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Editorial Team
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Asked: 2026-05-13T21:44:08+00:00

This might be iPhone specific, I’m not sure. The compiler doesn’t complain when building

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This might be iPhone specific, I’m not sure. The compiler doesn’t complain when building for the simulator but when compiling for device it throws some funky errors when I try to set properties for references to objects. Eg,

@property (nonatomic) CGRect  &finalFrame;

and the coressponding synthesizer 

@synthesize finalFrame;

for a variable declared as

CGRect finalFrame;

Gives the errors

  • type of property ‘finalFrame’ does not match type of ivar ‘finalFrame’
  • Unrecognisable insn:
  • Internal compiler error: Bus error
  • Internal compiler error: in extract_insn, at recog.c:2904

However I can do it manually without issue, with the following methods:

- (CGRect&)finalFrame;
- (void)setFinalFrame:(CGRect&)aFrame;

Is this a gcc bug? It does compile for the simulator.

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1 Answer

  1. Editorial Team

    Your property is declared as a reference type (CGRect&) but your instance variable is not a reference type (CGRect). They need to be the same to use @synthesize.

    Also, it’s a little weird to be using C++ reference types as Objective-C properties, but I guess that might work as long as all the files are being compiled as Objective-C++.

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