[clang] [clang] Fix-it hint for `++this` -> `++*this` when deref is modifiable (PR #94159)

[via cfe-commits]

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@@ -10,6 +10,7 @@ void h() {
   SEL* ps = &s;
 
   @selector(dealloc) = s;  // expected-error {{expression is not assignable}}
+  // expected-note at -1 {{add '*' to dereference it}}
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Sirraide wrote:

I do hope someone who knows Objective-C(++) can come along and comment on whether this makes sense, because I candidly don’t know.

CC @rjmccall 

https://github.com/llvm/llvm-project/pull/94159