]                                at src/main.rs:479
[INFO] [stdout]   13:     0x55d559b3d42d - <arithmaster[5e4293f51b8b47ea]::tests::user_interaction_exponentiation::{closure#0} as core[b849d6d0cd70c3a8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]   14:     0x55d559b4a6ce - <test[ea847f4bd1b1afc4]::run_test::{closure#3} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at src/libtest/lib.rs:1474
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   15:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   16:     0x55d559b64bb7 - test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at src/libtest/lib.rs:1429
[INFO] [stdout]   17:     0x55d559b3ff64 - std[698b411d1b74fcff]::sys_common::backtrace::__rust_begin_short_backtrace::<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/sys_common/backtrace.rs:135
[INFO] [stdout]   18:     0x55d559b3fa84 - std[698b411d1b74fcff]::panicking::try::do_call::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:309
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:297
[INFO] [stdout]   19:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   20:     0x55d559b4a40c - <<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:468
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   21:     0x55d559bb923d - <std[698b411d1b74fcff]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:744
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:14
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:81
[INFO] [stdout]   22:     0x7f96ffcaa493 - start_thread
[INFO] [stdout]   23:     0x7f97002acace - __clone
[INFO] [stdout]   24:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::user_interaction_division stdout ----
[INFO] [stdout] thread 'tests::user_interaction_division' panicked at 'error creating mock file: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:997:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55d559bb7413 - std[698b411d1b74fcff]::sys::unix::backtrace::tracing::imp::unwind_backtrace
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x55d559bb30bb - std[698b411d1b74fcff]::sys_common::backtrace::_print
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:70
[INFO] [stdout]    2:     0x55d559bb6046 - std[698b411d1b74fcff]::panicking::default_hook::{closure#1}
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:58
[INFO] [stdout]                                at src/libstd/panicking.rs:200
[INFO] [stdout]    3:     0x55d559bb5d47 - std[698b411d1b74fcff]::panicking::default_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:209
[INFO] [stdout]    4:     0x55d559bb6750 - std[698b411d1b74fcff]::panicking::rust_panic_with_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:478
[INFO] [stdout]    5:     0x55d559bb62d1 - std[698b411d1b74fcff]::panicking::continue_panic_fmt
[INFO] [stdout]                                at src/libstd/panicking.rs:385
[INFO] [stdout]    6:     0x55d559bb61b5 - rust_begin_unwind
[INFO] [stdout]                                at src/libstd/panicking.rs:312
[INFO] [stdout]    7:     0x55d559bd094c - core[b849d6d0cd70c3a8]::panicking::panic_fmt
[INFO] [stdout]                                at src/libcore/panicking.rs:85
[INFO] [stdout]    8:     0x55d559b368f2 - core[b849d6d0cd70c3a8]::result::unwrap_failed::<std[698b411d1b74fcff]::io::error::Error>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/macros.rs:16
[INFO] [stdout]    9:     0x55d559b36b1e - <core[b849d6d0cd70c3a8]::result::Result<std[698b411d1b74fcff]::fs::File, std[698b411d1b74fcff]::io::error::Error>>::expect
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/result.rs:825
[INFO] [stdout]   10:     0x55d559b2f0d0 - arithmaster[5e4293f51b8b47ea]::tests::test_exercise
[INFO] [stdout]                                at src/main.rs:428
[INFO] [stdout]   11:     0x55d559b319da - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_division
[INFO] [stdout]                                at src/main.rs:490
[INFO] [stdout]   12:     0x55d559b318f9 - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_division::{closure#0}
[INFO] [stdout]                                at src/main.rs:487
[INFO] [stdout]   13:     0x55d559b3d52d - <arithmaster[5e4293f51b8b47ea]::tests::user_interaction_division::{closure#0} as core[b849d6d0cd70c3a8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]   14:     0x55d559b4a6ce - <test[ea847f4bd1b1afc4]::run_test::{closure#3} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at src/libtest/lib.rs:1474
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   15:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   16:     0x55d559b64bb7 - test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at src/libtest/lib.rs:1429
[INFO] [stdout]   17:     0x55d559b3ff64 - std[698b411d1b74fcff]::sys_common::backtrace::__rust_begin_short_backtrace::<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/sys_common/backtrace.rs:135
