[INFO] fetching crate incremental-writer 0.1.2... [INFO] testing incremental-writer-0.1.2 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1 [INFO] extracting crate incremental-writer 0.1.2 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate incremental-writer 0.1.2 [INFO] finished tweaking crates.io crate incremental-writer 0.1.2 [INFO] tweaked toml for crates.io crate incremental-writer 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate incremental-writer 0.1.2 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate incremental-writer 0.1.2 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] cbd37f0c4a7dd62f46d8405e465c5963f01533905154e78e4c2356762e1d8b23 [INFO] running `Command { std: "docker" "start" "-a" "cbd37f0c4a7dd62f46d8405e465c5963f01533905154e78e4c2356762e1d8b23", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cbd37f0c4a7dd62f46d8405e465c5963f01533905154e78e4c2356762e1d8b23", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cbd37f0c4a7dd62f46d8405e465c5963f01533905154e78e4c2356762e1d8b23", kill_on_drop: false }` [INFO] [stdout] cbd37f0c4a7dd62f46d8405e465c5963f01533905154e78e4c2356762e1d8b23 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 146b83e555f7b771c50674f01ae3dc500ca462b40d4932b8209e48b7c7cbc520 [INFO] running `Command { std: "docker" "start" "-a" "146b83e555f7b771c50674f01ae3dc500ca462b40d4932b8209e48b7c7cbc520", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.19 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.38 [INFO] [stderr] Compiling serde_derive v1.0.115 [INFO] [stderr] Compiling serde v1.0.115 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling serde_json v1.0.57 [INFO] [stderr] Compiling itoa v0.4.6 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Compiling incremental-writer v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: struct `Record` is never constructed [INFO] [stdout] --> src/json/mod.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 104 | struct Record { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.86s [INFO] running `Command { std: "docker" "inspect" "146b83e555f7b771c50674f01ae3dc500ca462b40d4932b8209e48b7c7cbc520", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "146b83e555f7b771c50674f01ae3dc500ca462b40d4932b8209e48b7c7cbc520", kill_on_drop: false }` [INFO] [stdout] 146b83e555f7b771c50674f01ae3dc500ca462b40d4932b8209e48b7c7cbc520 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 4622789f6478d5f2dce5246fa9eb365b4e8200d410fa4f9b5427172408681232 [INFO] running `Command { std: "docker" "start" "-a" "4622789f6478d5f2dce5246fa9eb365b4e8200d410fa4f9b5427172408681232", kill_on_drop: false }` [INFO] [stdout] warning: struct `Record` is never constructed [INFO] [stdout] --> src/json/mod.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 104 | struct Record { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling incremental-writer v0.1.2 (/opt/rustwide/workdir) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.56s [INFO] running `Command { std: "docker" "inspect" "4622789f6478d5f2dce5246fa9eb365b4e8200d410fa4f9b5427172408681232", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4622789f6478d5f2dce5246fa9eb365b4e8200d410fa4f9b5427172408681232", kill_on_drop: false }` [INFO] [stdout] 4622789f6478d5f2dce5246fa9eb365b4e8200d410fa4f9b5427172408681232 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] deba3992aa05ca1095175c3157956f049dbc34e9290f684a17e533c46efe1e9d [INFO] running `Command { std: "docker" "start" "-a" "deba3992aa05ca1095175c3157956f049dbc34e9290f684a17e533c46efe1e9d", kill_on_drop: false }` [INFO] [stderr] warning: struct `Record` is never constructed [INFO] [stderr] --> src/json/mod.rs:104:8 [INFO] [stderr] | [INFO] [stderr] 104 | struct Record { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `incremental-writer` (lib) generated 1 warning [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/incremental_writer-f0f80d6a6991dd3f) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test json::writer_writes_square_brackets_to_buffer ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- json::writer_writes_square_brackets_to_buffer stdout ---- [INFO] [stdout] [INFO] [stdout] thread 'json::writer_writes_square_brackets_to_buffer' (25) panicked at src/json/mod.rs:81:46: [INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" } [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x629b96195ba2 - std::backtrace_rs::backtrace::libunwind::trace::hc4a5f428cfb78751 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stdout] 1: 0x629b96195ba2 - std::backtrace_rs::backtrace::trace_unsynchronized::h20e1095684b4c296 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stdout] 2: 0x629b96195ba2 - std::sys::backtrace::_print_fmt::h461f2e3a8f6b29e2 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:66:9 [INFO] [stdout] 3: 0x629b96195ba2 - ::fmt::h4ee3a75aa71a2c45 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:39:26 [INFO] [stdout] 4: 0x629b961b83af - core::fmt::rt::Argument::fmt::h6f1564705cd089af [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/fmt/rt.rs:173:76 [INFO] [stdout] 5: 0x629b961b83af - core::fmt::write::h21ca93b65a7c281a [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/fmt/mod.rs:1468:25 [INFO] [stdout] 6: 0x629b961829a3 - std::io::default_write_fmt::h6f3360f4711e9130 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/io/mod.rs:639:11 [INFO] [stdout] 7: 0x629b961829a3 - std::io::Write::write_fmt::hf4539125c0e0bc30 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/io/mod.rs:1954:13 [INFO] [stdout] 8: 0x629b961961b2 - std::sys::backtrace::BacktraceLock::print::h58d5d73f9e953cf1 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:42:9 [INFO] [stdout] 9: 0x629b96180ffc - std::panicking::default_hook::{{closure}}::h1457fbe47c9457d1 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:301:27 [INFO] [stdout] 10: 0x629b96180e74 - std::panicking::default_hook::hccb5e73b206c0830 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:325:9 [INFO] [stdout] 11: 0x629b961327ce - as core::ops::function::Fn>::call::h04940a86aa899793 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/alloc/src/boxed.rs:1985:9 [INFO] [stdout] 12: 0x629b961327ce - test::test_main_with_exit_callback::{{closure}}::hca6cc295403b83e8 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/test/src/lib.rs:145:21 [INFO] [stdout] 13: 0x629b96181c53 - as core::ops::function::Fn>::call::h9d85285925beb538 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/alloc/src/boxed.rs:1985:9 [INFO] [stdout] 14: 0x629b96181c53 - std::panicking::panic_with_hook::h3190ecc6229cdd29 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:842:13 [INFO] [stdout] 15: 0x629b96195fba - std::panicking::panic_handler::{{closure}}::ha1f1b769bc2bb40c [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:707:13 [INFO] [stdout] 16: 0x629b96195f19 - std::sys::backtrace::__rust_end_short_backtrace::h5f9cf66f19c2a172 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:174:18 [INFO] [stdout] 17: 0x629b961818fd - __rustc[a93bd50104b99ad4]::rust_begin_unwind [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:698:5 [INFO] [stdout] 18: 0x629b961bf360 - core::panicking::panic_fmt::hc70c3c83f13c1375 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/panicking.rs:75:14 [INFO] [stdout] 19: 0x629b961c04b6 - core::result::unwrap_failed::ha809bf80017a514a [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/result.rs:1852:5 [INFO] [stdout] 20: 0x629b9611e2e1 - core::result::Result::unwrap::h7a0f4cf1f7bccb3c [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/result.rs:1223:23 [INFO] [stdout] 21: 0x629b9611e2e1 - incremental_writer::json::writer_writes_square_brackets_to_buffer::h89fe5ba1b0f4982f [INFO] [stdout] at /opt/rustwide/workdir/src/json/mod.rs:81:46 [INFO] [stdout] 22: 0x629b9611f8e7 - incremental_writer::json::writer_writes_square_brackets_to_buffer::{{closure}}::heae46aaa0bd020ea [INFO] [stdout] at /opt/rustwide/workdir/src/json/mod.rs:64:45 [INFO] [stdout] 23: 0x629b961192f6 - core::ops::function::FnOnce::call_once::h2232b1d04a1482e2 