expand, unexpand: Properly handle I/O errors

[dezgeg]

No description provided.

[dezgeg]

Part of #9857

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will improve performance by 56.2%

_{Comparing dezgeg:io_errors (e3fbbd8) with main (9cc9ca8)}

Summary

⚡ 2 improved benchmarks
✅ 140 untouched benchmarks
⏩ 180 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	expand_many_lines[100000]	150.6 ms	96.4 ms	+56.2%
⚡	Simulation	expand_custom_tabstops[50000]	37.9 ms	25.1 ms	+50.68%

Footnotes

1. 180 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/tail/truncate. tests/tail/truncate is passing on 'main'. Maybe you have to rebase?
Skip an intermittent issue tests/shuf/shuf-reservoir (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/sort/sort-stale-thread-mem (fails in this run but passes in the 'main' branch)

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/shuf/shuf-reservoir (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/sort/sort-stale-thread-mem (fails in this run but passes in the 'main' branch)

[dezgeg]

The remaining error seems unrelated intermittent one:

error: test failed, to rerun pass `-p coreutils --test tests`
failures:

---- test_sleep::test_sleep_stops_after_sigbus stdout ----
bin: "/Users/runner/work/coreutils/coreutils/target/x86_64-apple-darwin/debug/coreutils"
run: /Users/runner/work/coreutils/coreutils/target/x86_64-apple-darwin/debug/coreutils sleep 100

thread 'test_sleep::test_sleep_stops_after_sigbus' panicked at tests/uutests/src/lib/util.rs:2453:14:
called `Result::unwrap()` on an `Err` value: Custom { kind: Other, error: "kill: Timeout of '10s' reached" }
stack backtrace:
   0: rust_begin_unwind
             at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:692:5
   1: core::panicking::panic_fmt
             at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/panicking.rs:75:14
   2: core::result::unwrap_failed
             at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/result.rs:1704:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/result.rs:1109:23
   4: uutests::util::UChild::kill_with_custom_signal
             at ./tests/uutests/src/lib/util.rs:2444:9
   5: tests::test_sleep::test_sleep_stops_after_sigbus
             at ./tests/by-util/test_sleep.rs:167:5
   6: tests::test_sleep::test_sleep_stops_after_sigbus::{{closure}}
             at ./tests/by-util/test_sleep.rs:161:35
   7: core::ops::function::FnOnce::call_once
             at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/ops/function.rs:250:5
   8: core::ops::function::FnOnce::call_once
             at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.


failures:
    test_sleep::test_sleep_stops_after_sigbus

test result: FAILED. 4341 passed; 1 failed; 77 ignored; 0 measured; 0 filtered out; finished in 391.34s

I can't seem to locate the rerun tests button