Check for newline between statements in blocks

ast.c

@@ -97,7 +97,7 @@ CORD ast_to_xml(ast_t *ast)
     T(Unknown,  "<Unknown>")
     T(Nil, "<Nil>%r</Nil>", type_ast_to_xml(data.type))
     T(Bool, "<Bool value=\"%s\" />", data.b ? "yes" : "no")
-    T(Var, "%s", data.name)
+    T(Var, "<Var>%s</Var>", data.name)
     T(Int, "<Int bits=\"%ld\">%ld</Int>", data.bits, data.i)
     T(Num, "<Num bits=\"%ld\">%g</Num>", data.bits, data.n)
     T(TextLiteral, "%r", xml_escape(data.cord))

parse.c

@@ -1619,7 +1619,16 @@ PARSER(parse_block) {
                 break;
             }
             statements = new(ast_list_t, .ast=stmt, .next=statements);
-            whitespace(&pos); // TODO: check for newline
+            whitespace(&pos);
+
+            // Guard against having two valid statements on the same line, separated by spaces (but no newlines):
+            if (!memchr(stmt->end, '\n', (size_t)(pos - stmt->end))) {
+                if (*pos)
+                    parser_err(ctx, pos, strchrnul(pos, '\n'), "I don't know how to parse the rest of this line");
+                pos = stmt->end;
+                break;
+            }
+
             if (get_indent(ctx, pos) != block_indent) {
                 pos = stmt->end; // backtrack
                 break;