Merge pull request #500 from sparklemotion/flavorjones-fix-expanded-sql-leak

fix: expanded sql leak

Author: flavorjones

ext/sqlite3/exception.c

@@ -102,16 +102,16 @@ rb_sqlite3_raise(sqlite3 *db, int status)
  *  accepts a sqlite3 error message as the final argument, which will be `sqlite3_free`d
  */
 void
-rb_sqlite3_raise_msg(sqlite3 *db, int status, const char* msg)
+rb_sqlite3_raise_msg(sqlite3 *db, int status, const char *msg)
 {
-  VALUE exception;
+    VALUE exception;
 
-  if (status == SQLITE_OK) {
-    return;
-  }
+    if (status == SQLITE_OK) {
+        return;
+    }
 
-  exception = rb_exc_new2(rb_path2class("SQLite3::Exception"), msg);
-  sqlite3_free((void*)msg);
-  rb_iv_set(exception, "@code", INT2FIX(status));
-  rb_exc_raise(exception);
+    exception = rb_exc_new2(rb_path2class("SQLite3::Exception"), msg);
+    sqlite3_free((void *)msg);
+    rb_iv_set(exception, "@code", INT2FIX(status));
+    rb_exc_raise(exception);
 }

ext/sqlite3/exception.h

@@ -5,6 +5,6 @@
 #define CHECK_MSG(_db, _status, _msg) rb_sqlite3_raise_msg(_db, _status, _msg);
 
 void rb_sqlite3_raise(sqlite3 *db, int status);
-void rb_sqlite3_raise_msg(sqlite3 *db, int status, const char* msg);
+void rb_sqlite3_raise_msg(sqlite3 *db, int status, const char *msg);
 
 #endif

ext/sqlite3/statement.c

@@ -622,10 +622,17 @@ static VALUE
 get_expanded_sql(VALUE self)
 {
     sqlite3StmtRubyPtr ctx;
+    char *expanded_sql;
+    VALUE rb_expanded_sql;
+
     TypedData_Get_Struct(self, sqlite3StmtRuby, &statement_type, ctx);
     REQUIRE_OPEN_STMT(ctx);
 
-    return rb_obj_freeze(SQLITE3_UTF8_STR_NEW2(sqlite3_expanded_sql(ctx->st)));
+    expanded_sql = sqlite3_expanded_sql(ctx->st);
+    rb_expanded_sql = rb_obj_freeze(SQLITE3_UTF8_STR_NEW2(expanded_sql));
+    sqlite3_free(expanded_sql);
+
+    return rb_expanded_sql;
 }
 
 void