Auto-correcting with Style/IfUnlessModifier and Style/SoleNestedConditional breaks code

[ghost]

Style/IfUnlessModifier and Style/SoleNestedConditional produce incorrect code when auto-correcting the following code:

if !error_list.nil?
  if error_list.first == 'Bad error'
    warn 'Error'
    warn 'Error'
  end
end

The following similar bits of code do not have the same problem:

# Before auto-correct
unless error_list.nil?
  if error_list.first == 'Bad error'
    warn 'Error'
    warn 'Error'
  end
end

# After auto-correct (CORRECT)
if !error_list.nil? && (error_list.first == 'Bad error')
  warn 'Error'
  warn 'Error'
end

# Before auto-correct
if !error_list.nil?
  if error_list.first == 'Bad error'
    warn 'Error'
  end
end

# After auto-correct (CORRECT)
warn 'Error' if !error_list.nil? && (error_list.first == 'Bad error')

---

Expected behavior

rubocop --auto-correct should produce the following code:

if !error_list.nil? && (error_list.first == 'Bad error')
  warn 'Error'
  warn 'Error'
end

Actual behavior

Rubocop produces the following incorrect code. The code now throws an error if error_list is nil.

unless error_list.nil? && (error_list.first == 'Bad error')
  warn 'Error'
  warn 'Error'
end

Steps to reproduce the problem

Run rubocop --auto-correct --debug code.rb on the following code.

# frozen_string_literal: true

error_list = nil

if !error_list.nil?
  if error_list.first == 'Bad error'
    warn 'Error'
    warn 'Error'
  end
end

Output on my machine:

For tmp: Default configuration from C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/rubocop-1.19.0/config/default.yml
Inspecting 1 file
Scanning code.rb
Loading cache from .cache/rubocop_cache/ab7574e02bf1ddf27d5908048ef79f0a1f430219/0536d18c9eb040c724be8df71fd74a67730b58ef/a690a3cbd7835d1574c4423e161c138242455f2c
W

Offenses:

code.rb:5:1: C: [Corrected] Style/NegatedIf: Favor unless over if for negative conditions.
if !error_list.nil? ...
^^^^^^^^^^^^^^^^^^^
code.rb:6:1: C: [Corrected] Layout/IndentationWidth: Use 2 (not 4) spaces for indentation.
    warn 'Error'
^^^^
code.rb:6:3: C: [Corrected] Style/SoleNestedConditional: Consider merging nested conditions into outer if conditions.
  if error_list.first == 'Bad error'
  ^^
code.rb:7:5: C: [Corrected] Layout/IndentationConsistency: Inconsistent indentation detected.
    warn 'Error'
    ^^^^^^^^^^^^
code.rb:8:3: W: [Corrected] Layout/EndAlignment: end at 8, 2 is not aligned with unless at 5, 0.
  end
  ^^^

1 file inspected, 5 offenses detected, 5 offenses corrected
Finished in 0.658765800006222 seconds

RuboCop version

rubocop -V
1.19.0 (using Parser 3.0.2.0, rubocop-ast 1.10.0, running on ruby 2.7.4 x64-mingw32)