[pdftex] space chars are lost in overfull lines

[Ulrike Fischer]

In the following example I'm activating interword space chars. In
the first line this works fine. The second line is slightly overfull
and there the space chars are lost.

\pdfinterwordspaceon
\pdfcompresslevel=0
\pdfobjcompresslevel=0
\hsize=5cm
a a

a a xxxxxxxxxxxxxxxxxxxx.
a a
\bye

First line in the PDF:

Td [(a)]TJ/F51 9.9626 Tf( )Tj/F1 9.9626 Tf 8.302 0 Td [(a)]TJ

overfull line without space chars:
Td [(a)-222(a)-222(xxxxxxxxxxxxxxxxxxxx.)

next line of the paragraph
Td [(a)]TJ/F51 9.9626 Tf( )Tj/F1 9.9626 Tf 8.302 0 Td [(a)]


-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/