sed-4.9

[Bruce Dubbs]

New minor version.

[Bruce Dubbs]

Noteworthy changes in release 4.9 (2022-11-06) [stable]

Bug fixes

'sed --follow-symlinks -i' no longer loops forever when its operand is a symbolic link cycle. [bug introduced in sed 4.2]

a program with an execution line longer than 2GB can no longer trigger an out-of-bounds memory write.

using the R command to read an input line of length longer than 2GB can no longer trigger an out-of-bounds memory read.

In locales using UTF-8 encoding, the regular expression '.' no longer sometimes fails to match Unicode characters U+D400 through U+D7FF (some Hangul Syllables, and Hangul Jamo Extended-B) and Unicode characters U+108000 through U+10FFFF (half of Supplemental Private Use Area plane B). [bug introduced in sed 4.8]

I/O errors involving temp files no longer confuse sed into using a FILE * pointer after fclosing it, which has undefined behavior in C.

New Features

The 'r' command now accepts address 0, allowing inserting a file before the first line.

Changes in behavior

Sed now prints the less-surprising variant in a corner case of POSIX-unspecified behavior. Before, this would print "n". Now, it prints "X":

printf n | sed 'sn\nnXn'; echo

[Xi Ruoyao]

Fixed at r11.2-173-g9292384ba.