Hi!
Moving my project from mysql-lited to mysql-native I faced the
problem with null pointer error inside of mysql-native:
Log:
SELECT id FROM versionupdate ORDER BY id
Task terminated with unhandled exception:
etc.linux.memoryerror.NullPointerError@src/etc/linux/memoryerror.d(325)
----------------
??:? void etc.linux.memoryerror.sigsegvUserspaceProcess(void*)
[0x102ebad]
??:? void etc.linux.memoryerror.sigsegvDataHandler() [0x102eaee]
../../.dub/packages/mysql-native-1.1.0/mysql-native/source/mysql/result.d:466
const(pure nothrow @property bool function()) mysql.result.ResultRange.isValid
[0xdf1626]
../../.dub/packages/mysql-native-1.1.0/mysql-native/source/mysql/result.d:536
void mysql.result.ResultRange.close() [0xdf1cb8]
../../.dub/packages/mysql-native-1.1.0/mysql-native/source/mysql/result.d:460
void mysql.result.ResultRange.__dtor() [0xdf15cc]
../../.dub/packages/mysql-native-1.1.0/mysql-native/source/mysql/result.d:430
ref return mysql.result.ResultRange
mysql.result.ResultRange.opAssign(mysql.result.ResultRange) [0xdf1dba]
source/vcm/sqlWrapper.d:63 mysql.result.ResultRange
vcm.sqlWrapper.SqlWrapper.query!().query(immutable(char)[])
[0xdd57e3]
source/updater/manager.d:92 void
updater.manager.UpdateManager.update() [0xd74886]
source/app.d:81 void app.prepareDb().__lambda1() [0xcfe740]
../../.dub/packages/vibe-d-0.7.31/vibe-d/source/vibe/core/core.d:595 void
vibe.core.core.makeTaskFuncInfo!(void delegate()).makeTaskFuncInfo(ref void
delegate()).callDelegate(vibe.core.core.TaskFuncInfo*) [0xc5b703]
../../.dub/packages/vibe-d-0.7.31/vibe-d/source/vibe/core/core.d:1224 void
vibe.core.core.CoreTask.run() [0xf6a916]
??:? void core.thread.Fiber.run() [0x107f17b]
??:? fiber_entryPoint [0x107eede]
??:? [0xffffffff]
Code fragment:
string s = Sql(sqlString, args).toString!MysqlDialect;
writeln(s);stdout.flush; // debugging...
if(conn.__conn() is null) // debugging...
throw new Exception("connection is null");
ResultRange result;
// synchronized (mutex)
result = conn.query(s); // <-- sqlWrapper.d:63 is here
It seems I am doing something wrong so myself-native fails to
detect it in isValid(). So I search for example how to use
mysql-native in real multi-threaded vibe.d application with usage
of MySQLPool. Please do not point me to basic example provided
with package because it is single thread.
Thanks.
