Xcode 7 Playground error: invalid context 0x0

Question

I am having this error in debug area, even when my playground file is empty:

Sep 23 11:03:50 MyPlayground[68315] : CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.

Sep 23 11:03:50 MyPlayground[68315] : CGContextTranslateCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.

Sep 23 11:03:50 MyPlayground[68315] : CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.

I've seen answers suggesting modifying plist file. However, I am using .playground file, not an ordinary iOS project. There is no plist file inside the .playground. Any sollutions?

I am using Xcode Version 7.0 (7A220).

Was that the .playground file created with previous versions of Xcode? — Dániel Nagy, Sep 23 '15 at 09:23
Report the bug to [Apple](http://radar.apple.com/). They already [know](https://forums.developer.apple.com/thread/13683) about it, but it will speed up their processing of the bug. — Eric Aya, Sep 23 '15 at 09:42
there's an executable interpreter for terminal.just type 'swift' in a single line.I think it's better than playground. — AntiMoron, Jan 12 '16 at 04:45
Do you have an iPad simulator that exists in your regular iOS project? I know you're in a playground, but it's related. — Mihado, Jan 14 '16 at 17:54
@Mihado No I just started a new Playground, not a new Project. — Fengson, Feb 24 '16 at 07:20
@AntiMoron no code. As I already mentioned in my question, I open empty Playground file and this pops out. — Fengson, Feb 29 '16 at 08:01
@Rajesh Did you read the question? I was using Playground... — Fengson, Apr 27 '16 at 05:16

score 1 · Answer 1 · answered May 03 '16 at 05:28

This appears to be unrelated to your Xcode version as it happens to folks using 7.0 - 7.3. However, it does appear to be related to iOS version. This seems to be a 9.0 issue and upgrading your target to 9.1 or higher should fix it.

Apple reportedly knows about this bug and claimed it to be "fixed" as of 10/29/2015.

See here.

score -1 · Answer 2 · answered Feb 29 '16 at 13:29

-1

Try going to your app-info.plist. Check thre UIViewControllerBasedStatusBarAppearance and delete it. This may help

answered Feb 29 '16 at 13:29

kawabungajohn

341
1
3

2

As OP said multiple times, they are using a PLAYGROUND. – Eric Aya Feb 29 '16 at 13:34
2

Based on the answers, I feel like maybe 10% of people read the actual question :-) – Fengson Feb 29 '16 at 14:31

Xcode 7 Playground error: invalid context 0x0

2 Answers2