commit 7d88d5e54a9c3fa2b7fb443921c8adb799051784
Author: Panu Matilainen <pmatilai@redhat.com>
Date:   Wed Feb 1 17:48:20 2012 +0200

    Don't free up file info sets on transaction test-runs
    
    - We'd like to get rid of the potentially huge amounts of memory
      eaten by file info sets as early as possible, but when there's a
      chance that we'll get called again with either added transacation
      elements or on-disk changes, such as %pretrans changing something
      underneath us, we need to (be able to) recalculate everything
      from scratch. Only free up the memory when we know we dont need
      it anymore, ie on an actual transaction run.
    - This doesn't change anything for rpm itself, for yum and others
      which do a separate test-transaction first, it means %pretrans
      directory<->symlink replacement hacks and the like have a chance
      of working again. I'm sure there's a bug filed on this somewhere but...
    (cherry picked from commit cef18c94807af0935b7796c462aab8ed39f0f376)

diff --git a/lib/transaction.c b/lib/transaction.c
index 56ebc17..8d29ab9 100644
--- a/lib/transaction.c
+++ b/lib/transaction.c
@@ -1355,12 +1355,14 @@ static int rpmtsPrepare(rpmts ts)
     if (rpmChrootOut())
 	rc = -1;
 
-    /* File info sets, fp caches etc not needed beyond here, free 'em up. */
-    pi = rpmtsiInit(ts);
-    while ((p = rpmtsiNext(pi, 0)) != NULL) {
-	rpmteSetFI(p, NULL);
+    /* On actual transaction, file info sets are not needed after this */
+    if (!(rpmtsFlags(ts) & (RPMTRANS_FLAG_TEST|RPMTRANS_FLAG_BUILD_PROBS))) {
+	pi = rpmtsiInit(ts);
+	while ((p = rpmtsiNext(pi, 0)) != NULL) {
+	    rpmteSetFI(p, NULL);
+	}
+	rpmtsiFree(pi);
     }
-    pi = rpmtsiFree(pi);
 
 exit:
     ht = rpmFpHashFree(ht);