1 files changed, 3 insertions, 0 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 83007657e20..eba9d867c8c 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -4774,6 +4774,9 @@ gc_sweep ()
 
         for (; sym < end; ++sym)
           {
+            /* Check if the symbol was created during loadup.  In such a case
+               it might be pointed to by pure bytecode which we don't trace,
+               so we conservatively assume that it is live.  */
             int pure_p = PURE_POINTER_P (sym->name);
             
             if (!XMARKBIT (sym->plist) && !pure_p)