[INFO] fetching crate stacking-iterator 1.0.0...
[INFO] testing stacking-iterator-1.0.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate stacking-iterator 1.0.0 into /workspace/builds/worker-2-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate stacking-iterator 1.0.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "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" "+1.99.0-beta.8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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] 3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957
[INFO] running `Command { std: "docker" "start" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", 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" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", 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" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "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 0.20s
[INFO] running `Command { std: "docker" "inspect" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", 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" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "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 0.84s
[INFO] running `Command { std: "docker" "inspect" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", 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" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "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/deps/stacking_iterator-7c1d8a098fb58385)
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test tests::hello ... ok
[INFO] [stdout] test tests::contract_linked_list ... ok
[INFO] [stdout] test tests::empty ... ok
[INFO] [stdout] test tests::extend_pop ... ok
[INFO] [stdout] test tests::contract_vec_deque ... ok
[INFO] [stdout] test tests::extend_push ... ok
[INFO] [stdout] test tests::implode_string - should panic ... FAILED
[INFO] [stdout] test tests::contract_vec ... ok
[INFO] [stdout] test tests::implode_linked_list - should panic ... ok
[INFO] [stdout] test tests::hello_world ... FAILED
[INFO] [stdout] test tests::implode_empty_vec - should panic ... ok
[INFO] [stdout] test tests::implode_empty_vec_deque - should panic ... ok
[INFO] [stdout] test tests::implode_empty_string - should panic ... FAILED
[INFO] [stdout] test tests::implode_empty_linked_list - should panic ... ok
[INFO] [stdout] test tests::hello_hell ... FAILED
[INFO] [stdout] test tests::contract_string ... FAILED
[INFO] [stdout] test tests::sneaky_empty ... ok
[INFO] [stdout] test tests::implode_vec_deque - should panic ... ok
[INFO] [stdout] test tests::implode_vec - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[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:     0x594d09df2991 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x594d09e06b6a - core[df12db4294e9bfd3]::fmt::write
[INFO] [stdout]    2:     0x594d09df6e2c - <alloc[2182bb758b4b3781]::vec::Vec<u8> as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x594d09dcef86 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x594d09deb0f9 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stdout]    5:     0x594d09d87580 - test[9d35eded1c95d3be]::test_main_inner::<test[9d35eded1c95d3be]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]    6:     0x594d09deb2b2 - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x594d09dcf032 - std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x594d09dc7db9 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x594d09dcfc2d - __rustc[8fa7c3cbc660c2b3]::rust_begin_unwind
[INFO] [stdout]   10:     0x594d09e0729c - core[df12db4294e9bfd3]::panicking::panic_fmt
[INFO] [stdout]   11:     0x594d09e071b3 - core[df12db4294e9bfd3]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x594d09d77826 - core[df12db4294e9bfd3]::panicking::assert_failed::<alloc[2182bb758b4b3781]::vec::Vec<alloc[2182bb758b4b3781]::string::String>, [&str; 3usize]>
[INFO] [stdout]   13:     0x594d09d78525 - stacking_iterator[a13f418b24052e2e]::tests::hello_world
[INFO] [stdout]   14:     0x594d09d7a689 - <stacking_iterator[a13f418b24052e2e]::tests::hello_world::{closure#0} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   15:     0x594d09d7a86b - test[9d35eded1c95d3be]::__rust_begin_short_backtrace::<core[df12db4294e9bfd3]::result::Result<(), alloc[2182bb758b4b3781]::string::String>, fn() -> core[df12db4294e9bfd3]::result::Result<(), alloc[2182bb758b4b3781]::string::String>>
[INFO] [stdout]   16:     0x594d09d87ed5 - test[9d35eded1c95d3be]::run_test::{closure#0}
[INFO] [stdout]   17:     0x594d09d81794 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>
[INFO] [stdout]   18:     0x594d09d8b032 - <std[70759c8f55707aa4]::thread::lifecycle::spawn_unchecked<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>::{closure#1} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   19:     0x594d09df2269 - <std[70759c8f55707aa4]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   20:     0x7439c464adfa - <unknown>
[INFO] [stdout]   21:     0x7439c46de3d4 - clone
