Pixels cut off of some characters in render-glyph

[lte678]

For some glyphs, pixels seem to be cut off in the render-glyph example (mostly, or only with subpixel rendering).
For example: '!'. Here it is only four pixels wide.

The glyph should normally look like this when rendered using the same settings to a larger canvas:

Here it is 5 pixels wide.

I believe this must be because the glyph size returned by raster_bounds() differs from rasterize_glyph() in Freetype.
Looking into raster_bounds(), I see that it does not pass any hinting information to the underlying typographic_bounds() function, but even if those are supplied, the size of the bitmap returned by raster_bounds() still differs from the actual bitmap that is rasterized. Perhaps because raster_bounds gets the size from FT_Glyph_Metrics instead of FT_Bitmap_Size.

This issue also occurs for a couple other letters. N is pretty bad too with these settings.

Font size: 32px
Font: DejaVuSans
HintingOptions: Full
Rasterization: SubpixelAa