[letterspace] fix double free with disc components

Adress issue #350

For some reason our stack copy of the current node gets double-freed.
Since the “components” field will probably vanish soon, we can get by
for now by skipping the explicit free.

1 files changed, 1 insertions, 4 deletions

diff --git a/src/luaotfload-letterspace.lua b/src/luaotfload-letterspace.lua
index 40b3015..21a9136 100644
--- a/src/luaotfload-letterspace.lua
+++ b/src/luaotfload-letterspace.lua
@@ -28,9 +28,6 @@ local setfield           = nodedirect.setfield
 local field_setter = function (name) return function (n, ...) setfield (n, name, ...) end end
 local field_getter = function (name) return function (n, ...) getfield (n, name, ...) end end
 
---- As of December 2014 the faster ``node.direct.*`` interface is
---- preferred.
-
 local getfont            = nodedirect.getfont
 local getid              = nodedirect.getid
 
@@ -351,7 +348,7 @@ kerncharacters = function (head)
             end
             start = c
             setfield(s, "components", nil)
-            free_node(s)
+            --free_node(s) --> double free with multipart components
             c = getfield (start, "components")
           end
         end