public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/95823] New: [coroutines] compiler internal error in captures_temporary,
@ 2020-06-22 19:05 victor.burckel at gmail dot com
  2020-06-23  9:05 ` [Bug c++/95823] " iains at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: victor.burckel at gmail dot com @ 2020-06-22 19:05 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95823

            Bug ID: 95823
           Summary: [coroutines] compiler internal error in
                    captures_temporary,
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: victor.burckel at gmail dot com
  Target Milestone: ---

I get a compiler internal error when passing a value to a coroutine that is
retrieved through two inderections within smart pointers (I don't get the error
with raw pointers, that's the smallest piece of code I was able to produce).
> internal compiler error: in captures_temporary, at cp/coroutines.cc:2717

It can be easily worked around by making a local variable containing the value.
Of course the code would crash in runtime as the pointers are not initialized,
but I get the same error when initializing them.

I managed to reproduce with godbolt (both gcc10.1 and gcc trunk give me the
assertion)
https://godbolt.org/z/XarC_M

#include <coroutine>
#include <memory>

struct task {
  struct promise_type {
    auto initial_suspend() noexcept { return std::suspend_always{}; }
    auto final_suspend() noexcept { return std::suspend_always{}; }
    void return_void() {}
    task get_return_object() { return task{}; }
    void unhandled_exception() noexcept {}
  };

  ~task() noexcept {}

  bool await_ready() const noexcept { return false; }
  void await_suspend(std::coroutine_handle<>) noexcept {}
  void await_resume() noexcept {}
};

struct Id
{
    std::unique_ptr<int> value;
};

task g(int);

task f() {
    std::unique_ptr<Id> id;
    co_await g(*id->value);
}

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-08-04 15:35 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-06-22 19:05 [Bug c++/95823] New: [coroutines] compiler internal error in captures_temporary, victor.burckel at gmail dot com
2020-06-23  9:05 ` [Bug c++/95823] " iains at gcc dot gnu.org
2020-07-16 21:02 ` cvs-commit at gcc dot gnu.org
2020-07-23  6:51 ` rguenth at gcc dot gnu.org
2020-07-29  9:59 ` cvs-commit at gcc dot gnu.org
2020-08-04 15:35 ` iains at gcc dot gnu.org

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).