Open Radar

 
Summary:
If you nest an invocation of SKAction.run(_ block:) inside a call to SKScene.run(.sequence([…])), double-clicking or hitting Return to expand the code placeholder replaces the whole nested stack with the innermost call.

Steps to Reproduce:
1. Create a subclass of SKScene.
2. In an instance function or initializer, add the following code:

run(.sequence([
    .wait(forDuration: 3),
]))

3. Add a newline after .wait(forDuration: 3), and type the following:

.run

4. Note that there are three available autocomplete suggestions that take a closure parameter:
 - 1. run { code }
 - 2. run(block: () -> Void)
 - 3. run(block: () -> Void, queue: DispatchQueue)

5. If you accept the first suggestion, it expands the suggestion inline as you would expect, using trailing closure syntax, as .run {\n\t<#code#>\n}. (newlines and tabs indicated with 
\n and \t for clarity).
6. Instead, go back a step and try accepting the second suggestion.

Expected Results:
Like step 5, it replaces just the innermost placeholder with the {\n\t<#code#>\n} trailing closure syntax.

Actual Results:
It replaces the whole run(.sequence([…])) block with just run {\n\t<#code#>\n}.

Version:
Xcode 9.0 (9M214v)

Notes:
Attached video also uploaded to https://cl.ly/mJu2