diff -r 2b9141b01023 -r 56f7e5b0243c src/BytecodeEmitter.cpp
--- a/src/BytecodeEmitter.cpp	Sat Sep 01 17:11:06 2012 -0700
+++ b/src/BytecodeEmitter.cpp	Sun Sep 02 13:06:09 2012 -0700
@@ -17,6 +17,7 @@
  * JITCraft. If not, see http://www.gnu.org/licenses/.
  */
 #include <stdlib.h>
+#include <string.h>
 #include "BytecodeEmitter.h"
 #include "Utility.h"
 #include "Types.h"
@@ -56,7 +57,7 @@
 
     bytecode *newBuffer;
     if (buffer_ == inline_buffer_)
-        newBuffer = (bytecode *)malloc(nbytes);
+        newBuffer = (bytecode *)malloc(newSize);
     else
         newBuffer = (bytecode *)realloc(buffer_, newSize);
 
@@ -69,9 +70,14 @@
         return false;
     }
 
+    if (buffer_ == inline_buffer_)
+        memcpy(newBuffer, inline_buffer_, (buffer_pos_ - inline_buffer_));
+
     buffer_pos_ = newBuffer + size_t(buffer_pos_ - buffer_);
     buffer_ = newBuffer;
     buffer_end_ = buffer_ + newSize;
+    assert(buffer_pos_ + nbytes < buffer_end_);
+
     return true;
 }