1550513 - RenderBackend panic in project_rect due to NaN

Status: RESOLVED DUPLICATE of bug 1550725

(Core :: Graphics: WebRender, defect, P3)

Description

[Nicolas Silva [:nical]]

Ran into this a couple of times while trying to reproduce another bug, by constantly refreshing the impots.gouv.fr website.

"called Option::unwrap() on a None value"

 871│         ))
 872│     } else {
 873│         // we just checked for all the points to be in positive hemisphere, so `unwrap` is valid
 874│         Some(TypedRect::from_points(&[
 875├>            homogens[0].to_point2d().unwrap(),
 876│             homogens[1].to_point2d().unwrap(),
 877│             homogens[2].to_point2d().unwrap(),
 878│             homogens[3].to_point2d().unwrap(),
 879│         ]))
 880│     }
 881│ }

The coordinates in homogens are all NaN and so are all members of the rect parameter (the transform looks fine).

up the stack in PrimitiveStore::update_visibility the rectangle comes out of the first get_snapped_rect call with an input visible_rect that looks reasonable, a device pixel scale of 1 and map_local_to_raster equal to:

SpaceMapper {
    kind: CoordinateSpaceMapping<webrender_api::units::LayoutPixel, webrender_api::units::RasterPixel>,
    ref_spatial_node_index: SpatialNodeIndex (0),
    current_target_spatial_node_index: SpatialNodeIndex (15),
    bounds: {
        origin: { x: -1e+09, y: -1e+09, }
        size: { width: 2e+09, height: 2e+09, }
    },
    visible_face: VisibleFace::Front
}

Comment 1

[Andrew Osmond [:aosmond] (he/him)]

Whoops, I would have put my patch this if I noticed it was filed :).