https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120453
Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2025-05-28
--- Comment #8 from Iain Sandoe <iains at gcc dot gnu.org> ---
For the reduced test case (with a couple of small tweaks to avoid miscellaneous
warnings).
* frame #0: 0x0000000102f388b4 cc1plus`error(gmsgid="use of deleted function
%qD") at diagnostic-global-context.cc:393:25
frame #1: 0x00000001001d0ce5 cc1plus`mark_used(decl=0x000000010c301800,
complain=3) at decl2.cc:6352:9
frame #2: 0x000000010002f37e
cc1plus`::build_over_call(cand=0x0000000130008110, flags=5, complain=3) at
call.cc:10332:14
frame #3: 0x000000010003786b
cc1plus`build_new_method_call(instance=0x0000000108bfb7e0,
fns=0x0000000108bfbd80, args=0x000000030b1f8790,
conversion_path=0x0000000108a0e820, flags=5, fn_p=0x0000000000000000,
complain=3) at call.cc:12188:31
frame #4: 0x0000000100035641
cc1plus`build_special_member_call(instance=0x0000000108bfb7e0,
name=0x0000000108a23840, args=0x000000030b1f8790, binfo=0x0000000108a0e820,
flags=5, complain=3) at call.cc:11671:31
frame #5: 0x00000001000263b0 cc1plus`::build_temp(expr=0x0000000108bfb7a0,
type=0x0000000108bca738, flags=5, diagnostic_kind=0x000000030b1f8960,
complain=3) at call.cc:8428:36
frame #6: 0x000000010002a1c7
cc1plus`::convert_like_internal(convs=0x0000000130008040,
expr=0x0000000108bfb7a0, fn=0x0000000000000000, argnum=0,
issue_conversion_warnings=true, c_cast_p=false, nested_p=false, complain=3) at
call.cc:9171:25
frame #7: 0x000000010002af6e
cc1plus`::convert_like(convs=0x0000000130008040, expr=0x0000000108bfb7a0,
fn=0x0000000000000000, argnum=0, issue_conversion_warnings=true,
c_cast_p=false, nested_p=false, complain=3) at call.cc:9416:32
frame #8: 0x000000010002afe4
cc1plus`::convert_like(convs=0x0000000130008040, expr=0x0000000108bfb7a0,
complain=3) at call.cc:9429:23
frame #9: 0x000000010003fbb7
cc1plus`perform_implicit_conversion_flags(type=0x0000000108bca738,
expr=0x0000000108bfb7a0, complain=3, flags=5) at call.cc:14007:27
frame #10: 0x000000010053f83d
cc1plus`convert_for_initialization(exp=0x0000000000000000,
type=0x0000000108bca738, rhs=0x0000000108bfb7a0, flags=5, errtype=ICR_RETURN,
fndecl=0x0000000000000000, parmnum=0, complain=3) at typeck.cc:10662:46
frame #11: 0x000000010054469f
cc1plus`check_return_expr(retval=0x0000000108bfb7a0,
no_warning=0x000000030b1f8d67, dangling=0x000000030b1f8d66) at
typeck.cc:11477:4
frame #12: 0x000000010049147a
cc1plus`finish_return_stmt(expr=0x0000000108bf08e8) at semantics.cc:1588:28
frame #13: 0x00000001000ef16b
cc1plus`cp_coroutine_transform::build_ramp_function(this=0x0000000107704aa0) at
coroutines.cc:5300:22
====
but ...
11474 case that functype is smaller than the valtype. */
11475 if (!converted)
11476 retval = convert_for_initialization
-> 11477 (NULL_TREE, functype, retval, flags, ICR_RETURN,
NULL_TREE, 0,
11478 tf_warning_or_error);
----
(lldb) p coro_get_ramp_function (current_function_decl)
(tree) $3 = nullptr
(lldb) p named_return_value_okay_p
(bool) $4 = false
So something is amiss earlier in the code - we are attempting a conversion
which we should not be.
