[wp-trac] [WordPress Trac] #29187: .notdef glyph (when copying text from a PDF in the excerpt) breaks the /feed

[WordPress Trac]

#29187: .notdef glyph (when copying text from a PDF in the excerpt) breaks the
/feed
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 Reporter:  softmodeling  |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Feeds         |    Version:  trunk
 Severity:  normal        |   Keywords:
  Focuses:                |
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 I created a post where the excerpt was copy&pasted from a pdf document.

 When pasting the text, the "fi" glyph disappears (e.g. "specification" is
 copied over as "specication", this is a common problem, see for instance:
 [http://superuser.com/questions/375449/why-does-the-text-fi-get-cut-when-i
 -copy-from-a-pdf-or-print-a-document]).

 To be more precise, the "fi" glyph is replaced with the .notdef glyph. The
 .notdef glyph is not visible in the Edit Post screen nor when viewing the
 post but it is stored in the database (rendered as a white square, the
 most common representation for this glyph).

 The problem is that, while the glyph is properly filtered when viewing the
 post, it is not when creating the RSS feed so it breaks it.

 For instance, when trying to access it with Google Chrome I get: This page
 contains the following errors:

 error on line 29 at column 25: Input is not proper UTF-8, indicate
 encoding !
 Bytes: 0x0C 0x66 0x69 0x63

 I've been able to reproduce the problem on several sites.

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Ticket URL: <https://core.trac.wordpress.org/ticket/29187>
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