[libcxx-commits] [libcxx] [libc++][regex] Fix #51028 throw exception in the case of wrong range (PR #148231)

[Louis Dionne via libcxx-commits]

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@@ -2120,7 +2120,7 @@ public:
       __ranges_.push_back(
           std::make_pair(__traits_.transform(__b.begin(), __b.end()), __traits_.transform(__e.begin(), __e.end())));
     } else {
-      if (__b.size() != 1 || __e.size() != 1)
+      if (__b.size() != 1 || __e.size() != 1 || __b[0] > __e[0])
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ldionne wrote:

Should we be using `char_traits::lt` to perform this comparison though?

https://github.com/llvm/llvm-project/pull/148231