error: queries overflow the depth limit!                                
  --> re/xilinx/naming/spartan6/src/lib.rs:48:27                                                                                                                                                
   |                                             
48 |                 (get_name(bels::IPAD_CLKP0), get_name(bels::IPAD_CLKN0)),        
   |                           ^^^^^^^^^^^^^^^^                                  
   |                                                                
   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`prjcombine_re_xilinx_naming_spartan6`)                                   
   = note: query depth increased by 130 when simplifying constant for the type system `prjcombine_spartan6::bels::IPAD_CLKP0`