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boostorg · Oct 30, 2024 · 6567738 · 6567738
1 parent 93cc45a
commit 6567738
Showing 1 changed file with 22 additions and 4 deletions.
diff --git a/include/boost/regex/v5/perl_matcher_common.hpp b/include/boost/regex/v5/perl_matcher_common.hpp
@@ -591,14 +591,32 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_backref()
       }while((r.first != r.second) && ((*m_presult)[index].matched != true));
    }
 
-   if((m_match_flags & match_perl) && !(*m_presult)[index].matched)
+   if((m_match_flags & match_perl) && !(*m_presult)[index].matched){
       return false;
+   }
+
+   auto const& submatch = (*m_presult)[index];
+   BidiIterator i = submatch.get_first();
+   BidiIterator j = submatch.get_second();
+
+   {
+      auto ic = i;
+      auto jc = j;
+      auto curr = 0;
+      while(ic != jc) {
+         ++ic;
+         if(++curr >= 5000) {
+            boost::throw_exception(std::runtime_error("lmao no way bro, it's over"));
+         }
+      }
+   }
 
-   BidiIterator i = (*m_presult)[index].first;
-   BidiIterator j = (*m_presult)[index].second;
    while(i != j)
    {
-      if((position == last) || (traits_inst.translate(*position, icase) != traits_inst.translate(*i, icase)))
+      if((position == last))
+         return false;
+
+      if((traits_inst.translate(*position, icase) != traits_inst.translate(*i, icase)))
          return false;
       ++i;
       ++position;