X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c4825ef73a5f190b8f39c59df098c3f39fa4464b..6f8dd114f41f0cfdf3670267e88f7dea1da18f5a:/src/osx/carbon/textctrl.cpp?ds=sidebyside

diff --git a/src/osx/carbon/textctrl.cpp b/src/osx/carbon/textctrl.cpp
index f385f45e06..8ae1c6b43f 100644
--- a/src/osx/carbon/textctrl.cpp
+++ b/src/osx/carbon/textctrl.cpp
@@ -1371,8 +1371,10 @@ void wxMacMLTEControl::SetTXNData( const wxString& st, TXNOffset start, TXNOffse
 #else
     wxMBConvUTF16 converter ;
     ByteCount byteBufferLen = converter.WC2MB( NULL, st.wc_str(), 0 ) ;
-    UniChar *unibuf = (UniChar*)malloc( byteBufferLen ) ;
-    converter.WC2MB( (char*)unibuf, st.wc_str(), byteBufferLen ) ;
+    wxASSERT_MSG( byteBufferLen != wxCONV_FAILED,
+                  _T("Conversion to UTF-16 unexpectedly failed") );
+    UniChar *unibuf = (UniChar*)malloc( byteBufferLen + 2 ) ; // 2 for NUL in UTF-16
+    converter.WC2MB( (char*)unibuf, st.wc_str(), byteBufferLen + 2 ) ;
     TXNSetData( m_txn, kTXNUnicodeTextData, (void*)unibuf, byteBufferLen, start, end ) ;
     free( unibuf ) ;
 #endif