Open Radar

 
Summary:
The lldb rbreak command is not finding the symbol and creating a breakpoint for a certain expression, when limited to a specific file.  See the "steps to reproduce" for more detail.

This lldb command does not create any breakpoints in the file Foo.swift:
  rbreak name.sett.* -f Foo.swift

However, both of these do create breakpoint(s) in the expected location in Foo.swift:
  rbreak name.sett.*
  rbreak name.set.* -f Foo.swift

Steps to Reproduce:
In Xcode, create a single view iOS application.  Add a file Foo.swift, with a body like this:

class Foo {
    var name: String?
}

Launch the application in the simulator.  In Xcode, press the pause button to drop into lldb.
Try to set a breakpoint for the name.setter in Foo.swift with this lldb command:

  rbreak name.sett.* -f Foo.swift

Expected Results:
Breakpoint(s) are set.

Observed Results:
Breakpoint 2: no locations (pending).
WARNING:  Unable to resolve breakpoint to any actual locations.

Version:
Xcode: Version 8.3.3 (8E3004b)
macOS: 10.12.5

Notes:
What is weird is that this does work (name.set.* instead of name.sett.*):
(lldb): rbreak name.set.* -f Foo.swift
Breakpoint 5: where = LLDBTest`LLDBTest.Foo.name.setter : Swift.Optional<Swift.String> + 156 at Foo.swift:11, address = 0x0000000108aa1bec

(lldb): breakpoint list
5: regex = 'name.set.*', locations = 1, resolved = 1, hit count = 0
  5.1: where = LLDBTest`LLDBTest.Foo.name.setter : Swift.Optional<Swift.String> + 156 at Foo.swift:11, address = 0x0000000108aa1bec, resolved, hit count = 0

Configuration:
No special config necessary