Bug in strptime?

[rubbah]

Info:
ESP32-C6
ESP-IDF v5.5 (master branch of https://github.com/espressif/esp-idf)


I'm trying to read a string in format "(YYMMDDhhmmssX)"

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#include <time.h>
char* X = NULL;    
struct tm tm;

const char* str_data = "(250111163740W)";
X = strptime(str_data , "(%y%m%d%H%M%S", &tm);
ESP_LOGI(TEST_TAG, "X is: %p\r\n", X);

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TEST: X is: 0x0

X is still NULL (0x0) but it should point to the character W which it doesn't.
Am I miss interpreting how strptime should work?

Tried just compiling a program with gcc.

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#define _GNU_SOURCE
#include <stdio.h>
#include <time.h>

int main()
{
    struct tm tm;
    char *X = NULL;

    const char* str_data = "(250111163740W)";
    X = strptime(str_data, "(%y%m%d%H%M%S", &tm);

    printf("X is: %c, X value: %p\r\n", *X, X);

    return 0;
}

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X is: W, X value: 0x555ddc8d3011