As per review, __detachInterrupt() shall be in ICACHE_RAM.

dok-net · dok-net · commit 6710a3c882b3 · 2020-10-22T19:12:14.000+02:00
diff --git a/cores/esp8266/core_esp8266_wiring_digital.cpp b/cores/esp8266/core_esp8266_wiring_digital.cpp
@@ -176,7 +176,7 @@ extern void __attachInterrupt(uint8_t pin, voidFuncPtr userFunc, int mode)
     }, mode);
 }
 
-extern void __detachInterrupt(uint8_t pin)
+extern void ICACHE_RAM_ATTR __detachInterrupt(uint8_t pin)
 {
   if (pin < 16)
   {

Original file line number	Diff line number	Diff line change
`@@ -176,7 +176,7 @@ extern void __attachInterrupt(uint8_t pin, voidFuncPtr userFunc, int mode)`
`176`	`176`	`}, mode);`
`177`	`177`	`}`
`178`	`178`
`179`		`-extern void __detachInterrupt(uint8_t pin)`
	`179`	`+extern void ICACHE_RAM_ATTR __detachInterrupt(uint8_t pin)`
`180`	`180`	`{`
`181`	`181`	`if (pin < 16)`
`182`	`182`	`{`