1 files changed, 2 insertions, 0 deletions

@@ -146,6 +146,7 @@ function read.scan (chars)
                                 token, chars = consume_symbol(chars)
                                 return token, "symbol"
                         end
+                        if #chars == 0 then return nil end
                 end
         end
 end
@@ -173,6 +174,7 @@ read.readmacros = {
                                 else
                                         table.insert(L, nt)
                                 end
+                                assert(tokens[1], "Unexpected EOF")
                         end
                         pop(tokens)     -- remove final ")"
                         return type.List(L, lt)