diff -Nur chasen-2.4.0-preview1.orig/lib/dartsdic.cpp chasen-2.4.0-preview1/lib/dartsdic.cpp
--- chasen-2.4.0-preview1.orig/lib/dartsdic.cpp	2004-11-30 21:04:27.831907064 +0900
+++ chasen-2.4.0-preview1/lib/dartsdic.cpp	2004-11-30 21:05:18.430936704 +0900
@@ -184,7 +184,7 @@
 	    lex_indices.push_back(i->second);
 	}
 	lens[size] = key.size();
-	(const char*)keys[size] = key.data();
+	keys[size] = (char*)key.data();
 	vals[size] = redump_lex(lens[size], lex_indices, tmpfile, lexfile);
 	if (vals[size] < 0) {
 	    std::cerr << "Unexpected error at " << key << std::endl;