[Vala] CRITICAL **: vala_ccode_fragment_append: assertion `VALA_IS_CCODE_FRAGMENT (self)' failed

[Alexey Lubimov <avl l14 ru>]

What is this? How to discover problem?

vala from svn.

vala-0.3.5-2svn20080823.fc9.i386


valac -q -o swim --pkg=gee-1.0 --pkg=gtk+-2.0 --pkg=libglade-2.0 
--pkg=sqlite3 --thread Main.vala Windows/Login.vala 
Windows/GladeWindow.vala Windows/WinMain.vala DB/DBUser.vala 
DB/SqliteDB.vala Info/UserInfo.vala Info/LogEvent.vala DB/DBLog.vala 
Const.vala Windows/WinInfoMessage.vala Windows/WinQuestionMessage.vala 
Windows/WinAbout.vala Windows/WinList.vala Windows/WinOrgList.vala 
Windows/WinPersonList.vala Info/WindowState.vala Info/GenericInfo.vala 
Info/OrgInfo.vala Info/PersonInfo.vala Info/GenericList.vala 
Windows/TreeFolders.vala DB/DBPersonRoleType.vala 
Windows/ListPerson.vala DB/DBPerson.vala Info/DateInfo.vala 
Windows/WinPersonEdit.vala Info/PersonRoleTypeInfo.vala 
Info/PersonRoleTypeList.vala Windows/WinCalendar.vala 
Info/ContactList.vala Windows/WinContactEdit.vala 
Windows/GladeDialog.vala Windows/GladeWindowStatic.vala 
Info/ContactInfo.vala DB/DBContactType.vala Info/ContactTypeInfo.vala 
Info/ContactTypeList.vala Info/GenericListStore.vala 
Info/TreeViewColumnInfo.vala Info/TreeViewColumnList.vala 
Info/ContactColumnList.vala

** (valac:13831): CRITICAL **: vala_ccode_fragment_append: assertion 
`VALA_IS_CCODE_FRAGMENT (self)' failed
** (valac:13831): CRITICAL **: vala_ccode_fragment_append: assertion 
`VALA_IS_CCODE_FRAGMENT (self)' failed
** (valac:13831): CRITICAL **: vala_ccode_fragment_append: assertion 
`VALA_IS_CCODE_FRAGMENT (self)' failed
** (valac:13831): CRITICAL **: vala_ccode_fragment_append: assertion 
`VALA_IS_CCODE_FRAGMENT (self)' failed
** (valac:13831): CRITICAL **: vala_ccode_fragment_append: assertion 
`VALA_IS_CCODE_FRAGMENT (self)' failed
** (valac:13831): CRITICAL **: vala_ccode_fragment_append: assertion 
`VALA_IS_CCODE_FRAGMENT (self)' failed