debug-ignored-errors --> suppress an annoying error/false-positives

Question

In my emacs, i have set (debug-on-error t) to see the error's stacktrace. It is very helpful but for mundane errors, it becomes annoying... One such error is,

Debugger entered--Lisp error: (error "Command attempted to use minibuffer while in minibuffer")
  read-from-minibuffer("Goto line: " nil nil nil nil ("1"))

Emacs has provided a way to suppress backtrace prints on such errors using the variable, debug-ignored-errors. It takes a list of error codes. Say for the error that the variable has no value - the code is '(void-variable).

Where do i find the error codes for all the other stacktrace messages?

Answer 1

debug-ignored-errors can hold signal names (e.g. user-error) but also regular expressions. So try:

(push "\\`Command attempted to use minibuffer while in minibuffer"
      debug-ignored-errors)

But you might also like to report this issue as a bug. This error should probably be changed to a user-error so you don't need to change debug-ignored-errors yourself.