Merge pull request #11752 from ziglang/zir-fancy-fns

stage2: add missing data to ZIR encoding of functions

Author: andrewrk

src/AstGen.zig

@@ -1595,9 +1595,9 @@ pub const Fn = struct {
         switch (zir_tags[func.zir_body_inst]) {
             .func => return false,
             .func_inferred => return true,
-            .func_extended => {
+            .func_fancy => {
                 const inst_data = zir.instructions.items(.data)[func.zir_body_inst].pl_node;
-                const extra = zir.extraData(Zir.Inst.ExtendedFunc, inst_data.payload_index);
+                const extra = zir.extraData(Zir.Inst.FuncFancy, inst_data.payload_index);
                 return extra.data.bits.is_inferred_error;
             },
             else => unreachable,