Bug #10539: Wrong pattern matching when string interpolation inside regexp is used

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN

[tammo (tammo tjarks)]

Hello,
maybe it is my fault, but I stumble over the fact, that I get a match when I should not (have added a short example).
I use an Array to have a list of matching names like:

a = ['moin','test','whatever']

and when I compare with
strings like

ex_strings = ["TOMATCH moin","SHOULNDTMATCH whatever"]

I get with

str =~ /TOMATCH #{a.join("|")}/

(see attached example) a match for TOMATCH moin as well
as SHOULDNTMATCH whatever. I tried it with other versions as well.
I tried it with older versions of ruby as well with the same result.
Is the use of string Interpolation inside regular expressions problematic?

Best regards,
Tammo

[tammo (tammo tjarks)]

I think I found my error. Sorry
Please Close it.

Best regards,
Tammo

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Rejected

You need parentheses.