bugGNUstep - Bugs: bug #39088, Suppressing warnings in the GSWeb...


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bug #39088: Suppressing warnings in the GSWeb build

Submitted by:  Graham Lee <leeg>
Submitted on:  Mon 27 May 2013 08:27:14 PM UTC  
Category: gdl2Severity: 3 - Normal
Item Group: BugStatus: Fixed
Privacy: PublicAssigned to: Sebastian Reitenbach <buzzdee>
Open/Closed: Closed

Fri 31 May 2013 08:35:17 AM UTC, comment #5:

last patch applied to svn rev 36684.


Sebastian Reitenbach <buzzdee>
Project MemberIn charge of this item.
Thu 30 May 2013 09:13:30 AM UTC, comment #4:

I, and the original author of that code, were relying on the fact that -[GSWMultiKeyDictionary allValues] does in fact return a mutable array although its signature says it returns an array. I think you're correct though and your patch is better: client code that wants the array to be mutable should arrange that itself rather than relying on an implementation detail in the dictionary class.


Graham Lee <leeg>
Thu 30 May 2013 08:34:06 AM UTC, comment #3:

Hi Graham,

i applied all chunks of the patch, but one, where I think its wrong.

In the last hunk in your patch to -GSWeb/GSWMultiKeyDictionary.m, you cast from a superclass to a subclass, which I think its not safe. AFAIK, casting is only fiddling with pointers, but its not
really changing the type of class that you are casting. So if someone now calls a method implemented in NSMutableArray, it will probably fail miserably. Only when you are sure, nothing in the code will call methods from the subclass, then it might be safe to cast from superclass to subclass. But in the code I see some lines below in -nextObject, calling -removeLastObject on the casted class, and I guess that would fail then.
I think casting is only safe the other way around, casting from a subclass to a superclass.

Anyways, so instead of your cast:
ASSIGN(_objects,(NSMutableDictionary *)[_dictionary allValues]);

I'd better correctly initialize an mutable array:
_objects = [NSMutableArray arrayWithArray:[_dictionary allValues]];

But since memory management is still something I not fully grasped yet, it may be I have to add a -retain to the line, or some autorelease or whatnot?

Attached my version of solving the problem. If somebody can tell me its OK, or if I need a retain or something, then I'd go on commit that instead. Or if someone tells me that my assumptions are totally wrong above, and your patch is just right ;)


(file #28208)

Sebastian Reitenbach <buzzdee>
Project MemberIn charge of this item.
Tue 28 May 2013 03:49:16 PM UTC, comment #2:

I'm using clang 3.2 on OpenBSD, amd64.

Your patch fixes the warnings to GSWContext.m, and to GSWMultiKeyDictionary.m. The other warnings you may see, and what you are fixing, I don't get, with and without your patch.
But in general, the changes to GSWeb/GSWDeclarationParser.m look good to me.

I even see some more warnings than those you are fixing. Just for the records, they are listed below.

Will discuss with David, and then go on


GSWLongResponsePage.m:312:12: warning: assigning to 'WOElement *' from incompatible type 'id<WOActionResults>'
GSWLongResponsePage.m:315:10: warning: returning 'WOElement *' from a function with incompatible result type 'id<WOActionResults>'

GSWLogin.m:107:14: warning: instance method '-validateLogin' not found (return type defaults to 'id') [-Wobjc-method-access]
GSWLogin.m:110:12: warning: instance method '-validateLoginUser:password:' not found (return type defaults to 'id') [-Wobjc-method-access]

GSWSimpleFormComponent.m:121:10: warning: instance method '-sendActionFromComponent:' not found (return type defaults to 'id') [-Wobjc-method-access]
1 warning generated.
GSWCacheElement.m:333:27: warning: instance method '-startCache' not found (return type defaults to 'id') [-Wobjc-method-access]
GSWCacheElement.m:333:26: warning: incompatible pointer to integer conversion assigning to 'int' from 'id' [-Wint-conversion]
GSWCacheElement.m:349:39: warning: instance method '-stopCacheOfIndex:' not found (return type defaults to 'id') [-Wobjc-method-access]

WODisplayGroup.m:2105:59: warning: incompatible pointer types sending 'NSArray ' to parameter of type 'NSIndexSet ' [-Wincompatible-pointer-types]
WODisplayGroup.m:2275:17: warning: incomplete implementation [-Wincomplete-implementation]

Sebastian Reitenbach <buzzdee>
Project MemberIn charge of this item.
Mon 27 May 2013 08:34:41 PM UTC, comment #1:

I should have said "fixing", not "suppressing" - I've addressed the problems rather than silenced the compiler.

Graham Lee <leeg>
Mon 27 May 2013 08:27:14 PM UTC, original submission:

GSWeb is compiled with -Werror, and the changes in the attached patch are required to make it build successfully on Apple with the clang compiler from Xcode 4.6.2. There are also changes to various format strings required, these were broken out into their own bug (#39087) to investigate whether I had handled NSUInteger in a GNUstep-friendly way.

Graham Lee <leeg>


Attached Files
file #28208:  patch-GSWeb_GSWMultiKeyDictionary_m added by buzzdee (452B - application/octet-stream)
file #28189:  gsw-build.patch added by leeg (4KiB - application/octet-stream)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -unavailable- added by buzzdee (Posted a comment)
  • -unavailable- added by leeg (Submitted the item)

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    Follow 6 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sat 21 Dec 2013 07:10:41 AM UTCbuzzdeeOpen/ClosedOpen=>Closed
    Fri 31 May 2013 08:35:17 AM UTCbuzzdeeStatusNeed Info=>Fixed
    Thu 30 May 2013 08:34:06 AM UTCbuzzdeeAttached File-=>Added patch-GSWeb_GSWMultiKeyDictionary_m, #28208
      StatusNone=>Need Info
      Assigned toNone=>buzzdee
    Mon 27 May 2013 08:27:14 PM UTCleegAttached File-=>Added gsw-build.patch, #28189

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