From 65e48665decb07b949cac8dcc46b18c9835d50c4 Mon Sep 17 00:00:00 2001
From: Karl Williamson <khw@cpan.org>
Date: Thu, 14 Aug 2025 13:10:14 -0600
Subject: [PATCH] hv_macro.h. Convert _dv to legal name

---
 sv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sv.c b/sv.c
index 205a8772eb..dcb0e8f7bc 100644
--- a/sv.c
+++ b/sv.c
@@ -12025,8 +12025,8 @@ Perl_sv_vcatpvfn(pTHX_ SV *const sv, const char *const pat, const STRLEN patlen,
        /* Work around breakage in OTS$CVT_FLOAT_T_X */
 #    define VCATPVFN_NV_TO_FV(nv,fv)                    \
             STMT_START {                                \
-                double _dv = nv;                        \
-                fv = Perl_isnan(_dv) ? LDBL_QNAN : _dv; \
+                double dv_ = nv;                        \
+                fv = Perl_isnan(_dv) ? LDBL_QNAN : dv_; \
             } STMT_END
 #  else
 #    define VCATPVFN_NV_TO_FV(nv,fv) (fv)=(nv)