Bash script is indented inconsistently

Question

Open the code below with emacs -q, do set-variable sh-basic-offset 2, then indent-region. All lines are indented with 2, while the echo line is indented with 4. Is this a bug in Emacs, or how do I configure it to indent consistently with 2? (When setting to 8, echo is still indented with 4.)

Using latest release GNU Emacs 25.3.1 on macOS installed with Homebrew.

#!/bin/bash

hello() {
  while true; do
    if [ true ]; then
    ····echo true
    fi
  done
}

Answer 1

It is bug, fixed in version 26.1. As a workaround you can set both the variables sh-indentation and sh-basic-offset to 2.