[INFO] fetching crate stacking-iterator 1.0.0...
[INFO] testing stacking-iterator-1.0.0 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate stacking-iterator 1.0.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate stacking-iterator 1.0.0
[INFO] finished tweaking crates.io crate stacking-iterator 1.0.0
[INFO] tweaked toml for crates.io crate stacking-iterator 1.0.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stacking-iterator 1.0.0 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288
[INFO] running `Command { std: "docker" "start" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacking-iterator v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacking-iterator v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--release", kill_on_drop: false }`
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/release/build/stacking-iterator/7c1d8a098fb58385/out/stacking_iterator-7c1d8a098fb58385)
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test tests::contract_vec ... ok
[INFO] [stdout] test tests::contract_linked_list ... ok
[INFO] [stdout] test tests::extend_pop ... ok
[INFO] [stdout] test tests::hello ... ok
[INFO] [stdout] test tests::extend_push ... ok
[INFO] [stdout] test tests::contract_vec_deque ... ok
[INFO] [stdout] test tests::empty ... ok
[INFO] [stdout] test tests::implode_empty_string - should panic ... FAILED
[INFO] [stdout] test tests::implode_empty_vec_deque - should panic ... ok
[INFO] [stdout] test tests::implode_string - should panic ... FAILED
[INFO] [stdout] test tests::implode_empty_vec - should panic ... ok
[INFO] [stdout] test tests::implode_linked_list - should panic ... ok
[INFO] [stdout] test tests::implode_vec - should panic ... ok
[INFO] [stdout] test tests::implode_vec_deque - should panic ... ok
[INFO] [stdout] test tests::implode_empty_linked_list - should panic ... ok
[INFO] [stdout] test tests::sneaky_empty ... ok
[INFO] [stdout] test tests::hello_world ... FAILED
[INFO] [stdout] test tests::contract_string ... FAILED
[INFO] [stdout] test tests::hello_hell ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::implode_empty_string stdout ----
[INFO] [stdout] note: test did not panic as expected at src/lib.rs:565:8
[INFO] [stdout] ---- tests::implode_string stdout ----
[INFO] [stdout] note: test did not panic as expected at src/lib.rs:572:8
[INFO] [stdout] ---- tests::hello_world stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::hello_world' (159) panicked at src/lib.rs:623:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: ["hello", "hel", "world"]
[INFO] [stdout]  right: ["hello", "hell", "world"]
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5f71d4c86611 - <<std[617be2ca0a6fd877]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[a373ad73a504971]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x5f71d4c9a50a - core[a373ad73a504971]::fmt::write
[INFO] [stdout]    2:     0x5f71d4c8a82c - <alloc[2e1b2a31b91974c5]::vec::Vec<u8> as core[a373ad73a504971]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x5f71d4c62a76 - std[617be2ca0a6fd877]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x5f71d4c7eca9 - std[617be2ca0a6fd877]::panicking::default_hook
[INFO] [stdout]    5:     0x5f71d4c1b350 - test[aada8e7e76ba119b]::test_main_inner::{closure#0}
[INFO] [stdout]    6:     0x5f71d4c7ee62 - std[617be2ca0a6fd877]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x5f71d4c62b22 - std[617be2ca0a6fd877]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x5f71d4c5b839 - std[617be2ca0a6fd877]::sys::backtrace::__rust_end_short_backtrace::<std[617be2ca0a6fd877]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x5f71d4c6372d - __rustc[ea4f61d10b84890b]::rust_begin_unwind
[INFO] [stdout]   10:     0x5f71d4c9ac3c - core[a373ad73a504971]::panicking::panic_fmt
[INFO] [stdout]   11:     0x5f71d4c9ab53 - core[a373ad73a504971]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x5f71d4c0c3e6 - core[a373ad73a504971]::panicking::assert_failed::<alloc[2e1b2a31b91974c5]::vec::Vec<alloc[2e1b2a31b91974c5]::string::String>, [&str; 3usize]>
[INFO] [stdout]   13:     0x5f71d4c0d3c5 - <stacking_iterator[931c5dfb36bef394]::tests::hello_world::{closure#0} as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   14:     0x5f71d4c0e79b - test[aada8e7e76ba119b]::__rust_begin_short_backtrace::<core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>, fn() -> core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>>
[INFO] [stdout]   15:     0x5f71d4c1b975 - test[aada8e7e76ba119b]::run_test::{closure#0}
[INFO] [stdout]   16:     0x5f71d4c15264 - std[617be2ca0a6fd877]::sys::backtrace::__rust_begin_short_backtrace::<test[aada8e7e76ba119b]::run_test::{closure#1}, ()>
[INFO] [stdout]   17:     0x5f71d4c1ea02 - <std[617be2ca0a6fd877]::thread::lifecycle::spawn_unchecked<test[aada8e7e76ba119b]::run_test::{closure#1}, ()>::{closure#1} as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   18:     0x5f71d4c85e6f - <std[617be2ca0a6fd877]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   19:     0x7ca45290bdfa - <unknown>
[INFO] [stdout]   20:     0x7ca45299f3d4 - clone
[INFO] [stdout]   21:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::contract_string stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::contract_string' (151) panicked at src/lib.rs:511:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: "世界こんにち"
[INFO] [stdout]  right: "世界こんにちは"
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5f71d4c86611 - <<std[617be2ca0a6fd877]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[a373ad73a504971]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x5f71d4c9a50a - core[a373ad73a504971]::fmt::write
