document of kbuf allocation size

This may be increased in the future if we add C addr2line support.

1 files changed, 2 insertions, 1 deletions

diff --git a/Mwrap.xs b/Mwrap.xs
index f441ca8..8939b88 100644
--- a/Mwrap.xs
+++ b/Mwrap.xs
@@ -208,8 +208,9 @@ struct alloc_hdr {
         size_t size;
 };
 
+/* $PATHNAME:$LINENO */
 static MWRAP_TSD char kbuf[
-        PATH_MAX + INT2STR_MAX + sizeof(struct alloc_hdr) + 2
+        PATH_MAX + sizeof(":") + INT2STR_MAX + sizeof(struct alloc_hdr)
 ];
 
 static struct alloc_hdr *ptr2hdr(void *p)