Fixed a ICE on calldata to struct member copy

test/libsolidity/syntaxTests/array/copy_from_function_type.sol

@@ -0,0 +1,9 @@
+// Example from https://github.com/ethereum/solidity/issues/12558
+pragma abicoder v2;
+contract C {
+  function() external[1][] s0;
+  constructor(function() external[1][] memory i0)
+  {
+    i0[0] = s0[1];
+  }
+}