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今日 84 | 昨日 173 | 合計 1310008


2007-05-22

_ MeCabのバグ

全文検索アプリをWindowsでも動作するようにしたが、なぜかinsert中にたまにPostgreSQLが落ちてしまうことがあった。

原因を調べてみると、分かち書きにMeCabを使用したPostgreSQLのモジュールを用いており、MeCab内で落ちていることが判明。

mecab_sparse_tonode() で落ちていることが分かったのでソースを追っかけてみると、strncpy()を多用しており、もしかしたらどこかでヌルターミネートの扱いをミスっているのではないかと試しに mecab_sparse_tonode2(mecab, str, strlen(str) + 1) のように長さを1バイト多く渡してみるとクラッシュしなくなった。

C++で書かれていることもあって、具体的にどこに問題があるのかまでは追いきれなかった。

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