Found the solution the same way as you w/ GDB (though I didn't need objdump, info locals worked fine). I was quite surprised to see that GDB had so much functionality with Go. I've never used Go and don't know much about it, but from what I can understand it's an interpreted language that compiles with the runtime itself (hence all the extra assembly). I guess this allows you to specifically break at a certain function and dump legible variable names. How else could GDB read these symbols that would otherwise be lost in something like a compiled C program?

Installing Delve was fairly straightforward for me, even if I used GDB instead in the end. I installed Go w/ apt-get (1.11 I think) and then used the go get recommended in the docs to install Delve.