Why does INCBIN`d var throw an error when accessed? - c++

Question

VSCode, PlatformIO
ESP8266 nodeMCU v3.0
PIO`s INCBIN lib https://github.com/AlexIII/incbin-arduino?utm_source=platformio&utm_medium=piohome
I load by INCBIN lib one file to ESP8266.
I try to print first datum.
#include "Arduino.h"
#include "incbin.h"
INCBIN(my, "path/to/file.someExtension");
void setup()
{
Serial.begin(9600);
Serial.println();
Serial.println(*gmyData)
}
void loop(){}
monitor out
Exception (3):
epc1=0x40201098 epc2=0x00000000 epc3=0x00000000 excvaddr=0x40238b14 depc=0x00000000
LoadStoreError: Processor internal physical address or data error during load or store
epc1=0x40201098 in setup at ??:?
excvaddr=0x40238b14 in ethernet_input at ??:?
>>>stack>>>
ctx: cont
sp: 3ffffe00 end: 3fffffc0 offset: 0190
3fffff90: 3fffdad0 00000000 3ffee534 40201093
3fffffa0: feefeffe feefeffe 3ffee66c 40201e00
3fffffb0: feefeffe feefeffe 3ffe85d8 40100cc1
<<<stack<<<
0x40201093 in setup at ??:?
0x40201e00 in loop_wrapper() at core_esp8266_main.cpp:?
0x40100cc1 in cont_wrapper at ??:?
This also throws error.
uint8_t datum = *gmyData;
Serial.println(datum);
edit
Tests show that Serial.println() is not guilty. It's all about incbin'd var access.
test, which throws aforementioned exception:
int i;
if (*gmyData > 0)
i = 1;
else
i = 2;
Serial.println(i);
File is a "primary" certificate gtsltsr.crt from point 1.b from https://cloud.google.com/iot/docs/how-tos/mqtt-bridge#using_a_long-term_mqtt_domain
I tried to read first byte in main code sample just to check correctness.