add support for errcode in or{} optional blocks.

vlib/v/checker/checker.v

@@ -834,10 +834,12 @@ pub fn (c mut Checker) expr(node ast.Expr) table.Type {
 			it.expr_type = c.expr(it.expr)
 			return table.string_type
 		}
-		else {}
-		// println('checker.expr(): unhandled node')
-		// TODO: find nil string bug triggered with typeof
-		// println('checker.expr(): unhandled node (${typeof(node)})')
+		else {
+			tnode := typeof(node)
+			if tnode != 'unknown v.ast.Expr' {
+				println('checker.expr(): unhandled node with typeof(`${tnode}`)')
+			}
+		}
 	}
 	return table.void_type
 }

vlib/v/parser/fn.v

@@ -23,6 +23,10 @@ pub fn (p mut Parser) call_expr(is_c bool, mod string) ast.CallExpr {
 			name: 'err'
 			typ: table.string_type
 		})
+		p.scope.register('errcode', ast.Var{
+			name: 'errcode'
+			typ: table.int_type
+		})
 		or_stmts = p.parse_block_no_scope()
 		p.close_scope()
 	}

vlib/v/parser/parser.v

@@ -965,6 +965,10 @@ fn (p mut Parser) dot_expr(left ast.Expr) ast.Expr {
 		if p.tok.kind == .key_orelse {
 			p.next()
 			p.open_scope()
+			p.scope.register('errcode', ast.Var{
+				name: 'errcode'
+				typ: table.int_type
+			})
 			p.scope.register('err', ast.Var{
 				name: 'err'
 				typ: table.string_type