[INFO] updating cached repository ELD/birdsong [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/ELD/birdsong [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/ELD/birdsong" "work/ex/beta-1.38-1/sources/1.37.0/gh/ELD/birdsong"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ELD/birdsong'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/ELD/birdsong" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ELD/birdsong"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ELD/birdsong'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] b6445df046f60a65218de8ee4a5a93b0d58fa0b8 [INFO] sha for GitHub repo ELD/birdsong: b6445df046f60a65218de8ee4a5a93b0d58fa0b8 [INFO] validating manifest of ELD/birdsong on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of ELD/birdsong on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing ELD/birdsong [INFO] finished frobbing ELD/birdsong [INFO] frobbed toml for ELD/birdsong written to work/ex/beta-1.38-1/sources/1.37.0/gh/ELD/birdsong/Cargo.toml [INFO] started frobbing ELD/birdsong [INFO] finished frobbing ELD/birdsong [INFO] frobbed toml for ELD/birdsong written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ELD/birdsong/Cargo.toml [INFO] crate ELD/birdsong already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing ELD/birdsong against 1.37.0 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ELD/birdsong:/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=warn" "-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" "+1.37.0" "build" "--frozen"` [INFO] [stdout] 816f12f0df63f1097e0aa96007a09e90a9183c44318bee95837cc15acc83bedc [INFO] running `"docker" "start" "-a" "816f12f0df63f1097e0aa96007a09e90a9183c44318bee95837cc15acc83bedc"` [INFO] [stderr] Compiling birdsong v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: use of deprecated item 'core::str::::trim_right': superseded by `trim_end` [INFO] [stderr] --> src/main.rs:24:114 [INFO] [stderr] | [INFO] [stderr] 24 | let tweet = format!("{tweet} {counter}", tweet = source_chars[0..break_index].iter().collect::().trim_right(), counter = format!("({}/2)", iteration)); [INFO] [stderr] | ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(deprecated)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `break_up_tweet` [INFO] [stderr] --> src/main.rs:11:1 [INFO] [stderr] | [INFO] [stderr] 11 | fn break_up_tweet(source_text: String) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `estimate_num_tweets` [INFO] [stderr] --> src/main.rs:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | fn estimate_num_tweets(tweet: &str) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.84s [INFO] running `"docker" "inspect" "816f12f0df63f1097e0aa96007a09e90a9183c44318bee95837cc15acc83bedc"` [INFO] running `"docker" "rm" "-f" "816f12f0df63f1097e0aa96007a09e90a9183c44318bee95837cc15acc83bedc"` [INFO] [stdout] 816f12f0df63f1097e0aa96007a09e90a9183c44318bee95837cc15acc83bedc [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ELD/birdsong:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"` [INFO] [stdout] b3f6f7e9df2b070cbb5258ce6e682cd3fc37b370b834d86a9d1b99aa5c3cd243 [INFO] running `"docker" "start" "-a" "b3f6f7e9df2b070cbb5258ce6e682cd3fc37b370b834d86a9d1b99aa5c3cd243"` [INFO] [stderr] Compiling birdsong v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: use of deprecated item 'core::str::::trim_right': superseded by `trim_end` [INFO] [stderr] --> src/main.rs:24:114 [INFO] [stderr] | [INFO] [stderr] 24 | let tweet = format!("{tweet} {counter}", tweet = source_chars[0..break_index].iter().collect::().trim_right(), counter = format!("({}/2)", iteration)); [INFO] [stderr] | ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(deprecated)] on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.30s [INFO] running `"docker" "inspect" "b3f6f7e9df2b070cbb5258ce6e682cd3fc37b370b834d86a9d1b99aa5c3cd243"` [INFO] running `"docker" "rm" "-f" "b3f6f7e9df2b070cbb5258ce6e682cd3fc37b370b834d86a9d1b99aa5c3cd243"` [INFO] [stdout] b3f6f7e9df2b070cbb5258ce6e682cd3fc37b370b834d86a9d1b99aa5c3cd243 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ELD/birdsong:/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=warn" "-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" "+1.37.0" "test" "--frozen"` [INFO] [stdout] f5c22ea9c7e45d8318e555c51e4543e73de800367460a631cf00fda1dc8862fa [INFO] running `"docker" "start" "-a" "f5c22ea9c7e45d8318e555c51e4543e73de800367460a631cf00fda1dc8862fa"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running /opt/crater/target/debug/deps/birdsong-054c57811a9f337f [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test test::it_breaks_up_a_tweet_into_140_character_strings ... ok [INFO] [stdout] test test::it_estimates_number_of_tweets ... ok [INFO] [stdout] test test::it_dyanmically_figures_out_the_number_of_tweets_to_send ... FAILED [INFO] [stderr] error: test failed, to rerun pass '--bin birdsong' [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- test::it_dyanmically_figures_out_the_number_of_tweets_to_send stdout ---- [INFO] [stdout] thread 'test::it_dyanmically_figures_out_the_number_of_tweets_to_send' panicked at 'attempt to subtract with overflow', src/main.rs:20:29 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x559643f7f44b - backtrace::backtrace::libunwind::trace::hfe5db90796807973 