I got this error from portage when running emerge sync. It said it was a bug and to report it, so that's what I'm doing : <snip> Total bytes read: 88516320 wrote 1488461 bytes read 88516320 bytes 201128.00 bytes/sec total size is 109509751 speedup is 1.22 >>>>>> Updating Portage cache: 90%!!! Cannot resolve a virtual package name to an ebuild. !!! This is a bug, please report it. (virtual/libstdc++-3.3)
*** This bug has been marked as a duplicate of 114798 ***