https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223524
Bug ID: 223524
Summary: whatis 'c++' fails with regex error
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
The manual page of whatis(1) claims that the search is by default
“case-insensitive substring matching”
By default, apropos searches for makewhatis(8) databases in the default
paths stipulated by man(1) and uses case-insensitive substring matching
(the = operator) over manual names and descriptions
whatis is a synonym for apropos -f.
-f Search for all words in expression in manual page names only.
The search is case insensitive and matches whole words only. In
this mode, macro keys, comparison operators, and logical
operators are not available.
But when I tried to search for the term “c++” I get an regcomp error:
$ whatis 'c++'
whatis: regcomp /[[:<:]]c++[[:>:]]/: repetition-operator operand invalid
whatis: ignoring trailing c++
usage: whatis [-afk] [-C file] [-M path] [-m path] [-O outkey] [-S arch]
[-s section] name ...
Quoting the plus character returns zero results:
$ whatis 'c\+\+'
whatis: nothing appropriate
Using a single plus gives some results:
$ whatis 'c+'
c++filt(1) - decode C++ symbols
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