[clang] [Clang] prevent crash on unterminated __has_embed (PR #163107)

[Aaron Ballman via cfe-commits]

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@@ -250,3 +258,39 @@
 
 #if __has_embed("") // expected-error {{empty filename}}
 #endif
+
+//--- test2.c
+// expected-error at +4 {{missing ')' after '__has_embed'}} \
+   expected-error at +4 {{expected value in expression}} \
+   expected-note at +4 {{to match this '('}} \
+   expected-error at +4 {{unterminated conditional directive}}
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AaronBallman wrote:

Please add the `#endif` to each of these and then you can remove all the unterminated diagnostics.

https://github.com/llvm/llvm-project/pull/163107