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[qfcc] Ensure type src type is a class

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If the src type is not a class, there is no inheritance chain to walk.
Fixes a segfault when returning self after a syntax error in the
following:

    +(EditStatus *)withRect:(Rect)rect
    {
	return [[[self alloc] initWithRect:rect]:
    }

    -setCursorMode:(CursorMode)mode
    {
	cursorMode = mode;
	return self;
    }
This commit is contained in:
Bill Currie 2021-06-09 12:08:13 +09:00
parent 2a38135dd9
commit 927a446bd3
1 changed files with 4 additions and 2 deletions
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6
tools/qfcc/source/class.c
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@ -455,7 +455,7 @@ category_implements (category_t *cat, protocol_t *protocol)
int
obj_types_assignable (const type_t *dst, const type_t *src)
{
class_t *dst_class, *src_class;
class_t *dst_class, *src_class = 0;
category_t *cat;
int dst_is_proto, src_is_proto;
protocollist_t *dst_protos = 0, *src_protos = 0;
@ -507,7 +507,9 @@ obj_types_assignable (const type_t *dst, const type_t *src)
// check dst is a base class of src
dst_class = dst->t.fldptr.type->t.class;
src_class = src->t.fldptr.type->t.class;
if (src->t.fldptr.type->meta == ty_class) {
src_class = src->t.fldptr.type->t.class;
}
//printf ("%s %s\n", dst_class->name, src_class->name);
while (dst_class != src_class && src_class) {
src_class = src_class->super_class;