[clang] [clang] Bounds checking on unclosed parentheses, brackets or braces in Expanded Tokens (PR #69849)

[Nathan Ridge via cfe-commits]

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@@ -585,6 +585,17 @@ TEST_F(TokenCollectorTest, DelayedParsing) {
   EXPECT_THAT(collectAndDump(Code), StartsWith(ExpectedTokens));
 }
 
+TEST_F(TokenCollectorTest, UnclosedToken) {
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HighCommander4 wrote:

Indeed, it looks like `TokenBuffer::spelledForExpanded()` (which is the only call site of `spelledForExpandedToken()`)  is not called by anything currently in this test.

To exercise `spelledForExpanded()`, we will need to make an explicit call to it, the way a number of other tests in this file do.

https://github.com/llvm/llvm-project/pull/69849