[PATCH v2] libstdc++: Improve ostream output for std::stacktrace

[Jonathan Wakely]

On Thu, 16 Oct 2025 at 15:04, Antony Polukhin wrote:
>
> > Maybe we could put the hex address at the front, and then pad it
>
> It has a readability downside. The output is for consuming by humans, and for humans the most valuable part is the function name. If the function name does not help, then the source file name with the line do the job. Putting address at the beginning of the output forces the user to look through the output line and mentally skip the address, which is not hard but causes minor inconvenience.
>
> Addresses in GDB have value, because in GDB you could jump to the address. While outputting std::stacktrace the debugger is rarely present, so the address has less value.

Thanks for sharing your thoughts. I was inspired by the
Boost.Stacktrace output, because I figured you'd already considered
this. That's why I made it print "1#" instead of "#1" for example,
although I'm still undecided about that :-)