`printf` strangeness (GIT8266O-894)

[Fabizocker456]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occur?

always

Expected behavior

I expected there to be a way to print a uint64_t in hexadecimal using the <stdio.h> function printf.
GCC refuses to compile if I do not use the %llx format specifier, as in printf("%llx\n", the_integer_variable).
Similarly, I should be able to use the PRIx64 macro from <inttypes.h> like printf("%" PRIx64 "\n", the_integer_variable). This macro appears to expand to the same string.

Actual behavior (suspected bug)

Attempting to use %llx as a format specified will print lx verbatim.
It also seems to somehow corrupt the argument list: printf("%llx %d", <a uint64_t variable of value 100 (decimal)>, 5) prints lx 1073652028.

Error logs or terminal output

(n/a)

Steps to reproduce the behavior

• Create a project (e.g. by copying an example)
• Add the necessary header files
• Declare and initialize a variable of type uint64_t
• Attempt to use that variable as a parameter to printf

Project release version

latest master (858c7c2)

System architecture

Intel/AMD 64-bit (modern PC, older Mac)

Operating system

Linux

Operating system version

Debian 12 (bookworm)

Shell

Bash

Additional context

I'd assume this to be a problem with the libc used, I would not know where to open an issue for that if not here.