Debugger output does not correspond to actual value of variable
Originator: | nih | ||
Number: | rdar://36518505 | Date Originated: | January 15 2018, 12:30 PM |
Status: | Open | Resolved: | |
Product: | Xcode | Product Version: | 9.2 |
Classification: | bug | Reproducible: | Yes |
Summary: For certain combinations of fields in a struct with an embedded struct, the debugger output does not correspond to what is actually stored. Steps to Reproduce: 1. Create blank Xcode iOS project, Swift 2. Create a struct B like this: struct B { let gpsWeek: UInt16 let timeOfWeekMillis: UInt32 } 3. Create struct A with 3 fields like this struct A { let telegramId: UInt16 let timeTag: B let remainingPathPts: UInt16 } 4. Create an instance of A: let a = A( telegramId: 1, timeTag: B(gpsWeek: 2, timeOfWeekMillis: 3), remainingPathPts: 4) 5. Put a breakpoint below this and run 6. When debugger breaks do a "po a" command Expected Results: ▿ A - telegramId : 1 ▿ timeTag : B - gpsWeek : 3 - timeOfWeekMillis : 3 - remainingPathPts : 4 Actual Results: ▿ A - telegramId : 1 ▿ timeTag : B - gpsWeek : 3 - timeOfWeekMillis : 4 - remainingPathPts : 0 Version/Build: Xcode Version 9.2 (9C40b) Configuration: Attached zip with Xcode project to reproduce. Apart from added file Bugger.swift only 1 line in AppDelegate.swift (to call Bugger) has been changed from Xcode template generated project.
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