The indeterminism in the test file TIFFOffsetA4PL.pcl was caused by

the new custom page size implementation.  The new code updates the
current page structure instead of creating a new one - later the page
size logic doesn't recognize a page size change and doesn't clear the
page (erasepage) properly.  The custom page size implementation is
less than ideal, but the simple fix here is to just erase the page
unconditionally when the custom page size command is received.  There
was no bug reported for this problem.

1 files changed, 2 insertions, 0 deletions

diff --git a/pcl/pcpage.c b/pcl/pcpage.c
index cb4d1f18f..8db2661a7 100644
--- a/pcl/pcpage.c
+++ b/pcl/pcpage.c
@@ -1008,6 +1008,8 @@ set_logical_page(
     pcur_paper->offset_landscape = pl_get_int16(plogpage->TopOffset) * 10;
 
     new_page_size(pcs, pcur_paper, false, false);
+    gs_erasepage(pcs->pgs);
+    pcs->page_marked = false;
     return 0;
 }