* fns.c (Flength): Don't overflow int when computing a list length.

Use EMACS_INT, not int, to avoid unwanted truncation on 64-bit hosts.
Check for QUIT every 1024 entries rather than every other entry;
that's faster and is responsive enough.  Report an error instead of
overflowing an integer.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index dd61843bc85..5d70c56cc5c 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,11 @@
 2011-06-14  Paul Eggert  <eggert@cs.ucla.edu>
 
+        * fns.c (Flength): Don't overflow int when computing a list length.
+        Use EMACS_INT, not int, to avoid unwanted truncation on 64-bit hosts.
+        Check for QUIT every 1024 entries rather than every other entry;
+        that's faster and is responsive enough.  Report an error instead of
+        overflowing an integer.
+
         * alloc.c: Check that resized vectors' lengths fit in fixnums.
         (header_size, word_size): New constants.
         (allocate_vectorlike): Don't check size overflow here.