core_esp8266_features.h

[TjayAmit]

This issue is regard on your latest updates 2 days ago, before that update everything is Okay.

In file included from c:\Users\abieg\OneDrive\Documents\Arduino\libraries\WebSockets\src\libb64\cdecode.c:9:
C:\Users\abieg\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.0\cores\esp8266/core_esp8266_features.h:141:42: error: expected ',' or ';' before 'esp_is_8285'
  141 |     bool __attribute__((const, nothrow)) esp_is_8285();
      |                                          ^~~~~~~~~~~
C:\Users\abieg\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.0\cores\esp8266/core_esp8266_features.h:148:1: error: expected identifier or '(' before '}' token
  148 | }
      | ^
In file included from c:\Users\abieg\OneDrive\Documents\Arduino\libraries\WebSockets\src\libb64\cencode.c:9:
C:\Users\abieg\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.0\cores\esp8266/core_esp8266_features.h:141:42: error: expected ',' or ';' before 'esp_is_8285'
  141 |     bool __attribute__((const, nothrow)) esp_is_8285();
      |                                          ^~~~~~~~~~~
C:\Users\abieg\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.0\cores\esp8266/core_esp8266_features.h:148:1: error: expected identifier or '(' before '}' token
  148 | }
      | ^

exit status 1

Compilation error: exit status 1

[d-a-v]

This issue seems like an installation error.
Line number is not matching, and this code passes all CI tests.

https://github.com/esp8266/Arduino/blob/3.1.0/cores/esp8266/core_esp8266_features.h#L132

Can you try and reinstall the complete core for example by first removing it from the Arduino15 directory from Appdata ?