C++ bracket mistmatch with literal character

[yangrq1018]

Explain the issue

void foo() { // this bracket
  int a = 3;
  if (a == '}') { // matches the literal '}' here
  }
}

void bar() {
  char *b = "hello";
  if (b == "}") {
  }
}

In this example, in the first function the brackets enclosing the function is mismatched with a literal '}'.
In the second function I confirm that only character '{' is matched, strings like "{" are not.

1. What vim version are you using? If using neovim, Are you using
   tree-sitter or classic matching?
   NVIM v0.10.0-dev-2063+ga767c046f
   I have treesitter integration by setting

require("nvim-treesitter.configs").setup {
  matchup = {
    enable = true,
  },
}

But I can confirm that with or without TS integrated the bug is the same.
2. Steps to reproduce
Simply create a C/C++ header or source file and paste in the code above. The wrong pair of brackets are highlighted.
4. Expected behavior
String or character literals should not be mismatched.
6. Observed behavior