compilecode: Signify ^Q and $Q (Q is *, + or ?) as errors.

^* and ^+ cause an "infinite loop" in the recursive, recursiveloop and backtrack VMs. ^? and $* etc. are nonsense (if they are regarded as assertions). All of them raise "nothing to repeat" in Python3. Also add tests.
pfalcon · Jul 24, 2015 · e5f770b · e5f770b
1 parent d127f92
commit e5f770b
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diff --git a/compilecode.c b/compilecode.c
@@ -142,10 +142,12 @@ static const char *_compilecode(const char *re, ByteProg *prog, int sizecode)
         case '^':
             EMIT(PC++, Bol);
             prog->len++;
+            term = PC;
             break;
         case '$':
             EMIT(PC++, Eol);
             prog->len++;
+            term = PC;
             break;
         }
     }

diff --git a/run-tests b/run-tests
@@ -68,6 +68,8 @@ test_suite = [
     ("search", "|+", ""),
     ("search", "|*", ""),
     ("search", "|?", ""),
+    ("search", "^*", ""),
+    ("search", "$*", ""),
 ]
 
 import re