invalidSwizzle.vert ERROR: 0:6: 'xx' : does not apply to this type: global void ERROR: 0:7: 'xy' : does not apply to this type: global void ERROR: 2 compilation errors. No code generated. Shader version: 420 ERROR: node is still EOpNull! 0:5 Function Definition: main( ( global void) 0:5 Function Parameters: 0:6 Sequence 0:6 Function Call: f( ( global void) 0:7 Function Call: f( ( global void) 0:? Linker Objects 0:? 'gl_VertexID' ( gl_VertexId int VertexId) 0:? 'gl_InstanceID' ( gl_InstanceId int InstanceId) Linked vertex stage: ERROR: Linking vertex stage: No function definition (body) found: f( Shader version: 420 ERROR: node is still EOpNull! 0:5 Function Definition: main( ( global void) 0:5 Function Parameters: 0:6 Sequence 0:6 Function Call: f( ( global void) 0:7 Function Call: f( ( global void) 0:? Linker Objects 0:? 'gl_VertexID' ( gl_VertexId int VertexId) 0:? 'gl_InstanceID' ( gl_InstanceId int InstanceId)