https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99562
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed:
.LLST40:
.quad .LVL14 # Location list begin address (*.LLST40)
.quad .LVL24 # Location list end address (*.LLST40)
.value 0x12 # Location expression size
.byte 0x9e # DW_OP_implicit_value
.uleb128 0x10
.quad 0xffffffffffffffff
.quad .LVL46 # Location list begin address (*.LLST40)
.quad .LFE14 # Location list end address (*.LLST40)
We say that the implicit value is 16 byte but only supply 8-byte value.
Looking.