Silence ABI warning C5291 for the entire STL (#5645)

StephanTLavavej · web-flow · commit f015db5833e8 · 2025-07-15T14:26:46.000-07:00
diff --git a/stl/inc/yvals_core.h b/stl/inc/yvals_core.h
@@ -808,6 +808,9 @@
 // warning C5278: adding a specialization for 'type trait' has undefined behavior
 // warning C5280: a static operator '()' requires at least '/std:c++23preview'
 // warning C5281: a static lambda requires at least '/std:c++23preview'
+// warning C5291: 'DERIVED': deriving from the base class 'BASE' can cause potential runtime issues
+//                due to an ABI bug. Recommend adding a 4-byte data member to the base class
+//                for the padding at the end of it to work around this bug. (TRANSITION, ABI)
 // warning C6294: Ill-defined for-loop: initial condition does not satisfy test. Loop body not executed
 
 #ifndef _STL_DISABLED_WARNINGS
@@ -816,7 +819,7 @@
     4180 4324 4412 4455 4494 4514 4574 4582 4583 4587 \
     4588 4619 4623 4625 4626 4643 4648 4702 4793 4820 \
     4868 4988 5026 5027 5045 5220 5246 5278 5280 5281 \
-    6294                                              \
+    5291 6294                                         \
     _STL_DISABLED_WARNING_C4577                       \
     _STL_DISABLED_WARNING_C4984                       \
     _STL_DISABLED_WARNING_C5053                       \
