[Bug c++/102656] New: ICE on coroutines on -fsanitize=address -O1

[dprokoptsev at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102656

            Bug ID: 102656
           Summary: ICE on coroutines on -fsanitize=address -O1
           Product: gcc
           Version: 11.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dprokoptsev at gmail dot com
  Target Milestone: ---

Here's the minimal example I've been able to come up with:

// ICEs on -fcoroutines -O1 -fsanitize=address, on any gcc version between 10.2
and trunk (does compile though on 10.1), checked on godbolt.

#include <coroutine>
/* 2*/ class promise;
/* 3*/
/* 4*/ struct future {
/* 5*/     using promise_type = promise;
/* 6*/     future() = default;
/* 7*/     int x = 0;  // commenting out this line resolves the ICE
/* 8*/ };
/* 9*/ 
/*10*/ class promise {
/*11*/  public:
/*12*/    future get_return_object() noexcept { return {}; }
/*13*/    auto initial_suspend() noexcept { return std::suspend_never{}; }
/*14*/    auto final_suspend() noexcept { return std::suspend_never{}; }
/*15*/
/*16*/    void return_void() noexcept {}
/*17*/    void unhandled_exception() {}
/*18*/};
/*19*/
/*20*/ future func() { co_return; }

gcc-10.2 [x86-64] yields
<source>:20:28: internal compiler error: in expand_expr_addr_expr_1, at
expr.c:8075
   20 | future func() { co_return; }