Commit ec50f94ef for imagemagick.org

commit ec50f94efbeaa241165062f6d848ba158f50b83b
Author: Cristy <urban-warrior@imagemagick.org>
Date:   Sun Mar 15 16:49:37 2026 -0400

    check for undefined shift

diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index 7cd378485..c9d0bd878 100644
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -3393,7 +3393,7 @@ static MagickBooleanType ExecuteRPN (FxInfo * pfx, fxRtT * pfxrt, fxFltType *res
           regA = -regA;
           break;
         case oLshift:
-          if ((size_t) (regB+0.5) >= (8*sizeof(size_t)))
+          if (CastDoubleToSizeT(regB+0.5) >= (8*sizeof(size_t)))
             {
               (void) ThrowMagickException ( pfx->exception, GetMagickModule(),
                 OptionError, "undefined shift", "%g", (double) regB);
@@ -3403,7 +3403,7 @@ static MagickBooleanType ExecuteRPN (FxInfo * pfx, fxRtT * pfxrt, fxFltType *res
           regA = (fxFltType) (CastDoubleToSizeT((double) regA+0.5) << CastDoubleToSizeT((double) regB+0.5));
           break;
         case oRshift:
-          if ((size_t) (regB+0.5) >= (8*sizeof(size_t)))
+          if (CastDoubleToSizeT(regB+0.5) >= (8*sizeof(size_t)))
             {
               (void) ThrowMagickException ( pfx->exception, GetMagickModule(),
                 OptionError, "undefined shift", "%g", (double) regB);
@@ -4162,6 +4162,7 @@ MagickPrivate MagickBooleanType FxEvaluateChannelExpression (

   pfx->fxrts[id].thisPixel = NULL;

+
   if (!ExecuteRPN (pfx, &pfx->fxrts[id], &ret, channel, x, y)) {
     (void) ThrowMagickException (
       exception, GetMagickModule(), OptionError,