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-rw-r--r--win/rules.vc4
-rw-r--r--win/tclWinPort.h1
2 files changed, 3 insertions, 2 deletions
diff --git a/win/rules.vc b/win/rules.vc
index 3107756..47c0742 100644
--- a/win/rules.vc
+++ b/win/rules.vc
@@ -1470,8 +1470,8 @@ cdebug = $(cdebug) -Zi
!endif # $(DEBUG)
-# cwarn includes default warning levels, also C4146 is useless.
-cwarn = $(WARNINGS) -wd4146
+# cwarn includes default warning levels, also C4090 (buggy) and C4146 is useless.
+cwarn = $(WARNINGS) -wd4090 -wd4146
!if "$(MACHINE)" == "AMD64" || "$(MACHINE)" == "ARM64"
# Disable pointer<->int warnings related to cast between different sizes
diff --git a/win/tclWinPort.h b/win/tclWinPort.h
index 455ceab..b61e481 100644
--- a/win/tclWinPort.h
+++ b/win/tclWinPort.h
@@ -458,6 +458,7 @@ typedef DWORD_PTR * PDWORD_PTR;
#endif /* _MSC_VER || __MSVCRT__ */
#if defined(_MSC_VER)
+# pragma warning(disable:4090) /* see: https://developercommunity.visualstudio.com/t/c-compiler-incorrect-propagation-of-const-qualifie/390711 */
# pragma warning(disable:4146)
# pragma warning(disable:4244)
# pragma warning(disable:4267)