gdb: how to print the current line or find the current line number?

Question

list commands prints a set of lines, but I need one single line, where I am and where an error has probably occurred.

Answer 1

I do get the same information while debugging. Though not while I am checking the stacktrace. Most probably you would have used the optimization flag I think. Check this link - something related.

Try compiling with -g3 remove any optimization flag. Then it might work. HTH!