[INFO] fetching crate flexrc 0.2.0...
[INFO] testing flexrc-0.2.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate flexrc 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate flexrc 0.2.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate flexrc 0.2.0
[INFO] tweaked toml for crates.io crate flexrc 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate flexrc 0.2.0 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] crate crates.io crate flexrc 0.2.0 already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d
[INFO] running `Command { std: "docker" "start" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", 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" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d" "/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" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", 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" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling flexrc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", 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" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d" "/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 flexrc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", 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" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d" "/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/flexrc-655145b2ee37a188)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running tests/behavior.rs (/opt/rustwide/target/release/deps/behavior-b13e90d4a6d85447)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test regular_consuming_conversion_fails_when_not_unique ... ok
[INFO] [stdout] test regular_into_other_clones_data_when_in_place_conversion_fails ... ok
[INFO] [stdout] test hybrid_shared_to_local_fails_when_local_is_already_present ... ok
[INFO] [stdout] test byte_slice_round_trips_through_regular_promotion ... ok
[INFO] [stdout] test small_rc_standard_api_surface ... ok
[INFO] [stdout] test thread_hybrid_shared_to_local_recovers_on_same_thread ... ok
[INFO] [stdout] test small_arc_standard_api_surface ... ok
[INFO] [stdout] test small_str_round_trips_through_promotion ... ok
[INFO] [stdout] test thread_arc_standard_api_surface ... ok
[INFO] [stdout] test hybrid_shared_to_local_retains_and_transfers_counts ... ok
[INFO] [stdout] test get_mut_only_succeeds_for_unique_owners ... ok
[INFO] [stdout] test regular_shared_into_local_transfers_unique_allocation ... ok
[INFO] [stdout] test hybrid_rc_standard_api_surface ... ok
[INFO] [stdout] test thread_str_round_trips_through_promotion ... ok
[INFO] [stdout] test thread_hybrid_shared_to_local_rejects_other_threads ... ok
[INFO] [stdout] test hybrid_local_to_shared_retains_and_transfers_counts ... FAILED
[INFO] [stdout] test thread_rc_standard_api_surface ... ok
[INFO] [stdout] test regular_local_into_shared_transfers_unique_allocation ... ok
[INFO] [stdout] test hybrid_str_round_trips_through_promotion ... FAILED
[INFO] [stdout] test hybrid_arc_standard_api_surface ... ok
[INFO] [stderr] error: test failed, to rerun pass `--test behavior`
[INFO] [stdout] test metadata_sizes_match_active_counter_widths ... ok
[INFO] [stdout] test shared_handles_clone_and_drop_across_threads ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- hybrid_local_to_shared_retains_and_transfers_counts stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'hybrid_local_to_shared_retains_and_transfers_counts' (273) panicked at tests/behavior.rs:83:5:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: 0
[INFO] [stdout]  right: 1
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5a8ed8ae0611 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x5a8ed8af481a - core[df12db4294e9bfd3]::fmt::write
[INFO] [stdout]    2:     0x5a8ed8ae4aac - <alloc[2182bb758b4b3781]::vec::Vec<u8> as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x5a8ed8abcc06 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x5a8ed8ad8d79 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stdout]    5:     0x5a8ed8a751d0 - test[9d35eded1c95d3be]::test_main_inner::<test[9d35eded1c95d3be]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]    6:     0x5a8ed8ad8f32 - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x5a8ed8abccb2 - std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x5a8ed8ab5a39 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x5a8ed8abd8ad - __rustc[8fa7c3cbc660c2b3]::rust_begin_unwind
[INFO] [stdout]   10:     0x5a8ed8af4f4c - core[df12db4294e9bfd3]::panicking::panic_fmt
[INFO] [stdout]   11:     0x5a8ed8af4e63 - core[df12db4294e9bfd3]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x5a8ed8af1758 - core[df12db4294e9bfd3]::panicking::assert_failed::<usize, usize>
[INFO] [stdout]   13:     0x5a8ed8a62478 - <behavior[466052a17d35d716]::hybrid_local_to_shared_retains_and_transfers_counts::{closure#0} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   14:     0x5a8ed8a684bb - 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]   15:     0x5a8ed8a75b25 - test[9d35eded1c95d3be]::run_test::{closure#0}
[INFO] [stdout]   16:     0x5a8ed8a6f3e4 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>
[INFO] [stdout]   17:     0x5a8ed8a78c82 - <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]   18:     0x5a8ed8adfee9 - <std[70759c8f55707aa4]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   19:     0x70fb877a0dfa - <unknown>
[INFO] [stdout]   20:     0x70fb878343d4 - clone
[INFO] [stdout]   21:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- hybrid_str_round_trips_through_promotion stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'hybrid_str_round_trips_through_promotion' (277) panicked at tests/behavior.rs:70:19:
[INFO] [stdout] unique str should recover local ownership
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5a8ed8ae0611 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x5a8ed8af481a - core[df12db4294e9bfd3]::fmt::write
[INFO] [stdout]    2:     0x5a8ed8ae4aac - <alloc[2182bb758b4b3781]::vec::Vec<u8> as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stdout]    3:     0x5a8ed8abcc06 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x5a8ed8ad8d79 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stdout]    5:     0x5a8ed8a751d0 - test[9d35eded1c95d3be]::test_main_inner::<test[9d35eded1c95d3be]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]    6:     0x5a8ed8ad8f32 - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x5a8ed8abccb2 - std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x5a8ed8ab5a39 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x5a8ed8abd8ad - __rustc[8fa7c3cbc660c2b3]::rust_begin_unwind
[INFO] [stdout]   10:     0x5a8ed8af4f4c - core[df12db4294e9bfd3]::panicking::panic_fmt
[INFO] [stdout]   11:     0x5a8ed8a60a53 - <behavior[466052a17d35d716]::hybrid_str_round_trips_through_promotion::{closure#0} as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   12:     0x5a8ed8a684bb - 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]   13:     0x5a8ed8a75b25 - test[9d35eded1c95d3be]::run_test::{closure#0}
[INFO] [stdout]   14:     0x5a8ed8a6f3e4 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<test[9d35eded1c95d3be]::run_test::{closure#1}, ()>
[INFO] [stdout]   15:     0x5a8ed8a78c82 - <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]   16:     0x5a8ed8adfee9 - <std[70759c8f55707aa4]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   17:     0x70fb877a0dfa - <unknown>
[INFO] [stdout]   18:     0x70fb878343d4 - clone
[INFO] [stdout]   19:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     hybrid_local_to_shared_retains_and_transfers_counts
[INFO] [stdout]     hybrid_str_round_trips_through_promotion
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 20 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d", kill_on_drop: false }`
[INFO] [stdout] d435aa0ca1bfdefd7179d14d5a13adbef9f2a935c05b753e7a47cde9317bb03d
