Crash when using `FunctionalInterrupt.h` handler

### Basic Infos

- [x] This issue complies with the [issue POLICY doc](https://github.com/esp8266/Arduino/blob/master/POLICY.md).
- [x] I have read the documentation at [readthedocs](https://arduino-esp8266.readthedocs.io/en/latest) and the issue is not addressed there.
- [ ] I have tested that the issue is present in current master branch (aka latest git).
- [x] I have searched the issue tracker for a similar issue.
- [x] If there is a stack dump, I have decoded it.
- [x] I have filled out all fields below.

#### Platform

- Hardware: ESP-01, but it can also be reproduced on other devices (e.g. ESP-12)
- Core Version: 3.1.1
- Development Env: Sloeber IDE, but it can also be reproduced with the Arduino IDE
- Operating System: [Windows|Ubuntu|MacOS]

### Settings in IDE

- Module: Generic ESP8266 Module
- Flash Mode: DOUT
- Flash Size: 1 MB
- lwip Variant: v2 Lower Memory
- Reset Method: dtr
- Flash Frequency: 40Mhz
- CPU Frequency: 80Mhz
- Upload Using: SERIAL
- Upload Speed: 921600

### Problem Description

If I use an interrupt handler that triggers frequently, the program will crash after some time. When the ESP resets after the exception, Wifi connection can no longer be established.

To reproduce, I connected an oscillator to the port where the interrupt is attached. I use GPIO 2 in this example which is available on an ESP01, but I could reproduce it with different ports, for example GPIO 3 (AKA serial RXD), or on an ESP12 with GPIO 5. I run the oscillator at about 20 Hz. The problem also occurs at lower frequencies, but it might take more time.

### [MCVE](https://stackoverflow.com/help/mcve) Sketch

```cpp
#include
#include
#include

unsigned long lastPrint = 0;
volatile unsigned counter = 0;

void setup() {
Serial.begin(115200);
WiFi.begin("", ""); // fill with real values
attachInterrupt(2, [&]() { ++counter; }, RISING);
}

void loop() {
auto now = millis();
if (now - lastPrint > 1000) {
Serial.println(now);
Serial.println(WiFi.status());
Serial.println(counter);
lastPrint = now;
}
delay(1);
}
```

### Stack Trace

```
Exception 0: Illegal instruction
PC: 0x40201020
EXCVADDR: 0x00000000

Decoding stack results
0x40100630: interrupt_handler(void*, void*) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/core_esp8266_wiring_digital.cpp line 167
0x40100f06: check_poison_block(umm_block*) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/umm_malloc/umm_poison.c line 86
0x401014d6: umm_poison_calloc(size_t, size_t) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/umm_malloc/umm_poison.c line 189
0x4010056c: interrupt_handler(void*, void*) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/core_esp8266_wiring_digital.cpp line 138
0x40100f06: check_poison_block(umm_block*) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/umm_malloc/umm_poison.c line 86
0x40100f06: check_poison_block(umm_block*) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/umm_malloc/umm_poison.c line 86
0x40101160: umm_malloc_core(umm_heap_context_t*, size_t) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/umm_malloc/umm_local.c line 47
0x401003d0: ets_post(uint8, ETSSignal, ETSParam) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/core_esp8266_main.cpp line 238
0x40101490: umm_malloc(size_t) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/umm_malloc/umm_malloc.cpp line 912
0x40212b9d: sys_timeout_abs at core/timeouts.c line 189
0x401003d0: ets_post(uint8, ETSSignal, ETSParam) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/core_esp8266_main.cpp line 238
0x4020346a: loop_task(ETSEvent*) at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/core_esp8266_main.cpp line 273
0x40100094: app_entry() at /home/petersohn/eclipse/Sloeber/arduinoPlugin/packages/esp8266/hardware/esp8266/3.1.1/cores/esp8266/core_esp8266_main.cpp line 392
```

### Debug Messages

The program runs fine for about 10 minutes on my scenario (it's random, and occurs earlier if the oscillator runs at higher frequency). Then I get an exception (stack trace above).

```
Fatal exception 0(IllegalInstructionCause):
epc1=0x40201020, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
```

Then the ESP reboots, but the Wifi connection cannot be established.

```
scandone
no found, reconnect after 1s
wifi evt: 1
STA disconnect: 201
reconnect
```