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/ops/function.rs:253:5 [INFO] [stdout] 24: 0x629b9613384b - core::ops::function::FnOnce::call_once::h70d190c46966003b [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/ops/function.rs:253:5 [INFO] [stdout] 25: 0x629b9613384b - test::__rust_begin_short_backtrace::hb077ccaabb17d2ec [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/test/src/lib.rs:663:18 [INFO] [stdout] 26: 0x629b961314b5 - test::run_test_in_process::{{closure}}::hd73eeb633a1507bd [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/test/src/lib.rs:686:74 [INFO] [stdout] 27: 0x629b961314b5 - as core::ops::function::FnOnce<()>>::call_once::h033c82756fc9d192 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/panic/unwind_safe.rs:272:9 [INFO] [stdout] 28: 0x629b961314b5 - std::panicking::catch_unwind::do_call::h734b44e243d34585 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:590:40 [INFO] [stdout] 29: 0x629b961314b5 - std::panicking::catch_unwind::h5e85417122517fb1 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:553:19 [INFO] [stdout] 30: 0x629b961314b5 - std::panic::catch_unwind::h0900e58a82a7d188 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panic.rs:359:14 [INFO] [stdout] 31: 0x629b961314b5 - test::run_test_in_process::h27721efd62ae77d0 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/test/src/lib.rs:686:27 [INFO] [stdout] 32: 0x629b961314b5 - test::run_test::{{closure}}::h8b1264838cc597aa [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/test/src/lib.rs:607:43 [INFO] [stdout] 33: 0x629b961583c4 - test::run_test::{{closure}}::h6ecb96835e2eae4f [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/test/src/lib.rs:637:41 [INFO] [stdout] 34: 0x629b961583c4 - std::sys::backtrace::__rust_begin_short_backtrace::h098f38ee82a820a7 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:158:18 [INFO] [stdout] 35: 0x629b9613efda - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h042592f748f5e369 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/thread/mod.rs:559:17 [INFO] [stdout] 36: 0x629b9613efda - as core::ops::function::FnOnce<()>>::call_once::h134fe7f3a2d9ec8d [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/panic/unwind_safe.rs:272:9 [INFO] [stdout] 37: 0x629b9613efda - std::panicking::catch_unwind::do_call::heb87d604f60aee16 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:590:40 [INFO] [stdout] 38: 0x629b9613efda - std::panicking::catch_unwind::h2203a0f553b89fd7 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:553:19 [INFO] [stdout] 39: 0x629b9613efda - std::panic::catch_unwind::h4d383e0b0e25d838 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panic.rs:359:14 [INFO] [stdout] 40: 0x629b9613efda - std::thread::Builder::spawn_unchecked_::{{closure}}::h76cbdd4635cfd58b [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/thread/mod.rs:557:30 [INFO] [stdout] 41: 0x629b9613efda - core::ops::function::FnOnce::call_once{{vtable.shim}}::he72e066680f5e267 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/ops/function.rs:253:5 [INFO] [stdout] 42: 0x629b9616c68f - as core::ops::function::FnOnce>::call_once::h1b9c6fea2cbefc68 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/alloc/src/boxed.rs:1971:9 [INFO] [stdout] 43: 0x629b9616c68f - std::sys::pal::unix::thread::Thread::new::thread_start::h92caa992bc760789 [INFO] [stdout] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/pal/unix/thread.rs:107:17 [INFO] [stdout] 44: 0x76171c4fcaa4 - [INFO] [stdout] 45: 0x76171c589a34 - clone [INFO] [stdout] 46: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] json::writer_writes_square_brackets_to_buffer [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass `--lib` [INFO] running `Command { std: "docker" "inspect" "deba3992aa05ca1095175c3157956f049dbc34e9290f684a17e533c46efe1e9d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "deba3992aa05ca1095175c3157956f049dbc34e9290f684a17e533c46efe1e9d", kill_on_drop: false }` [INFO] [stdout] deba3992aa05ca1095175c3157956f049dbc34e9290f684a17e533c46efe1e9d