Caseless matching of backreferences with fixed length repetitions was broken.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@746 2f5784b3-3f2a-0410-8824-cb99058d5e15

4 files changed, 31 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index b843407..b6e3e25 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -20,6 +20,10 @@ Version 8.21
 5.  Supporting of \x, \U and \u in JavaScript compatibility mode based on the
     ECMA-262 standard.
 
+6.  Lookbehinds such as (?<=a{2}b) that contained a fixed repetition were
+    erroneously being rejected as "not fixed length" if PCRE_CASELESS was set.
+    This bug was probably introduced by change 9 of 8.13. 
+
 
 Version 8.20 21-Oct-2011
 ------------------------
diff --git a/pcre_compile.c b/pcre_compile.c
index 7ece490..0f875d0 100644
--- a/pcre_compile.c
+++ b/pcre_compile.c
@@ -1646,6 +1646,7 @@ for (;;)
     need to skip over a multibyte character in UTF8 mode.  */
 
     case OP_EXACT:
+    case OP_EXACTI: 
     branchlength += GET2(cc,1);
     cc += 4;
 #ifdef SUPPORT_UTF8
diff --git a/testdata/testinput1 b/testdata/testinput1
index c913ee4..aa9ce42 100644
--- a/testdata/testinput1
+++ b/testdata/testinput1
@@ -4251,4 +4251,14 @@
 /[:a]xxx[b:]/
      :xxx:
      
+/(?<=a{2})b/i
+    xaabc
+    ** Failers
+    xabc  
+
+/(?<!a{2})b/i
+    xabc
+    ** Failers
+    xaabc  
+
 /-- End of testinput1 --/
diff --git a/testdata/testoutput1 b/testdata/testoutput1
index 030f04f..5a025e2 100644
--- a/testdata/testoutput1
+++ b/testdata/testoutput1
@@ -6952,4 +6952,20 @@ No match
      :xxx:
  0: :xxx:
      
+/(?<=a{2})b/i
+    xaabc
+ 0: b
+    ** Failers
+No match
+    xabc  
+No match
+
+/(?<!a{2})b/i
+    xabc
+ 0: b
+    ** Failers
+No match
+    xaabc  
+No match
+
 /-- End of testinput1 --/