In CommandCompletion.h:243
if (resolved_username_len = 0 || resolved_username_len >= sizeof (containing_part))
should be
if (resolved_username_len == 0 || resolved_username_len >= sizeof (containing_part))
That's why you should compile with -Wparenthese 
hum.patch (693 Bytes)
Revision: 107671
Jean-Daniel Dupas patch that fixes a bad if statement with assignment.
Changes:
  M /lldb/trunk/source/Commands/CommandCompletions.cpp
I also updated the Xcode projects to include "-Wparentheses" in the CFLAGS:
Sending lldb.xcodeproj/project.pbxproj
Sending tools/debugserver/debugserver.xcodeproj/project.pbxproj
Transmitting file data ..
Committed revision 107672.