error: inlining failed in call to 'always_inline'

Created by: lbussy

I'm getting this error in an application that used to compile without issue on an older ArduinoJson 6.x version.

ArduinoJson Troubleshooter's report

The issue happens at compile time
The error is not in the list

In file included from .pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
                 from .pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
                 from .pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson.hpp:17,
                 from .pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson.h:9,
                 from src\jsonconfig.h:27,
                 from src\jsonconfig.cpp:23:
.pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp: In member function 'typename ArduinoJson6180_D1::enable_if<((! ArduinoJson6180_D1::is_same<T, char*>::value) && (! ArduinoJson6180_D1::is_same<T, char>::value)), T>::type ArduinoJson6180_D1::VariantConstRef::as() const [with T = ArduinoJson6180_D1::VariantRef]':
.pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:295:16: error: inlining failed in call to 'always_inline' 'ArduinoJson6180_D1::VariantConstRef::operator T() const [with T = ArduinoJson6180_D1::VariantRef]': function not inlinable
  295 |   FORCE_INLINE operator T() const {
      |                ^~~~~~~~
.pio\libdeps\d1_mini\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:253:34: note: called from here
  253 |     return Converter<T>::fromJson(*this);
      |            ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
Compiling .pio\build\d1_mini\src\uptime.cpp.o
*** [.pio\build\d1_mini\src\jsonconfig.cpp.o] Error 1

I'm more than happy to try to refine the issue, create a small fail case, etc., however, to rip it all out and re-write it would sort of remove any advantage your experience might bring. :)

If this error rings a bell with you, great! If not, I'll start commenting out swaths of code to figure out where I'm going sideways.

Updating bblanchon/ArduinoJson                6.18.0                             [Up-to-date]

Platform espressif8266
--------
Updating platformio/espressif8266             3.0.0                              [Up-to-date]
Updating platformio/toolchain-xtensa          2.100200.0 @ ~2.100200.0           [Up-to-date]
Updating platformio/framework-arduinoespressif8266 3.30000.210519 @ ~3.30000.0        [Up-to-date]