[INFO] [stdout]   18:     0x55d559b3fa84 - std[698b411d1b74fcff]::panicking::try::do_call::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:309
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:297
[INFO] [stdout]   19:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   20:     0x55d559b4a40c - <<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:468
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   21:     0x55d559bb923d - <std[698b411d1b74fcff]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:744
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:14
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:81
[INFO] [stdout]   22:     0x7f96ffcaa493 - start_thread
[INFO] [stdout]   23:     0x7f97002acace - __clone
[INFO] [stdout]   24:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::user_interaction_addition stdout ----
[INFO] [stdout] thread 'tests::user_interaction_addition' panicked at 'error creating mock file: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:997:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55d559bb7413 - std[698b411d1b74fcff]::sys::unix::backtrace::tracing::imp::unwind_backtrace
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x55d559bb30bb - std[698b411d1b74fcff]::sys_common::backtrace::_print
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:70
[INFO] [stdout]    2:     0x55d559bb6046 - std[698b411d1b74fcff]::panicking::default_hook::{closure#1}
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:58
[INFO] [stdout]                                at src/libstd/panicking.rs:200
[INFO] [stdout]    3:     0x55d559bb5d47 - std[698b411d1b74fcff]::panicking::default_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:209
[INFO] [stdout]    4:     0x55d559bb6750 - std[698b411d1b74fcff]::panicking::rust_panic_with_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:478
[INFO] [stdout]    5:     0x55d559bb62d1 - std[698b411d1b74fcff]::panicking::continue_panic_fmt
[INFO] [stdout]                                at src/libstd/panicking.rs:385
[INFO] [stdout]    6:     0x55d559bb61b5 - rust_begin_unwind
[INFO] [stdout]                                at src/libstd/panicking.rs:312
[INFO] [stdout]    7:     0x55d559bd094c - core[b849d6d0cd70c3a8]::panicking::panic_fmt
[INFO] [stdout]                                at src/libcore/panicking.rs:85
[INFO] [stdout]    8:     0x55d559b368f2 - core[b849d6d0cd70c3a8]::result::unwrap_failed::<std[698b411d1b74fcff]::io::error::Error>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/macros.rs:16
[INFO] [stdout]    9:     0x55d559b36b1e - <core[b849d6d0cd70c3a8]::result::Result<std[698b411d1b74fcff]::fs::File, std[698b411d1b74fcff]::io::error::Error>>::expect
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/result.rs:825
[INFO] [stdout]   10:     0x55d559b2f0d0 - arithmaster[5e4293f51b8b47ea]::tests::test_exercise
[INFO] [stdout]                                at src/main.rs:428
[INFO] [stdout]   11:     0x55d559b3161a - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_addition
[INFO] [stdout]                                at src/main.rs:458
[INFO] [stdout]   12:     0x55d559b31539 - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_addition::{closure#0}
[INFO] [stdout]                                at src/main.rs:455
[INFO] [stdout]   13:     0x55d559b3d5ad - <arithmaster[5e4293f51b8b47ea]::tests::user_interaction_addition::{closure#0} as core[b849d6d0cd70c3a8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]   14:     0x55d559b4a6ce - <test[ea847f4bd1b1afc4]::run_test::{closure#3} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at src/libtest/lib.rs:1474
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   15:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   16:     0x55d559b64bb7 - test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at src/libtest/lib.rs:1429
[INFO] [stdout]   17:     0x55d559b3ff64 - std[698b411d1b74fcff]::sys_common::backtrace::__rust_begin_short_backtrace::<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/sys_common/backtrace.rs:135
[INFO] [stdout]   18:     0x55d559b3fa84 - std[698b411d1b74fcff]::panicking::try::do_call::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:309
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:297
[INFO] [stdout]   19:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   20:     0x55d559b4a40c - <<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:468
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   21:     0x55d559bb923d - <std[698b411d1b74fcff]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:744
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:14
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:81
[INFO] [stdout]   22:     0x7f96ffcaa493 - start_thread
[INFO] [stdout]   23:     0x7f97002acace - __clone
[INFO] [stdout]   24:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::user_interaction_subtraction stdout ----
