Hi , dear monks

I'm using expect to detect login sequences, and I'm facing this un-explicable behaviour of my regex

This is the regex

(([#%:>~\$\] ])(?!\2)){3,4}|([\w\-\.]*)\$ *$|(\w[@\/]\w|sftp).*?[#%>~\
+$\]]|^[#%\$>\:]~] *$
[download]

And the text it fails against is shown below.

This regex runs correctly in Perl 5.30

And it fails in Perl 5.34

It works as expected in testing websites as : https://regex101.com/

I expected to match this sequence --> : ~#

But instead is matching --> \s\s#

as seen in the "Match string message below"

Match string: ` #'


I would like to confirm with your wisdom before opening bug request.

######################################################################
+########
# This system is a restricted access system.                          
+       #
# If collected security information reveals possible criminal activity
+ that  #
# exceeds privileges, evidence of such activity may be provided to the
+ rele- #
# vant authorities for further action. By continuing past this point, 
+you    #
# expressly consent to this security monitoring.                      
+       #
######################################################################
+########

hostname: ~# 

spawn id(5): Does `###################################################
+###########################\r\n# This system is a restricted access s
+ystem.                                 #\r\n# If collected security i
+nformation reveals possible criminal activity that  #\r\n# exceeds pr
+ivileges, evidence of such activity may be provided to the rele- #\r\
+n# vant authorities for further action. By continuing past this point
+, you    #\r\n# expressly consent to this security monitoring.       
+                      #\r\n##########################################
+####################################\r\n\r\nhostname: ~# '
match:
  pattern #2: -eof `'? No.
  pattern #3: -re `\\[__PAC__SUDO__PROMPT__\\]'? No.
  pattern #4: -re `^.+ontinue connecting \\(([^/]+)\\/([^/]+)(?:[^)]+)
+?\\)\\?\\s*$'? No.
  pattern #5: -re `.*(any key to continue|tecla para continuar).*'? No
+.
  pattern #6: -re `.*ffending .*key in (.+?)\\:(\\d+).*'? No.
  pattern #7: -re `([lL]ogin|[uU]suario|([uU]ser-?)*[nN]ame.*|[uU]ser)
+\\s*:\\s*$'? No.
  pattern #8: -re `([pP]ass|[pP]ass[wW]or[dt](\\s+for\\s+|\\w+@[\\w\\-
+\\.]+)*|[cC]ontrase.a|Enter passphrase for key \'.+\')\\s*:\\s*$'? No
+.
  pattern #9: -re `(([#%:>~\\$\\] ])(?!\\2)){3,4}|([\\w\\-\\.]*)\\$ *$
+|\\w[@\\/]\\w.*?[#%>~\\$\\]]|^[#%\\$>\\:]~] *$'? YES!!
    Before match string: `############################################
+##################################\r\n# This system is a restricted a
+ccess system.                               '
    Match string: `  #'
    After match string: `\r\n# If collected security information revea
+ls possible criminal activity that  #\r\n# exceeds privileges, eviden
+ce of such activity may be provided to the rele- #\r\n# vant authorit
+ies for further action. By continuing past this point, you    #\r\n# 
+expressly consent to this security monitoring.                       
+      #\r\n##########################################################
+####################\r\n\r\n\r\nhostname: ~# '
    Matchlist: (`#',  `#',  `')
Calling hook CODE(0x55f2fb33fe20)...
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.