Comment by Pawamoy

I'll get a closer look at the code tomorrow, but maybe you can provide an answer in the meantime: how do you handle line numbers? Bash's LINENO is unreliable, contrary to Zsh's, see https://gist.github.com/pawamoy/cca35f0f5ccd56665d6421e9b2d2.... That's why I eventually gave up writing any profiling/tracing/debugging/coverage tool for Bash and moved to support these in Zsh instead. Unfortunately Zsh is missing a ZSH_XTRACEFD like Bash, but that's another story (never finished contributing one). Here's my own attempt at a shell profiler: https://github.com/shellm-org/profiler :)