1928500 - nsMathMLChar.cpp:875:19: error: possibly dangling reference to a temporary [-Werror=dangling-reference]

Status: NEW

(Core :: MathML, defect)

Description

[ISHIKAWA, Chiaki (I will be tied up until Dec 14 with day job events.)]

Similar to bug 1927407 ?

In file included from Unified_cpp_layout_mathml0.cpp:2:
/NEW-SSD/NREF-COMM-CENTRAL/mozilla/layout/mathml/nsMathMLChar.cpp: In lambda function:
/NEW-SSD/NREF-COMM-CENTRAL/mozilla/layout/mathml/nsMathMLChar.cpp:875:19: error: possibly dangling reference to a temporary [-Werror=dangling-reference]
  875 |       const auto& firstFontInList = familyList.list.AsSpan()[0];
      |                   ^~~~~~~~~~~~~~~
/NEW-SSD/NREF-COMM-CENTRAL/mozilla/layout/mathml/nsMathMLChar.cpp:875:63: note: the temporary was destroyed at the end of the full expression ‘familyList.mozilla::StyleFontFamilyList::list.mozilla::StyleArcSlice<mozilla::StyleSingleFontFamily>::AsSpan().mozilla::Span<const mozilla::StyleSingleFontFamily, 18446744073709551615>::operator[](0)’
  875 |       const auto& firstFontInList = familyList.list.AsSpan()[0];
      |                                                               ^

I wonder if a global header file changed or something.
This is with GCC :gcc-14 (Debian 14.2.0-1) 14.2.0