Win7 64bit, AMD FirePro W5100
Broken: 2.76 48f7dd6
mesh.select_linked_pick() fails when attempting to select edges, unattached to faces, whenever those edges have been marked as seams. In vert select mode, nothing is selected; in edge select mode, Blender crashes.
Exact steps for others to reproduce the error
Default scene/settings > Select cube > Enter edit mode > Enter edge select mode > Select all (A) > Enter edge menu (Ctrl E) > Mark seam (A) > Enter delete menu (X) > Only faces (N) > Mouse over edge > Select linked (L) > Blender crashes