lexer could not cope with zero length file

2011-06-21 18:30:57 +02:00 · 2011-06-21 18:30:57 +02:00 · 3ca03ea818
parent 4fd3c78388
commit 3ca03ea818
1 changed files with 5 additions and 1 deletions
--- a/ldoc/lexer.lua
+++ b/ldoc/lexer.lua
@ -154,7 +154,11 @@ function lexer.scan (s,matches,filter,options)
    function lex ()
        local i1,i2,idx,res1,res2,tok,pat,fun,capt
        local line = 1
-        if file then s = file:read()..'\n' end
+        if file then
+            s = file:read()
+            if not s then return nil end -- empty file
+            s = s ..'\n'
+         end
        local sz = #s
        local idx = 1
        --print('sz',sz)