Make pcre2_match() return (*MARK) names from successful conditional assertions,

as Perl and the JIT do.

ChangeLog

@@ -36,6 +36,9 @@ minimum is potentially useful.
    * When no minimum length is set by the normal scan, but a first and/or last 
      code unit is recorded, set the minimum to 1 or 2 as appropriate.
      
+10. A (*MARK) value inside a successful condition was not being returned by the 
+interpretive matcher (it was returned by JIT). This bug has been mended.
+
 
 Version 10.33 16-April-2019
 ---------------------------

src/pcre2_match.c

@@ -5472,15 +5472,16 @@ fprintf(stderr, "++ op=%d\n", *Fecode);
 
       /* If we are at the end of an assertion that is a condition, return a
       match, discarding any intermediate backtracking points. Copy back the
-      captures into the frame before N so that they are set on return. Doing
-      this for all assertions, both positive and negative, seems to match what
-      Perl does. */
+      mark setting and the captures into the frame before N so that they are
+      set on return. Doing this for all assertions, both positive and negative,
+      seems to match what Perl does. */
 
       if (GF_IDMASK(N->group_frame_type) == GF_CONDASSERT)
         {
         memcpy((char *)P + offsetof(heapframe, ovector), Fovector,
           Foffset_top * sizeof(PCRE2_SIZE));
         P->offset_top = Foffset_top;
+        P->mark = Fmark;
         Fback_frame = (char *)F - (char *)P;
         RRETURN(MATCH_MATCH);
         }

testdata/testinput1

@@ -6343,4 +6343,12 @@ ef) x/x,mark
 /(?&word)*  \. (?<word> \w+ )/xi
     pokus.hokus
 
+/a(?(?=(*:2)b).)/mark
+    abc
+    acb     
+
+/a(?(?!(*:2)b).)/mark
+    acb
+    abc     
+
 # End of testinput1 

testdata/testoutput1

@@ -10049,4 +10049,18 @@ No match
  0: pokus.hokus
  1: hokus
 
+/a(?(?=(*:2)b).)/mark
+    abc
+ 0: ab
+MK: 2
+    acb     
+ 0: a
+
+/a(?(?!(*:2)b).)/mark
+    acb
+ 0: ac
+    abc     
+ 0: a
+MK: 2
+
 # End of testinput1