[clang] [clang][analyzer] fix crash when modelling 'getline' function in checkers (PR #145229)

[Balazs Benics via cfe-commits]

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@@ -369,6 +380,9 @@ ProgramStateRef UnixAPIMisuseChecker::EnsureGetdelimBufferAndSizeCorrect(
 
 void UnixAPIMisuseChecker::CheckGetDelim(CheckerContext &C,
                                          const CallEvent &Call) const {
+  if (Call.getNumArgs() < 2)
+    return;
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steakhal wrote:

Why don't we check `!= 4` here? By judging the function name we should only accept the `getdelim` function that has 4 parameters (thus arguments).

https://github.com/llvm/llvm-project/pull/145229