pear-base can't update/install

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I have installed pear-base port and here is the log for it:

bash-3.2# port install pear-base ---> Fetching pear-base ---> Verifying checksum(s) for pear-base ---> Extracting pear-base ---> Configuring pear-base ---> Building pear-base with target all ---> Staging pear-base into destroot ---> Installing pear-base 1.6.2_0 ---> Activating pear-base 1.6.2_0 ---> Cleaning pear-base bash-3.2# pear list (no packages installed from channel pear.php.net) bash-3.2# pear install DB WARNING: "pear/DB" is deprecated in favor of "pear/MDB2" WARNING: channel "pear.php.net" has updated its protocols, use "channel-update pear.php.net" to update Did not download optional dependencies: pear/XML_RPC, use --alldeps to download automatically pear/PEAR can optionally use package "pear/XML_RPC" (version >= 1.4.0) downloading DB-1.7.13.tgz ... Starting to download DB-1.7.13.tgz (132,246 bytes) .....................done: 132,246 bytes downloading PEAR-1.6.2.tgz ... Starting to download PEAR-1.6.2.tgz (297,794 bytes) ...done: 297,794 bytes downloading Archive_Tar-1.3.2.tgz ... Starting to download Archive_Tar-1.3.2.tgz (17,150 bytes) ...done: 17,150 bytes downloading Structures_Graph-1.0.2.tgz ... Starting to download Structures_Graph-1.0.2.tgz (30,947 bytes) ...done: 30,947 bytes downloading Console_Getopt-1.2.3.tgz ... Starting to download Console_Getopt-1.2.3.tgz (4,011 bytes) ...done: 4,011 bytes

Warning: PEAR_Downloader::require_once(Structures/Graph.php): failed to open stream: No such file or directory in Downloader.php on line 1230 PHP Warning: PEAR_Downloader::require_once(Structures/Graph.php): failed to open stream: No such file or directory in /opt/local/lib/php/PEAR/Downloader.php on line 1230 PHP Fatal error: PEAR_Downloader::require_once(): Failed opening required 'Structures/Graph.php' (include_path='/opt/local/lib/php') in /opt/local/lib/php/PEAR/Downloader.php on line 1230

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Problem is I cannot install any pear packages because of the above error. Is this an upstream problem or something wrong with the setup of pear-base port?