X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a4fec5b41e2109e2c4822d3015aa0e442754bfbb..803e2857b35d86afe9dfa6ceec56ed88b903aed5:/src/osx/carbon/stattext.cpp

diff --git a/src/osx/carbon/stattext.cpp b/src/osx/carbon/stattext.cpp
index 14b10a3812..90765430e8 100644
--- a/src/osx/carbon/stattext.cpp
+++ b/src/osx/carbon/stattext.cpp
@@ -65,14 +65,21 @@ wxSize wxStaticText::DoGetBestSize() const
         OSStatus err = m_peer->GetData<ControlFontStyleRec>( kControlEntireControl, kControlFontStyleTag, &controlFont );
         verify_noerr( err );
 
-        wxCFStringRef str( m_label,  GetFont().GetEncoding() );
-
 #if wxOSX_USE_ATSU_TEXT
         SInt16 baseline;
         if ( m_font.MacGetThemeFontID() != kThemeCurrentPortFont )
         {
+            // GetThemeTextDimensions will cache strings and the documentation
+            // says not to use the NoCopy string creation calls.
+            // This also means that we can't use CFSTR without
+            // -fno-constant-cfstrings if the library might be unloaded,
+            // as GetThemeTextDimensions may cache a pointer to our
+            // unloaded segment.
+            wxCFStringRef str( !m_label.empty() ? m_label : wxString(" "),
+                              GetFont().GetEncoding() );
+
             err = GetThemeTextDimensions(
-                (!m_label.empty() ? (CFStringRef)str : CFSTR(" ")),
+                (CFStringRef)str,
                 m_font.MacGetThemeFontID(), kThemeStateActive, false, &bounds, &baseline );
             verify_noerr( err );
         }