When a Git process is running for side-effects, Magit displays an indicator in the mode line, using the
If the Git process exits successfully, the process indicator is removed from the mode line immediately.
In the case of a Git error, the process indicator is not removed, but is instead highlighted with the
magit-mode-line-process-error face, and the error details from the process buffer are provided as a tooltip for mouse users. This error indicator persists in the mode line until the next magit buffer refresh.
If you do not wish process errors to be indicated in the mode line, customize the
magit-process-display-mode-line-error user option.
Process errors are additionally indicated at the top of the status buffer.