Open Radar

 
Summary:
When I run my Swift app in Xcode 7.3.1 (with standard Swift 2 compiler) and execution pauses at a breakpoint, I cannot inspect variables with po command. The first time I run po exists (exists is a non-optional Bool variable in current scope) I get a long error message (see below). From the second time I run the same command onwards, I receive error loading helper function: (null) message.

The app is compiled and run on the debug scheme, with no "deployment post processing" and None [-O0] optimization.

Variable contents appear correctly in the variable inspector panel of Xcode.

Same error appears with po self or any other variable both running on device and iOS simulator.

If I run a new clean project, debugging with po works correctly.

Steps to Reproduce:
Create a breakpoint in application.willFinishLaunchingWithOptions. Build and run debug scheme. Execute "po self" or "po exists" in LLDB. (exists is a valid non optional Bool variable)

Expected Results:
The address or the contents of the variable should be printed.

Actual Results:
The following error is displayed in LLDB:

po exists
error loading helper function: <EXPR>:141:9: warning: '--' is deprecated: it will be removed in Swift 3
        --maxItemCounter
        ^~
                         -= 1
<EXPR>:237:14: warning: '++' is deprecated: it will be removed in Swift 3
            i++
             ^~
              += 1
<EXPR>:267:19: warning: 'init(start:end:)' is deprecated: it will be removed in Swift 3.  Use the '..<' operator.
        let rng = Range(start: si, end: ei.advancedBy(-1))
                  ^
<EXPR>:280:9: warning: initialization of variable '$__lldb_error_result' was never used; consider replacing with assignment to '_' or removing it
    var $__lldb_error_result = __lldb_tmp_error
    ~~~~^~~~~~~~~~~~~~~~~~~~
    _
<EXPR>:89:41: error: 'CustomStringConvertible' is ambiguous for type lookup in this context
                    if let csc = (x as? CustomStringConvertible) {
                                        ^~~~~~~~~~~~~~~~~~~~~~~
Swift.CustomStringConvertible:13:17: note: found this candidate
public protocol CustomStringConvertible {
                ^
Castamatic.CustomStringConvertible:1:17: note: found this candidate
public protocol CustomStringConvertible {
                ^
<EXPR>:101:41: error: 'CustomStringConvertible' is ambiguous for type lookup in this context
                    if let csc = (x as? CustomStringConvertible) {
                                        ^~~~~~~~~~~~~~~~~~~~~~~
Swift.CustomStringConvertible:13:17: note: found this candidate
public protocol CustomStringConvertible {
                ^
Castamatic.CustomStringConvertible:1:17: note: found this candidate
public protocol CustomStringConvertible {
                ^


(lldb) po exists
error loading helper function: (null)

(lldb) 

Version:
Xcode 7.3.1 (7D1014)
OS X 10.11.5

Notes:


Configuration:


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