[INFO] fetching crate dense 2.0.0...
[INFO] testing dense-2.0.0 against 1.97.0-beta.6 for beta-1.98-1
[INFO] extracting crate dense 2.0.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate dense 2.0.0
[INFO] finished tweaking crates.io crate dense 2.0.0
[INFO] tweaked toml for crates.io crate dense 2.0.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dense 2.0.0 on toolchain 1.97.0-beta.6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.97.0-beta.6" "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" "+1.97.0-beta.6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] [stderr]       Adding ndarray v0.15.6 (available: v0.17.2)
[INFO] [stderr]       Adding num-bytes v0.3.0 (available: v0.4.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.97.0-beta.6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-bytes v0.3.0
[INFO] [stderr]   Downloaded mnist_read v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402
[INFO] running `Command { std: "docker" "start" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", 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" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", 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" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling num-bytes v0.3.0
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-bigint v0.4.8
[INFO] [stderr]    Compiling num-iter v0.1.46
[INFO] [stderr]    Compiling ndarray v0.15.6
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling dense v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.26s
[INFO] running `Command { std: "docker" "inspect" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", 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" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]    Compiling mnist_read v1.0.1
[INFO] [stderr]    Compiling dense v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", 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" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/dense-fa72276e911f6cfc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[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] [stderr]    Doc-tests dense
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - write (line 70) ... FAILED
[INFO] [stdout] test src/lib.rs - read (line 16) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - write (line 70) stdout ----
[INFO] [stdout] Test executable failed (exit status: 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] 
[INFO] [stdout] thread 'main' (295) panicked at src/lib.rs:10:44:
[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:     0x60cce46a18f8 - std[10d71ac2c42b111e]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x60cce46a18f8 - std[10d71ac2c42b111e]::backtrace_rs::backtrace::trace_unsynchronized::<std[10d71ac2c42b111e]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x60cce46a18f8 - std[10d71ac2c42b111e]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x60cce46a18f8 - <<std[10d71ac2c42b111e]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[8fb95b77d25ab6c8]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x60cce46b271a - <core[8fb95b77d25ab6c8]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x60cce46b271a - core[8fb95b77d25ab6c8]::fmt::write
[INFO] [stdout]    6:     0x60cce46a5232 - std[10d71ac2c42b111e]::io::default_write_fmt::<std[10d71ac2c42b111e]::sys::stdio::unix::Stderr>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/io/mod.rs:622:11
[INFO] [stdout]    7:     0x60cce46a5232 - <std[10d71ac2c42b111e]::sys::stdio::unix::Stderr as std[10d71ac2c42b111e]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/io/mod.rs:1977:13
[INFO] [stdout]    8:     0x60cce468d5a6 - <std[10d71ac2c42b111e]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x60cce468d5a6 - std[10d71ac2c42b111e]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x60cce469de21 - std[10d71ac2c42b111e]::panicking::default_hook
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:319:9
[INFO] [stdout]   11:     0x60cce469dfdb - std[10d71ac2c42b111e]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:825:13
[INFO] [stdout]   12:     0x60cce468d662 - std[10d71ac2c42b111e]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:698:13
[INFO] [stdout]   13:     0x60cce4682b69 - std[10d71ac2c42b111e]::sys::backtrace::__rust_end_short_backtrace::<std[10d71ac2c42b111e]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   14:     0x60cce468de4d - __rustc[3be9ba60078d4c86]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:689:5
[INFO] [stdout]   15:     0x60cce46b2e6c - core[8fb95b77d25ab6c8]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/panicking.rs:80:14
[INFO] [stdout]   16:     0x60cce46b2be2 - core[8fb95b77d25ab6c8]::result::unwrap_failed
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/result.rs:1867:5
[INFO] [stdout]   17:     0x60cce466895c - rust_out[45392ab902eb6021]::main::_doctest_main_src_lib_rs_70_0
[INFO] [stdout]   18:     0x60cce4662696 - rust_out[45392ab902eb6021]::main
[INFO] [stdout]   19:     0x60cce46715f3 - <fn() as core[8fb95b77d25ab6c8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   20:     0x60cce465dcf6 - std[10d71ac2c42b111e]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stdout]   21:     0x60cce4661079 - std[10d71ac2c42b111e]::rt::lang_start::<()>::{closure#0}
[INFO] [stdout]   22:     0x60cce469d5c7 - <&dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync as core[8fb95b77d25ab6c8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/ops/function.rs:287:21
[INFO] [stdout]   23:     0x60cce469d5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::do_call::<&dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync, i32>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:581:40
[INFO] [stdout]   24:     0x60cce469d5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::<i32, &dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:544:19
[INFO] [stdout]   25:     0x60cce469d5c7 - std[10d71ac2c42b111e]::panic::catch_unwind::<&dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync, i32>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panic.rs:359:14
[INFO] [stdout]   26:     0x60cce469d5c7 - std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/rt.rs:175:24
