[regexp] Check we've got a ByteArray in the interpreter

Happy hunting.

Bug: chromium:1262676
Change-Id: I0f3a5519cb9ed3dc4787acd61cb437ee8c2bf2d1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3257716
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77681}

src/regexp/regexp-interpreter.cc

@@ -1075,6 +1075,9 @@ IrregexpInterpreter::Result IrregexpInterpreter::MatchInternal(
     uint32_t backtrack_limit) {
   DCHECK(subject_string.IsFlat());
 
+  // TODO(chromium:1262676): Remove this CHECK once fixed.
+  CHECK(code_array.IsByteArray());
+
   // Note: Heap allocation *is* allowed in two situations if calling from
   // Runtime:
   // 1. When creating & throwing a stack overflow exception. The interpreter