Package: coreutils
Version: 9.1-1
Severity: normal

Dear Maintainer,

Quoth Issue 7 (and Issue 8 Draft 2.1), XCU, csplit, OPERANDS:
  An error shall be reported if an operand does not reference
  a line between the current position and the end of the file.

Why, then:
-- >8 --
$ seq 999 | csplit - /10/ /^0$/
18
csplit: ‘/^0$/’: match not found
3870
-- >8 --
but
-- >8 --
$ seq 999 | csplit - /10/ 2
18
0
3870
-- >8 --
?

Cf. NetBSD, which gets both right:
-- >8 --
$ seq 999 | csplit - /10/ /^0/
18
csplit: ^0: no match
$ seq 999 | csplit - /10/ 2
18
csplit: 2: can't go backwards
-- >8 --

Best,
наб

-- System Information:
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Architecture: x32 (x86_64)
Foreign Architectures: amd64, i386

Kernel: Linux 6.0.0-6-amd64 (SMP w/2 CPU threads; PREEMPT)
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TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
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Init: systemd (via /run/systemd/system)
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Versions of packages coreutils depends on:
ii  libacl1      2.3.1-2
ii  libattr1     1:2.5.1-3
ii  libc6        2.36-7
ii  libgmp10     2:6.2.1+dfsg1-1.1
ii  libselinux1  3.4-1+b4

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coreutils suggests no packages.

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