[bug #53994] Can't set a value on keypath using NSValue containing a size

URL:
  <http://savannah.gnu.org/bugs/?53994>

                 Summary: Can't set a value on keypath using NSValue
containing a size
                 Project: GNUstep
            Submitted by: ivucica
            Submitted on: Sun 27 May 2018 05:49:56 PM UTC
                Category: Base/Foundation
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

```objective-c
#import <Foundation/Foundation.h>

@interface A : NSObject
{
  NSSize _s;
}
@end
@implementation A
- (NSSize) s {
  return self->_s;
}
- (void) setS: (NSSize) s {
  self->_s = s;
}
@end
int main() {
  NSSize in = NSMakeSize(1.0, 2.0);
  NSValue * v = [NSValue valueWithSize: in]; 
  /*
  originally observed with:
  NSValue * v = [NSValue valueWithBytes: &in
                               objCType: @encode(NSSize)];
  */
  A * a = [A new];
  [a setValue: v
       forKey: @"s"];

  return 0;  
}
```

Output:

```
$ clang `gnustep-config --objc-flags` `gnustep-config --objc-libs`
`gnustep-config --base-libs` repro.m -o repro && ./repro
clang: warning: argument unused during compilation: '-fobjc-nonfragile-abi'
clang: warning: argument unused during compilation: '-fobjc-nonfragile-abi'
2018-05-27 18:45:53.501 repro[14679:14679] match! point is {_NSPoint=dd}, type
is {_NSSize=dd}
./repro: Uncaught exception NSInvalidArgumentException, reason:
[GSSizeValue-pointValue] should be overridden by subclass
Aborted
```




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