Undocking viewport while mesh exists, crashes KNOSSOS

[my-tien]

when undocking ortho vp

Warning: QOpenGLShader::link: Vertex info
-----------
0(15) : error C1013: function "main" is already defined at 0(15)

Fragment info
-------------
0(12) : error C1013: function "main" is already defined at 0(12)

Warning: QOpenGLShader::link: Vertex info
-----------
0(12) : error C1013: function "main" is already defined at 0(12)

Fragment info
-------------
0(12) : error C1013: function "main" is already defined at 0(12)

Warning: QOpenGLShader::link: Vertex info
-----------
0(14) : error C1013: function "main" is already defined at 0(14)

Fragment info
-------------
0(13) : error C1013: function "main" is already defined at 0(13)

Debug: "Vertex info\n-----------\n0(15) : error C1013: function \"main\" is already defined at 0(15)\n\nFragment info\n-------------\n0(12) : error C1013: function \"main\" is already defined at 0(12)\n"
Debug: "Vertex info\n-----------\n0(12) : error C1013: function \"main\" is already defined at 0(12)\n\nFragment info\n-------------\n0(12) : error C1013: function \"main\" is already defined at 0(12)\n"
Debug: "Vertex info\n-----------\n0(14) : error C1013: function \"main\" is already defined at 0(14)\n\nFragment info\n-------------\n0(13) : error C1013: function \"main\" is already defined at 0(13)\n"

[my-tien]

when undocking 3d vp

Warning: QOpenGLShaderProgram::uniformLocation(modelview_matrix): shader program is not linked
Warning: QOpenGLShaderProgram::uniformLocation(projection_matrix): shader program is not linked
Warning: QOpenGLShaderProgram::uniformLocation(vp_normal): shader program is not linked
Warning: QOpenGLShaderProgram::attributeLocation(vertex): shader program is not linked
Warning: QOpenGLShaderProgram::attributeLocation(normal): shader program is not linked
Warning: QOpenGLShaderProgram::attributeLocation(color): shader program is not linked
Warning: QOpenGLShaderProgram::uniformLocation(tree_color): shader program is not linked