[llvm-bugs] [Bug 34983] New: [coroutines] diagnostics for missing coroutine promise members produce invalid typo corrections

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34983

            Bug ID: 34983
           Summary: [coroutines] diagnostics for missing coroutine promise
                    members produce invalid typo corrections
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangb...@nondot.org
          Reporter: richard-l...@metafoo.co.uk
                CC: dgre...@apple.com, gornisha...@gmail.com,
                    llvm-bugs@lists.llvm.org

Testcase:

#include <experimental/coroutine>
namespace std { using namespace std::experimental; }

struct corotype {
  struct promise_type {
    std::suspend_always initial_suspend();
  };
};
static corotype f() {
}
void h();
corotype g() {
  auto a = f();
  while (co_await a) h();
}


Produces this wrong typo correction:

<stdin>:12:10: error: no member named 'final_suspend' in
'corotype::promise_type'; did you mean 'initial_suspend'?
corotype g() {
         ^
         initial_suspend
<stdin>:6:25: note: 'initial_suspend' declared here
    std::suspend_always initial_suspend();
                        ^

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