[INFO] [stdout]   22:                0x0 - <unknown>
[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::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:     0x594d09df2991 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x594d09e06b6a - core[df12db4294e9bfd3]::fmt::write
[INFO] [stdout]    2:     0x594d09df6e2c - <alloc[2182bb758b4b3781]::vec::Vec<u8> as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x594d09dcef86 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x594d09deb0f9 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stdout]    5:     0x594d09d87580 - test[9d35eded1c95d3be]::test_main_inner::<test[9d35eded1c95d3be]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]    6:     0x594d09deb2b2 - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x594d09dcf032 - std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x594d09dc7db9 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x594d09dcfc2d - __rustc[8fa7c3cbc660c2b3]::rust_begin_unwind
[INFO] [stdout]   10:     0x594d09e0729c - core[df12db4294e9bfd3]::panicking::panic_fmt
[INFO] [stdout]   11:     0x594d09e071b3 - core[df12db4294e9bfd3]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x594d09d777e6 - core[df12db4294e9bfd3]::panicking::assert_failed::<alloc[2182bb758b4b3781]::vec::Vec<alloc[2182bb758b4b3781]::string::String>, [&str; 2usize]>
[INFO] [stdout]   13:     0x594d09d77e4a - stacking_iterator[a13f418b24052e2e]::tests::hello_hell
[INFO] [stdout]   14:     0x594d09d7a649 - <stacking_iterator[a13f418b24052e2e]::tests::hello_hell::{closure#0} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   15:     0x594d09d7a86b - test[9d35eded1c95d3be]::__rust_begin_short_backtrace::<core[df12db4294e9bfd3]::result::Result<(), alloc[2182bb758b4b3781]::string::String>, fn() -> core[df12db4294e9bfd3]::result::Result<(), alloc[2182bb758b4b3781]::string::String>>
[INFO] [stdout]   16:     0x594d09d87ed5 - test[9d35eded1c95d3be]::run_test::{closure#0}
[INFO] [stdout]   17:     0x594d09d81794 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>
[INFO] [stdout]   18:     0x594d09d8b032 - <std[70759c8f55707aa4]::thread::lifecycle::spawn_unchecked<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>::{closure#1} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   19:     0x594d09df2269 - <std[70759c8f55707aa4]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   20:     0x7439c464adfa - <unknown>
[INFO] [stdout]   21:     0x7439c46de3d4 - clone
[INFO] [stdout]   22:                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:     0x594d09df2991 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x594d09e06b6a - core[df12db4294e9bfd3]::fmt::write
[INFO] [stdout]    2:     0x594d09df6e2c - <alloc[2182bb758b4b3781]::vec::Vec<u8> as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x594d09dcef86 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x594d09deb0f9 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stdout]    5:     0x594d09d87580 - test[9d35eded1c95d3be]::test_main_inner::<test[9d35eded1c95d3be]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]    6:     0x594d09deb2b2 - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x594d09dcf032 - std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x594d09dc7db9 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x594d09dcfc2d - __rustc[8fa7c3cbc660c2b3]::rust_begin_unwind
[INFO] [stdout]   10:     0x594d09e0729c - core[df12db4294e9bfd3]::panicking::panic_fmt
[INFO] [stdout]   11:     0x594d09e071b3 - core[df12db4294e9bfd3]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x594d09d779cc - core[df12db4294e9bfd3]::panicking::assert_failed::<alloc[2182bb758b4b3781]::string::String, &str>
[INFO] [stdout]   13:     0x594d09d789d0 - stacking_iterator[a13f418b24052e2e]::tests::contract_string
[INFO] [stdout]   14:     0x594d09d7a6e9 - <stacking_iterator[a13f418b24052e2e]::tests::contract_string::{closure#0} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   15:     0x594d09d7a86b - test[9d35eded1c95d3be]::__rust_begin_short_backtrace::<core[df12db4294e9bfd3]::result::Result<(), alloc[2182bb758b4b3781]::string::String>, fn() -> core[df12db4294e9bfd3]::result::Result<(), alloc[2182bb758b4b3781]::string::String>>
[INFO] [stdout]   16:     0x594d09d87ed5 - test[9d35eded1c95d3be]::run_test::{closure#0}
[INFO] [stdout]   17:     0x594d09d81794 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>
[INFO] [stdout]   18:     0x594d09d8b032 - <std[70759c8f55707aa4]::thread::lifecycle::spawn_unchecked<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>::{closure#1} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   19:     0x594d09df2269 - <std[70759c8f55707aa4]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   20:     0x7439c464adfa - <unknown>
[INFO] [stdout]   21:     0x7439c46de3d4 - clone
[INFO] [stdout]   22:                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" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957", kill_on_drop: false }`
[INFO] [stdout] 3a64b9c4564ed3d18fc6710b22c9e0878098fd2928eae25593e7cbff75eda957
