diff --git a/Resource/Init/pdf_base.ps b/Resource/Init/pdf_base.ps
index 1a218f4..cffde5c 100644
--- a/Resource/Init/pdf_base.ps
+++ b/Resource/Init/pdf_base.ps
@@ -157,7 +157,7 @@ currentdict /num-chars-dict .undef
     {
       dup ==only () = flush
     } ifelse % PDFSTEP
-  } if % PDFDEBUG
+  } executeonly if % PDFDEBUG
   2 copy .knownget {
     exch pop exch pop exch pop exec
   } {
diff --git a/Resource/Init/pdf_draw.ps b/Resource/Init/pdf_draw.ps
index e18a7c2..0a3924c 100644
--- a/Resource/Init/pdf_draw.ps
+++ b/Resource/Init/pdf_draw.ps
@@ -501,8 +501,8 @@ end
       (        Output may be incorrect.\n) pdfformaterror
       //pdfdict /.gs_warning_issued //true .forceput
       PDFSTOPONERROR { /gs /undefined signalerror } if
-    } if
-  }
+    } executeonly if
+  } executeonly
   ifelse
 } bind executeonly def
 
@@ -1142,7 +1142,7 @@ currentdict end readonly def
           .setglobal
           pdfformaterror
         } executeonly ifelse
-      }
+      } executeonly
       {
         currentglobal //pdfdict gcheck .setglobal
         //pdfdict /.Qqwarning_issued //true .forceput
@@ -1150,8 +1150,8 @@ currentdict end readonly def
         pdfformaterror
       } executeonly ifelse
       end
-    } ifelse
-  } loop
+    } executeonly ifelse
+  } executeonly loop
   {
     (\n   **** Error: File has unbalanced q/Q operators \(too many q's\)\n               Output may be incorrect.\n)
     //pdfdict /.Qqwarning_issued .knownget
@@ -1165,14 +1165,14 @@ currentdict end readonly def
         .setglobal
         pdfformaterror
       } executeonly ifelse
-    }
+    } executeonly
     {
       currentglobal //pdfdict gcheck .setglobal
       //pdfdict /.Qqwarning_issued //true .forceput
       .setglobal
       pdfformaterror
     } executeonly ifelse
-  } if
+  } executeonly if
   pop
 
   % restore pdfemptycount
diff --git a/Resource/Init/pdf_font.ps b/Resource/Init/pdf_font.ps
index 9fb85f6..357ba30 100644
--- a/Resource/Init/pdf_font.ps
+++ b/Resource/Init/pdf_font.ps
@@ -677,7 +677,7 @@ currentdict end readonly def
                 currentglobal 2 index dup gcheck setglobal
                 /FontInfo 5 dict dup 5 1 roll .forceput
                 setglobal
-              } if
+              } executeonly if
               dup /GlyphNames2Unicode .knownget not {
                 //true                        % No existing G2U, make one
               } {
@@ -701,9 +701,9 @@ currentdict end readonly def
         } if
         PDFDEBUG {
           (.processToUnicode end) =
-        } if
-      } if
-    } stopped
+        } executeonly if
+      } executeonly if
+    } executeonly stopped
     {
       .dstackdepth 1 countdictstack 1 sub
       {pop end} for
@@ -1233,19 +1233,20 @@ currentdict /eexec_pdf_param_dict .undef
                 //pdfdict /.Qqwarning_issued //true .forceput
               } executeonly if
               Q
-            } repeat
+            } executeonly repeat
             Q
-          } PDFfile fileposition 2 .execn % Keep pdfcount valid.
+          } executeonly PDFfile fileposition 2 .execn % Keep pdfcount valid.
           PDFfile exch setfileposition
-        } ifelse
-      } {
+        } executeonly ifelse
+      } executeonly
+      {
         % PDF Type 3 fonts don't use .notdef
         % d1 implementation adjusts the width as needed
         0 0 0 0 0 0
         pdfopdict /d1 get exec
       } ifelse
       end end
-    } bdef
+    } executeonly bdef
     dup currentdict Encoding .processToUnicode
     currentdict end .completefont exch pop
 } bind executeonly odef
@@ -2045,9 +2046,9 @@ currentdict /CMap_read_dict undef
           (Will continue, but content may be missing.) = flush
         } ifelse
       } if
-    } if
+    } executeonly if
     /findresource cvx /undefined signalerror
-  } loop
+  } executeonly loop
 } bind executeonly odef
 
 /buildCIDType0 {	% <CIDFontType0-font-resource> buildCIDType0 <font>
diff --git a/Resource/Init/pdf_main.ps b/Resource/Init/pdf_main.ps
index 5305ea6..a59e63c 100644
--- a/Resource/Init/pdf_main.ps
+++ b/Resource/Init/pdf_main.ps
@@ -2749,15 +2749,15 @@ currentdict /PDF2PS_matrix_key undef
           .setglobal
           pdfformaterror
         } executeonly ifelse
-      }
+      } executeonly
       {
         currentglobal //pdfdict gcheck .setglobal
         //pdfdict /.Qqwarning_issued //true .forceput
         .setglobal
         pdfformaterror
       } executeonly ifelse
-    } if
-  } if
+    } executeonly if
+  } executeonly if
   pop
   count PDFexecstackcount sub { pop } repeat
   (after exec) VMDEBUG
diff --git a/Resource/Init/pdf_ops.ps b/Resource/Init/pdf_ops.ps
index 285e582..6c1f100 100644
--- a/Resource/Init/pdf_ops.ps
+++ b/Resource/Init/pdf_ops.ps
@@ -186,14 +186,14 @@ currentdict /gput_always_allow .undef
         .setglobal
         pdfformaterror
       } executeonly ifelse
-    }
+    } executeonly
     {
       currentglobal //pdfdict gcheck .setglobal
       //pdfdict /.Qqwarning_issued //true .forceput
       .setglobal
       pdfformaterror
     } executeonly ifelse
-  } if
+  } executeonly if
 } bind executeonly odef
 
 % Save PDF gstate
@@ -440,11 +440,12 @@ currentdict /gput_always_allow .undef
   dup type /booleantype eq {
     .currentSMask type /dicttype eq {
       .currentSMask /Processed 2 index .forceput
+    } executeonly
+    {
+      .setSMask
+    }ifelse
   } executeonly
   {
-      .setSMask
-  }ifelse
-  }{
   .setSMask
   }ifelse