There is a bug on Savannah, which truncates the report before the offending character!

With GNU Screen 4.09.00 under Debian/unstable, the double-width characters are not handled correctly.

For instance, run "screen sh", then resize the window to 35 columns (an odd number of columns), then type "cat > /dev/null" and 20 times the character U+1F3E0 HOUSE BUILDING (I can't give the raw Unicode character due to the bug on Savannah). I get

xxxxxxxxxxxxxxxxx
xxx

where I've replaced the U+1F3E0 character by "x", which is normal. But if I increase the width by one column, I still get that instead of

xxxxxxxxxxxxxxxxxx
xx

And if I increase the width again by several columns, I get

xxxxxxxxxxxxxxxxx xxx

i.e. with a space between the first 17 characters and the last 3.

And if I decrease the width again so that only the left part of the U+1F3E0 character should appear, I actually see only the right part in the terminal's margin (i.e. a few pixels).