No undeleted object detection in MQL5, but MQL4 has

Yes, I'm aware of that. But MQL4 shows a warning when I have forgotten to do that, but MQL5 does not. I would like to see that warning also in MQL5 :)

Oddly enough this is all I see when the tester terminates and no reference to undelete objects.

HH    0    18:30:12.084    127.0.0.1    login (build 3360)
JL    0    18:30:12.091    Tester    account info found with currency USD
MF    0    18:30:12.095    Tester    expert file added: Experts\Trendy\Trendy.ex5. 194257 bytes loaded
DQ    0    18:30:12.110    Tester    initial deposit 10000.00 USD, leverage 1:500
KJ    0    18:30:12.110    Tester    successfully initialized
LP    0    18:30:12.110    Network    185 Kb of total initialization data received
FK    0    18:30:12.110    Tester    Intel Core i7-9750H  @ 2.60GHz, 32495 MB
GR    0    18:30:12.111    Symbols    XAUUSD: symbol to be synchronized
NH    0    18:30:12.111    Symbols    XAUUSD: symbol synchronized already, 18 bytes received
QM    0    18:30:12.113    History    XAUUSD: load 27 bytes of history data to synchronize in 0:00:00.000
HR    0    18:30:12.113    History    XAUUSD: history synchronized from 2021.01.04 to 2022.07.15
EH    0    18:30:12.195    History    XAUUSD,M1: history cache allocated for 554043 bars and contains 352314 bars from 2021.01.04 01:02 to 2021.12.31 20:59
CK    0    18:30:12.195    History    XAUUSD,M1: history begins from 2021.01.04 01:02
QG    0    18:30:12.197    Tester    XAUUSD,M1 (ICMarketsSC-Demo): every tick generating
NP    0    18:30:12.197    Tester    XAUUSD,M1: testing of Experts\Trendy\Trendy.ex5 from 2022.01.01 00:00 to 2022.07.16 00:00 started with inputs:
RO    0    18:30:12.266    History    XAUUSD,M5: history cache allocated for 111022 bars and contains 70676 bars from 2021.01.04 01:00 to 2021.12.31 20:55
RO    0    18:30:12.266    History    XAUUSD,M5: history begins from 2021.01.04 01:00
HE    0    18:30:12.267    Tester    program file added: \Indicators\donchian_channels.ex5. 11723 bytes loaded
RI    0    18:30:12.997    Trade    2022.01.03 02:14:32   market buy 0.01 XAUUSD (1827.48 / 1827.57 / 1827.48)
JS    0    18:30:12.997    Trades    2022.01.03 02:14:32   deal #2 buy 0.01 XAUUSD at 1827.57 done (based on order #2)
GN    0    18:30:12.997    Trade    2022.01.03 02:14:32   deal performed [#2 buy 0.01 XAUUSD at 1827.57]
IH    0    18:30:12.997    Trade    2022.01.03 02:14:32   order performed buy 0.01 at 1827.57 [#2 buy 0.01 XAUUSD at 1827.57]
DJ    0    18:30:13.208    Trade    2022.01.03 20:36:38   market sell 0.01 XAUUSD (1801.12 / 1801.15 / 1801.12)
CH    0    18:30:13.208    Trades    2022.01.03 20:36:38   deal #3 sell 0.01 XAUUSD at 1801.12 done (based on order #3)
CJ    0    18:30:13.208    Trade    2022.01.03 20:36:38   deal performed [#3 sell 0.01 XAUUSD at 1801.12]
LS    0    18:30:13.208    Trade    2022.01.03 20:36:38   order performed sell 0.01 at 1801.12 [#3 sell 0.01 XAUUSD at 1801.12]
JO    0    18:31:00.658    Trade    2022.07.15 23:56:59   position closed due end of test at 1707.64 [#3 sell 0.01 XAUUSD 1801.12]
FL    0    18:31:00.658    Trades    2022.07.15 23:56:59   deal #4 buy 0.01 XAUUSD at 1707.64 done (based on order #4)
IJ    0    18:31:00.658    Trade    2022.07.15 23:56:59   deal performed [#4 buy 0.01 XAUUSD at 1707.64]
DE    0    18:31:00.658    Trade    2022.07.15 23:56:59   order performed buy 0.01 at 1707.64 [#4 buy 0.01 XAUUSD at 1707.64]
IK    0    18:31:00.658    Trade    2022.07.15 23:56:59   position closed due end of test at 1707.32 [#2 buy 0.01 XAUUSD 1827.57]
DJ    0    18:31:00.659    Trades    2022.07.15 23:56:59   deal #5 sell 0.01 XAUUSD at 1707.32 done (based on order #5)
FO    0    18:31:00.659    Trade    2022.07.15 23:56:59   deal performed [#5 sell 0.01 XAUUSD at 1707.32]
HN    0    18:31:00.659    Trade    2022.07.15 23:56:59   order performed sell 0.01 at 1707.32 [#5 sell 0.01 XAUUSD at 1707.32]
OO    0    18:31:00.659    Tester    final balance 9971.69 USD
KS    0    18:31:00.664    Tester    XAUUSD,M1: 12628679 ticks, 190471 bars generated. Environment synchronized in 0:00:00.027. Test passed in 0:00:48.552 (including ticks preprocessing 0:00:00.531).
PD    0    18:31:00.664    Tester    XAUUSD,M1: total time from login to stop testing 0:00:48.579 (including 0:00:00.027 for history data synchronization)
NS    0    18:31:00.664    Tester    533 Mb memory used including 38 Mb of history data, 256 Mb of tick data
OE    0    18:31:00.664    Tester    log file "C:\Users\hendr\AppData\Roaming\MetaQuotes\Tester\D0E8209F77C8CF37AD8BF550E51FF075\Agent-127.0.0.1-3000\logs\20220803.log" written
CR    0    18:31:00.664        test Experts\Trendy\Trendy.ex5 on XAUUSD,M1 thread finished
II    0    18:31:00.858    127.0.0.1    prepare for shutdown

So there is no undeleted objects.

But if you can't believe that. build you class like that

#include <Arrays/ArrayObj.mqh>
class MyObject : public CObject
  {
   static CArrayObj  my_objects;
public:
                     MyObject(void) {my_objects.Add(GetPointer(this));}
                    ~MyObject(void) {my_objects.Delete(my_objects.Search(GetPointer(this)));}
                     
   static void       Clear(void) {my_objects.Clear();}
  };
CArrayObj MyObject::my_objects;

then you call MyObject::Clear() in OnDeinit.