> Brian's 1979 "still" is a whole world away... Indeed. In 1979, the debugger in Version 7 Unix, called "adb", was quite primitive by today's standards. For ex

> Brian's 1979 "still" is a whole world away... Indeed. In 1979, the debugger in Version 7 Unix, called "adb", was quite primitive by today's standards. For example, you couldn't even set a breakpoint at a specific line of a C function, only at the function's entry point. For the "adb" documentation, see Volume 2A of the Unix Version 7 doc: https://plan9.io/7thEdMan/v7vol2a.pdf https://plan9.io/7thEdMan/v7vol2a.pdf On page 314 it says: "C does not generate statement labels. Therefore it is currently not possible to plant breakpoints at locations other than function entry points without a knowledge of the code generated by the C compiler." I.e., you'd have to delve into the machine code to find the address of the first machine instruction of your C statement if you wanted to put a breakpoint there. Debuggers have come a long way since then.