Stack overflow detected during fuzzing

[0x64617061]

While fuzzing the cssparser fuzz target I encountered a stack overflow leading to a core dump.
The overflow occurs when the input contains ~17500 (or more) opening brackets, i.e., (, [, {.

I attached an example input that was generated by the fuzzer.

64a4f3d80c6f9598cfc40255f7410db68675019d5c2be9eb5555ca5721c29516.txt