[INFO] [stdout]   27:     0x60cce469d5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::do_call::<std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:581:40
[INFO] [stdout]   28:     0x60cce469d5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::<isize, std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:544:19
[INFO] [stdout]   29:     0x60cce469d5c7 - std[10d71ac2c42b111e]::panic::catch_unwind::<std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x60cce469d5c7 - std[10d71ac2c42b111e]::rt::lang_start_internal
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/rt.rs:171:5
[INFO] [stdout]   31:     0x60cce46589a1 - std[10d71ac2c42b111e]::rt::lang_start::<()>
[INFO] [stdout]   32:     0x60cce4672195 - main
[INFO] [stdout]   33:     0x7fa3d0d211ca - <unknown>
[INFO] [stdout]   34:     0x7fa3d0d2128b - __libc_start_main
[INFO] [stdout]   35:     0x60cce4651f55 - _start
[INFO] [stdout]   36:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - read (line 16) stdout ----
[INFO] [stdout] Test executable failed (exit status: 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] 
[INFO] [stdout] thread 'main' (296) panicked at src/lib.rs:10:44:
[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:     0x5bd31c0138f8 - std[10d71ac2c42b111e]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5bd31c0138f8 - std[10d71ac2c42b111e]::backtrace_rs::backtrace::trace_unsynchronized::<std[10d71ac2c42b111e]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5bd31c0138f8 - std[10d71ac2c42b111e]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5bd31c0138f8 - <<std[10d71ac2c42b111e]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[8fb95b77d25ab6c8]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5bd31c02471a - <core[8fb95b77d25ab6c8]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5bd31c02471a - core[8fb95b77d25ab6c8]::fmt::write
[INFO] [stdout]    6:     0x5bd31c017232 - std[10d71ac2c42b111e]::io::default_write_fmt::<std[10d71ac2c42b111e]::sys::stdio::unix::Stderr>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/io/mod.rs:622:11
[INFO] [stdout]    7:     0x5bd31c017232 - <std[10d71ac2c42b111e]::sys::stdio::unix::Stderr as std[10d71ac2c42b111e]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/io/mod.rs:1977:13
[INFO] [stdout]    8:     0x5bd31bfff5a6 - <std[10d71ac2c42b111e]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5bd31bfff5a6 - std[10d71ac2c42b111e]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5bd31c00fe21 - std[10d71ac2c42b111e]::panicking::default_hook
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:319:9
[INFO] [stdout]   11:     0x5bd31c00ffdb - std[10d71ac2c42b111e]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:825:13
[INFO] [stdout]   12:     0x5bd31bfff662 - std[10d71ac2c42b111e]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:698:13
[INFO] [stdout]   13:     0x5bd31bff4b69 - std[10d71ac2c42b111e]::sys::backtrace::__rust_end_short_backtrace::<std[10d71ac2c42b111e]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   14:     0x5bd31bfffe4d - __rustc[3be9ba60078d4c86]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:689:5
[INFO] [stdout]   15:     0x5bd31c024e6c - core[8fb95b77d25ab6c8]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/panicking.rs:80:14
[INFO] [stdout]   16:     0x5bd31c024be2 - core[8fb95b77d25ab6c8]::result::unwrap_failed
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/result.rs:1867:5
[INFO] [stdout]   17:     0x5bd31bfda95c - rust_out[45392ab902eb6021]::main::_doctest_main_src_lib_rs_16_0
[INFO] [stdout]   18:     0x5bd31bfd4696 - rust_out[45392ab902eb6021]::main
[INFO] [stdout]   19:     0x5bd31bfe35f3 - <fn() as core[8fb95b77d25ab6c8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   20:     0x5bd31bfcfcf6 - std[10d71ac2c42b111e]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stdout]   21:     0x5bd31bfd3079 - std[10d71ac2c42b111e]::rt::lang_start::<()>::{closure#0}
[INFO] [stdout]   22:     0x5bd31c00f5c7 - <&dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync as core[8fb95b77d25ab6c8]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/core/src/ops/function.rs:287:21
[INFO] [stdout]   23:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::do_call::<&dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync, i32>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:581:40
[INFO] [stdout]   24:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::<i32, &dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:544:19
[INFO] [stdout]   25:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::panic::catch_unwind::<&dyn core[8fb95b77d25ab6c8]::ops::function::Fn<(), Output = i32> + core[8fb95b77d25ab6c8]::panic::unwind_safe::RefUnwindSafe + core[8fb95b77d25ab6c8]::marker::Sync, i32>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panic.rs:359:14
[INFO] [stdout]   26:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/rt.rs:175:24
[INFO] [stdout]   27:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::do_call::<std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:581:40
[INFO] [stdout]   28:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::panicking::catch_unwind::<isize, std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panicking.rs:544:19
[INFO] [stdout]   29:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::panic::catch_unwind::<std[10d71ac2c42b111e]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x5bd31c00f5c7 - std[10d71ac2c42b111e]::rt::lang_start_internal
[INFO] [stdout]                                at /rustc/b2282dd5646a57d570fc86fbe8df0e8826665ef6/library/std/src/rt.rs:171:5
[INFO] [stdout]   31:     0x5bd31bfca9a1 - std[10d71ac2c42b111e]::rt::lang_start::<()>
[INFO] [stdout]   32:     0x5bd31bfe4195 - main
[INFO] [stdout]   33:     0x70814ccca1ca - <unknown>
[INFO] [stdout]   34:     0x70814ccca28b - __libc_start_main
[INFO] [stdout]   35:     0x5bd31bfc3f55 - _start
[INFO] [stdout]   36:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - read (line 16)
[INFO] [stdout]     src/lib.rs - write (line 70)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.33s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402", kill_on_drop: false }`
[INFO] [stdout] e500927a3a1a5d3e2df539ca2287fa564772f2eacdee77dc5eec7b90c17d5402
