[pypy-commit] pypy faster-rstruct-2: fix marshal

[antocuni]

Author: Antonio Cuni <anto.cuni at gmail.com>
Branch: faster-rstruct-2
Changeset: r91236:9142d98549d9
Date: 2017-05-11 01:03 +0200
http://bitbucket.org/pypy/pypy/changeset/9142d98549d9/

Log:	fix marshal

diff --git a/pypy/objspace/std/marshal_impl.py b/pypy/objspace/std/marshal_impl.py
--- a/pypy/objspace/std/marshal_impl.py
+++ b/pypy/objspace/std/marshal_impl.py
@@ -1,5 +1,5 @@
 from rpython.rlib.rarithmetic import LONG_BIT, r_longlong, r_uint
-from rpython.rlib.rstring import StringBuilder
+from rpython.rlib.mutbuffer import MutableStringBuffer
 from rpython.rlib.rstruct import ieee
 from rpython.rlib.unroll import unrolling_iterable
 
@@ -191,9 +191,9 @@
 
 
 def pack_float(f):
-    result = StringBuilder(8)
-    ieee.pack_float(result, f, 8, False)
-    return result.build()
+    buf = MutableStringBuffer(8)
+    ieee.pack_float(buf, 0, f, 8, False)
+    return buf.finish()
 
 def unpack_float(s):
     return ieee.unpack_float(s, False)