Re: [I] [R] read_csv_arrow fails when a string contains a backslash-escaped quote mark followed by a comma [arrow]

["thisisnic (via GitHub)" <gi...@apache.org>]

thisisnic commented on issue #33405:
URL: https://github.com/apache/arrow/issues/33405#issuecomment-4276118548

   Reproducible in 23.0.1 and re-triaged with Claude - verify before fixing
   
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   The C++ CSV parser supports combining quoting + escaping, and Python passes both options correctly. However, the R binding in `csv___ParseOptions__initialize()` sets `escape_char` but never sets the escaping boolean — it's missing entirely. So escaping stays at its C++ default (false) regardless of what R users pass.
   
   Relevant code: https://github.com/apache/arrow/blob/b3362f2d241248a435ce53ae85bf3cf5c65d1432/r/src/csv.cpp#L60-L72
   
   One-line fix: add res->escaping = cpp11::as_cpp<bool>(options["escaping"]); after the escape_char line.


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