[INFO] [stdout] thread 'tests::user_interaction_subtraction' panicked at 'error creating mock file: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:997:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55d559bb7413 - std[698b411d1b74fcff]::sys::unix::backtrace::tracing::imp::unwind_backtrace
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x55d559bb30bb - std[698b411d1b74fcff]::sys_common::backtrace::_print
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:70
[INFO] [stdout]    2:     0x55d559bb6046 - std[698b411d1b74fcff]::panicking::default_hook::{closure#1}
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:58
[INFO] [stdout]                                at src/libstd/panicking.rs:200
[INFO] [stdout]    3:     0x55d559bb5d47 - std[698b411d1b74fcff]::panicking::default_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:209
[INFO] [stdout]    4:     0x55d559bb6750 - std[698b411d1b74fcff]::panicking::rust_panic_with_hook
[INFO] [stdout]                                at src/libstd/panicking.rs:478
[INFO] [stdout]    5:     0x55d559bb62d1 - std[698b411d1b74fcff]::panicking::continue_panic_fmt
[INFO] [stdout]                                at src/libstd/panicking.rs:385
[INFO] [stdout]    6:     0x55d559bb61b5 - rust_begin_unwind
[INFO] [stdout]                                at src/libstd/panicking.rs:312
[INFO] [stdout]    7:     0x55d559bd094c - core[b849d6d0cd70c3a8]::panicking::panic_fmt
[INFO] [stdout]                                at src/libcore/panicking.rs:85
[INFO] [stdout]    8:     0x55d559b368f2 - core[b849d6d0cd70c3a8]::result::unwrap_failed::<std[698b411d1b74fcff]::io::error::Error>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/macros.rs:16
[INFO] [stdout]    9:     0x55d559b36b1e - <core[b849d6d0cd70c3a8]::result::Result<std[698b411d1b74fcff]::fs::File, std[698b411d1b74fcff]::io::error::Error>>::expect
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/result.rs:825
[INFO] [stdout]   10:     0x55d559b2f0d0 - arithmaster[5e4293f51b8b47ea]::tests::test_exercise
[INFO] [stdout]                                at src/main.rs:428
[INFO] [stdout]   11:     0x55d559b3170a - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_subtraction
[INFO] [stdout]                                at src/main.rs:466
[INFO] [stdout]   12:     0x55d559b31629 - arithmaster[5e4293f51b8b47ea]::tests::user_interaction_subtraction::{closure#0}
[INFO] [stdout]                                at src/main.rs:463
[INFO] [stdout]   13:     0x55d559b3d46d - <arithmaster[5e4293f51b8b47ea]::tests::user_interaction_subtraction::{closure#0} as core[b849d6d0cd70c3a8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]   14:     0x55d559b4a6ce - <test[ea847f4bd1b1afc4]::run_test::{closure#3} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at src/libtest/lib.rs:1474
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libcore/ops/function.rs:231
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   15:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   16:     0x55d559b64bb7 - test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at src/libtest/lib.rs:1429
[INFO] [stdout]   17:     0x55d559b3ff64 - std[698b411d1b74fcff]::sys_common::backtrace::__rust_begin_short_backtrace::<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/sys_common/backtrace.rs:135
[INFO] [stdout]   18:     0x55d559b3fa84 - std[698b411d1b74fcff]::panicking::try::do_call::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:309
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:297
[INFO] [stdout]   19:     0x55d559bb9a89 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stdout]   20:     0x55d559b4a40c - <<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<test[ea847f4bd1b1afc4]::run_test::run_test_inner::{closure#0}, ()>::{closure#0} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:468
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stdout]   21:     0x55d559bb923d - <std[698b411d1b74fcff]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:744
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:14
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:81
[INFO] [stdout]   22:     0x7f96ffcaa493 - start_thread
[INFO] [stdout]   23:     0x7f97002acace - __clone
[INFO] [stdout]   24:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::user_interaction_addition
[INFO] [stdout]     tests::user_interaction_division
[INFO] [stdout]     tests::user_interaction_exponentiation
[INFO] [stdout]     tests::user_interaction_multiplication
[INFO] [stdout]     tests::user_interaction_subtraction
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 13 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--bin arithmaster'
[INFO] running `"docker" "inspect" "b73c12bf41874ec0165a06827c41616a4d53ae1898f5e74d8c76bfb3ed7e15be"`
[INFO] running `"docker" "rm" "-f" "b73c12bf41874ec0165a06827c41616a4d53ae1898f5e74d8c76bfb3ed7e15be"`
[INFO] [stdout] b73c12bf41874ec0165a06827c41616a4d53ae1898f5e74d8c76bfb3ed7e15be