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stdout] 1: 0x559643f7f44b - backtrace::backtrace::trace_unsynchronized::h34b865a835594335 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x559643f7f44b - std::sys_common::backtrace::_print::h527254ae44989167 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stdout] 3: 0x559643f7f44b - std::sys_common::backtrace::print::he85dd5ddddf46503 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stdout] 4: 0x559643f7f44b - std::panicking::default_hook::{{closure}}::h847a2eb38b396f14 [INFO] [stdout] at src/libstd/panicking.rs:200 [INFO] [stdout] 5: 0x559643f7f0ba - std::panicking::default_hook::h2ca0f9a30a0e206b [INFO] [stdout] at src/libstd/panicking.rs:211 [INFO] [stdout] 6: 0x559643f7fbc0 - std::panicking::rust_panic_with_hook::hffcefc09751839d1 [INFO] [stdout] at src/libstd/panicking.rs:477 [INFO] [stdout] 7: 0x559643f7f742 - std::panicking::continue_panic_fmt::hc0f142c930c846fc [INFO] [stdout] at src/libstd/panicking.rs:384 [INFO] [stdout] 8: 0x559643f7f626 - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:311 [INFO] [stdout] 9: 0x559643f9561d - core::panicking::panic_fmt::h2daf88b2616ca2b2 [INFO] [stdout] at src/libcore/panicking.rs:85 [INFO] [stdout] 10: 0x559643f9555c - core::panicking::panic::h2d0bc53a963fb996 [INFO] [stdout] at src/libcore/panicking.rs:49 [INFO] [stdout] 11: 0x559643f2eca8 - birdsong::break_up_tweet::hbad8dde28118cedb [INFO] [stdout] at src/main.rs:20 [INFO] [stdout] 12: 0x559643f2d2d0 - birdsong::test::it_dyanmically_figures_out_the_number_of_tweets_to_send::h300333524ba622ca [INFO] [stdout] at src/main.rs:93 [INFO] [stdout] 13: 0x559643f2d1ba - birdsong::test::it_dyanmically_figures_out_the_number_of_tweets_to_send::{{closure}}::h14d5edbe672fba71 [INFO] [stdout] at src/main.rs:74 [INFO] [stdout] 14: 0x559643f3302e - core::ops::function::FnOnce::call_once::haaf08bab5461fc2a [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libcore/ops/function.rs:231 [INFO] [stdout] 15: 0x559643f4208f - as core::ops::function::FnOnce>::call_once::h4a13ee3f0d7b4201 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/liballoc/boxed.rs:746 [INFO] [stdout] 16: 0x559643f8213a - __rust_maybe_catch_panic [INFO] [stdout] at src/libpanic_unwind/lib.rs:82 [INFO] [stdout] 17: 0x559643f5c688 - std::panicking::try::h5a93466ab2078586 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panicking.rs:275 [INFO] [stdout] 18: 0x559643f5c688 - std::panic::catch_unwind::h752cbeae6ac7bdea [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panic.rs:394 [INFO] [stdout] 19: 0x559643f5c688 - test::run_test::run_test_inner::{{closure}}::h206c9c16936edaca [INFO] [stdout] at src/libtest/lib.rs:1466 [INFO] [stdout] 20: 0x559643f37505 - std::sys_common::backtrace::__rust_begin_short_backtrace::hc7edbac42990d270 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/sys_common/backtrace.rs:77 [INFO] [stdout] 21: 0x559643f3b5c5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::he53c58e7adee87af [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/thread/mod.rs:470 [INFO] [stdout] 22: 0x559643f3b5c5 - as core::ops::function::FnOnce<()>>::call_once::h1aff7c42b6bb3726 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panic.rs:315 [INFO] [stdout] 23: 0x559643f3b5c5 - std::panicking::try::do_call::h41f8559f88100f6c [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panicking.rs:296 [INFO] [stdout] 24: 0x559643f8213a - __rust_maybe_catch_panic [INFO] [stdout] at src/libpanic_unwind/lib.rs:82 [INFO] [stdout] 25: 0x559643f3bcc2 - std::panicking::try::hb54ba808181fe352 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panicking.rs:275 [INFO] [stdout] 26: 0x559643f3bcc2 - std::panic::catch_unwind::h555ccf4e835e93f4 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panic.rs:394 [INFO] [stdout] 27: 0x559643f3bcc2 - std::thread::Builder::spawn_unchecked::{{closure}}::hd4dae6e19e80fc1a [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/thread/mod.rs:469 [INFO] [stdout] 28: 0x559643f3bcc2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc35d54c07710e1a1 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libcore/ops/function.rs:231 [INFO] [stdout] 29: 0x559643f751ef - as core::ops::function::FnOnce>::call_once::h42806b83647d4c79 [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/liballoc/boxed.rs:746 [INFO] [stdout] 30: 0x559643f81890 - as core::ops::function::FnOnce>::call_once::h83c921c8e826dd1d [INFO] [stdout] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/liballoc/boxed.rs:746 [INFO] [stdout] 31: 0x559643f81890 - std::sys_common::thread::start_thread::h2613204ce513782e [INFO] [stdout] at src/libstd/sys_common/thread.rs:13 [INFO] [stdout] 32: 0x559643f81890 - std::sys::unix::thread::Thread::new::thread_start::h4570080769500bcd [INFO] [stdout] at src/libstd/sys/unix/thread.rs:79 [INFO] [stdout] 33: 0x7f0a29e204a4 - start_thread [INFO] [stdout] 34: 0x7f0a2994bd0f - __clone [INFO] [stdout] 35: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] test::it_dyanmically_figures_out_the_number_of_tweets_to_send [INFO] [stdout] [INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "f5c22ea9c7e45d8318e555c51e4543e73de800367460a631cf00fda1dc8862fa"` [INFO] running `"docker" "rm" "-f" "f5c22ea9c7e45d8318e555c51e4543e73de800367460a631cf00fda1dc8862fa"` [INFO] [stdout] f5c22ea9c7e45d8318e555c51e4543e73de800367460a631cf00fda1dc8862fa