Why am I seeing this when using man pages?

Apple owns this screwup with the man command (and some others) spewing duplicate class implementation gibberish. To avoid this, I have implemented in my ~/.zshrc file, the following alias:

alias man='man "$@" 2> /dev/null'



and then man provides quick, clean output by redirecting all of the nonsense to the bit bucket.

For that alias to take effect in the same Terminal session, do the following, otherwise a new Terminal session will pick it up:

source ~/.zshrc



This is what I am getting with your command

GREP(1)                      General Commands Manual                     GREP(1)

NAME

     grep, egrep, fgrep, rgrep, bzgrep, bzegrep, bzfgrep, zgrep, zegrep, zfgrep

     – file pattern searcher

SYNOPSIS

     grep [-abcdDEFGHhIiJLlMmnOopqRSsUVvwXxZz] [-A num] [-B num] [-C[num]]

          [-e pattern] [-f file] [--binary-files=value] [--color[=when]]

          [--colour[=when]] [--context[=num]] [--label] [--line-buffered]

          [--null] [pattern] [file ...]

DESCRIPTION

     The grep utility searches any given input files, selecting lines that match

     one or more patterns.  By default, a pattern matches an input line if the

     regular expression (RE) in the pattern matches the input line without its

     trailing newline.  An empty expression matches every line.  Each input line

     that matches at least one of the patterns is written to the standard

     output.

     grep is used for simple patterns and basic regular expressions (BREs);

     egrep can handle extended regular expressions (EREs).  See re_format(7) for

     more information on regular expressions.  fgrep is quicker than both grep

Something in the Terminal file profile may have become corrupted guess work here.

That, if so, honestly is outside my area of skill-set.

Perhaps a more Learned Colleague will pick up the question and shed more insights and or solutions

I have Xcode 13.3 installed, and I can't recall if the Monterey issue existed prior to its installation or not. 🧠zzzzz…

Commands that I compile myself from Swift or Objective-C, as arm64, do not sprew what you posted earlier, they are clean output as expected.

You syntax fails on macOS 12.3.1, but the following works:

freya: ~ % sudo xcode-select -s /Library/Developer/CommandLineTools/    
freya: ~ % xcode-select -p
/Library/Developer/CommandLineTools
freya: ~ % 

After that, I disabled the /dev/null alias for man and the prior spewing behavior has ended.

Are you talking about a Linux product?

I think you need to explain your issue in greater detail: Writing an effective Apple Support Commun… - Apple Community

This worked for me

sudo xcode-select -s /Library/Developer/CommandLineTools

as mentioned in this developer connection URL

symbol collision being reported on… | Apple Developer Forums

You are welcome. Haven't found the actual cause of it yet…