Export Data CSV fails when field contains a # character

[dgchrt]

While exporting some data via the Export Data CSV feature, I've noticed incomplete files being generated. After doing some more testing, I've found out the writing of the file would end prematurely exactly at the point where a # character would be found in the field that was being written, e.g. a table containing:

column_a,column_b,column_c
1,blah blah,blah
2,blah #blah,blah
3,blah,blah blah

will produce a file like:

column_a,column_b
1,blah blah blah
2,blah 

Please note that the next column and any other possible record would be skipped entirely.