snap tooltip (Canvastext) not cleaning itself up

[Formerly Kevin Yin, now disabled]

Inkscape 0.91pre1 on Windows 8.1. 1600x900. Zoom is at ~141% (precisely one zoom in from 100%). The zoom matters. I don't know if resolution matters.

Open the attached svg. Turn on snap-to-grid. Using the node tool, drag the bottom left node horizontally to snap to another grid point. Note how the "Cusp node to grid intersection popup" has an odd line rendered on its top.

If you let go of the node, the line will persist.

Note that if you delete the middle node, the behavior will persist. If you delete the topmost node, the behavior will disappear.

[su_v (suv-lp)]

On OS X 10.7.5 (64bit, cairo 1.12.16):
- not reproduced with 0.48.5
- reproduced with 0.48+devel r13454

[jazzynico (jazzynico)]

Also reproduced on Windows XP, Inkscape trunk rev. 14020 (cairo 1.11.2).

[jazzynico (jazzynico)]

Not reproduced on Xubuntu 16.04, Inkscape 0.91 and lp:inkscape/0.92.x rev. 15346 (cairo 1.14.6).

[jazzynico (jazzynico)]

Reproduced on Windows XP (32-bit), Inkscape 0.91.
Not reproduced with Inkscape 0.92 and lp:inkscape/0.92.x rev. 15346.

Note that with 0.48.5 the tooltip background was transparent, so it's very difficult to compare with versions older than 0.91.

Probably fixed when updating the Cairo library from 1.11.2 to 1.14.6.