[INFO] [stdout]    2:     0x5f71d4c8a82c - <alloc[2e1b2a31b91974c5]::vec::Vec<u8> as core[a373ad73a504971]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x5f71d4c62a76 - std[617be2ca0a6fd877]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x5f71d4c7eca9 - std[617be2ca0a6fd877]::panicking::default_hook
[INFO] [stdout]    5:     0x5f71d4c1b350 - test[aada8e7e76ba119b]::test_main_inner::{closure#0}
[INFO] [stdout]    6:     0x5f71d4c7ee62 - std[617be2ca0a6fd877]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x5f71d4c62b22 - std[617be2ca0a6fd877]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x5f71d4c5b839 - std[617be2ca0a6fd877]::sys::backtrace::__rust_end_short_backtrace::<std[617be2ca0a6fd877]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x5f71d4c6372d - __rustc[ea4f61d10b84890b]::rust_begin_unwind
[INFO] [stdout]   10:     0x5f71d4c9ac3c - core[a373ad73a504971]::panicking::panic_fmt
[INFO] [stdout]   11:     0x5f71d4c9ab53 - core[a373ad73a504971]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x5f71d4c0c588 - core[a373ad73a504971]::panicking::assert_failed::<alloc[2e1b2a31b91974c5]::string::String, &str>
[INFO] [stdout]   13:     0x5f71d4c0d890 - <stacking_iterator[931c5dfb36bef394]::tests::contract_string::{closure#0} as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   14:     0x5f71d4c0e79b - test[aada8e7e76ba119b]::__rust_begin_short_backtrace::<core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>, fn() -> core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>>
[INFO] [stdout]   15:     0x5f71d4c1b975 - test[aada8e7e76ba119b]::run_test::{closure#0}
[INFO] [stdout]   16:     0x5f71d4c15264 - std[617be2ca0a6fd877]::sys::backtrace::__rust_begin_short_backtrace::<test[aada8e7e76ba119b]::run_test::{closure#1}, ()>
[INFO] [stdout]   17:     0x5f71d4c1ea02 - <std[617be2ca0a6fd877]::thread::lifecycle::spawn_unchecked<test[aada8e7e76ba119b]::run_test::{closure#1}, ()>::{closure#1} as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   18:     0x5f71d4c85e6f - <std[617be2ca0a6fd877]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   19:     0x7ca45290bdfa - <unknown>
[INFO] [stdout]   20:     0x7ca45299f3d4 - clone
[INFO] [stdout]   21:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::hello_hell stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::hello_hell' (158) panicked at src/lib.rs:616:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: ["hello", "hel"]
[INFO] [stdout]  right: ["hello", "hell"]
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5f71d4c86611 - <<std[617be2ca0a6fd877]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[a373ad73a504971]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x5f71d4c9a50a - core[a373ad73a504971]::fmt::write
[INFO] [stdout]    2:     0x5f71d4c8a82c - <alloc[2e1b2a31b91974c5]::vec::Vec<u8> as core[a373ad73a504971]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x5f71d4c62a76 - std[617be2ca0a6fd877]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x5f71d4c7eca9 - std[617be2ca0a6fd877]::panicking::default_hook
[INFO] [stdout]    5:     0x5f71d4c1b350 - test[aada8e7e76ba119b]::test_main_inner::{closure#0}
[INFO] [stdout]    6:     0x5f71d4c7ee62 - std[617be2ca0a6fd877]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x5f71d4c62b22 - std[617be2ca0a6fd877]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x5f71d4c5b839 - std[617be2ca0a6fd877]::sys::backtrace::__rust_end_short_backtrace::<std[617be2ca0a6fd877]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x5f71d4c6372d - __rustc[ea4f61d10b84890b]::rust_begin_unwind
[INFO] [stdout]   10:     0x5f71d4c9ac3c - core[a373ad73a504971]::panicking::panic_fmt
[INFO] [stdout]   11:     0x5f71d4c9ab53 - core[a373ad73a504971]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x5f71d4c0c3a6 - core[a373ad73a504971]::panicking::assert_failed::<alloc[2e1b2a31b91974c5]::vec::Vec<alloc[2e1b2a31b91974c5]::string::String>, [&str; 2usize]>
[INFO] [stdout]   13:     0x5f71d4c0cccf - <stacking_iterator[931c5dfb36bef394]::tests::hello_hell::{closure#0} as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   14:     0x5f71d4c0e79b - test[aada8e7e76ba119b]::__rust_begin_short_backtrace::<core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>, fn() -> core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>>
[INFO] [stdout]   15:     0x5f71d4c1b975 - test[aada8e7e76ba119b]::run_test::{closure#0}
[INFO] [stdout]   16:     0x5f71d4c15264 - std[617be2ca0a6fd877]::sys::backtrace::__rust_begin_short_backtrace::<test[aada8e7e76ba119b]::run_test::{closure#1}, ()>
[INFO] [stdout]   17:     0x5f71d4c1ea02 - <std[617be2ca0a6fd877]::thread::lifecycle::spawn_unchecked<test[aada8e7e76ba119b]::run_test::{closure#1}, ()>::{closure#1} as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   18:     0x5f71d4c85e6f - <std[617be2ca0a6fd877]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   19:     0x7ca45290bdfa - <unknown>
[INFO] [stdout]   20:     0x7ca45299f3d4 - clone
[INFO] [stdout]   21:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::contract_string
[INFO] [stdout]     tests::hello_hell
[INFO] [stdout]     tests::hello_world
[INFO] [stdout]     tests::implode_empty_string
[INFO] [stdout]     tests::implode_string
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 14 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288", kill_on_drop: false }`
[INFO] [stdout] 3bd8edeeb3ebca7cc30356274d9f77f7d13475e37040282194a0761775f1a288
