Fix non-diagnosis of (?=a)(?R) (positive lookaheads not skipped when checking

for an empty match).


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@282 2f5784b3-3f2a-0410-8824-cb99058d5e15

2 files changed, 20 insertions, 0 deletions

diff --git a/testdata/testinput2 b/testdata/testinput2
index 9b153dc..32c5ef2 100644
--- a/testdata/testinput2
+++ b/testdata/testinput2
@@ -2563,4 +2563,12 @@ a random value. /Ix
 
 /(?P>)/
 
+/(?!\w)(?R)/
+
+/(?=\w)(?R)/
+
+/(?<!\w)(?R)/
+
+/(?<=\w)(?R)/
+
 / End of testinput2 /
diff --git a/testdata/testoutput2 b/testdata/testoutput2
index c7ae26f..72ac0af 100644
--- a/testdata/testoutput2
+++ b/testdata/testoutput2
@@ -9346,4 +9346,16 @@ Failed: subpattern name expected at offset 4
 /(?P>)/
 Failed: subpattern name expected at offset 4
 
+/(?!\w)(?R)/
+Failed: recursive call could loop indefinitely at offset 9
+
+/(?=\w)(?R)/
+Failed: recursive call could loop indefinitely at offset 9
+
+/(?<!\w)(?R)/
+Failed: recursive call could loop indefinitely at offset 10
+
+/(?<=\w)(?R)/
+Failed: recursive call could loop indefinitely at offset 10
+
 / End of testinput2 /