Fix bad compile of patterns like /[A-`]/i,utf where the range contains

characters with multiple other cases and the ranges adjoin.

ChangeLog

@@ -115,6 +115,11 @@ of various issues, and new ones are still appear unfortunately. To fix
 existing and future issues, size computation is eliminated from the code,
 and replaced by on-demand memory allocation.
 
+25. A pattern such as /(?i)[A-`]/, where characters in the other case are
+adjacent to the end of the range, and the range contained characters with more
+than one other case, caused incorrect behaviour when compiled in UTF mode. In
+that example, the range a-j was left out of the class.
+
 
 Version 10.00 05-January-2015
 -----------------------------

src/pcre2_compile.c

@@ -2864,7 +2864,11 @@ if ((options & PCRE2_CASELESS) != 0)
       range. Otherwise, use a recursive call to add the additional range. */
 
       else if (oc < start && od >= start - 1) start = oc; /* Extend downwards */
-      else if (od > end && oc <= end + 1) end = od;       /* Extend upwards */
+      else if (od > end && oc <= end + 1)
+        {
+        end = od;       /* Extend upwards */
+        if (end > classbits_end) classbits_end = (end <= 0xff ? end : 0xff);
+        }
       else n8 += add_to_class(classbits, uchardptr, options, cb, oc, od);
       }
     }

testdata/testinput4

@@ -2216,4 +2216,7 @@
     \x{23a}\x{2c65}\x{2c65}\x{2c65}
     \x{23a}\x{23a}\x{2c65}\x{23a}
 
+/[A-`]/i,utf
+    abcdefghijklmno
+
 # End of testinput4

testdata/testinput5

@@ -1638,4 +1638,7 @@
 
 /[^\xff]((?1))/utf,debug
 
+/[A-`]/iB,utf
+    abcdefghijklmno
+
 # End of testinput5 

testdata/testoutput4

@@ -3735,4 +3735,8 @@ No match
     \x{23a}\x{23a}\x{2c65}\x{23a}
 No match
 
+/[A-`]/i,utf
+    abcdefghijklmno
+ 0: a
+
 # End of testinput4

testdata/testoutput5

@@ -4009,4 +4009,14 @@ Subject length lower bound = 1
 /[^\xff]((?1))/utf,debug
 Failed: error 140 at offset 11: recursion could loop indefinitely
 
+/[A-`]/iB,utf
+------------------------------------------------------------------
+        Bra
+        [A-z\x{212a}\x{17f}]
+        Ket
+        End
+------------------------------------------------------------------
+    abcdefghijklmno
+ 0: a
+
 # End of testinput5