================
@@ -339,3 +363,107 @@ void fflush_on_open_failed_stream(void) {
}
fclose(F);
}
+
+void test_fscanf_eof() {
+ FILE *F1 = tmpfile();
+ if (!F1)
+ return;
+
+ int a;
+ unsigned b;
+ int ret = fscanf(F1, "%d %u", &a, &b);
+ char c = fgetc(F1); // expected-warning {{Read function called when stream
is in EOF state. Function has no effect}}
+ // expected-warning@-1 {{File position of the stream might be
'indeterminate' after a failed operation. Can cause undefined behavior}}
----------------
NagyDonat wrote:
Do I understand it correctly that here the checker would print a note
explaining that it assumes that `fscanf` reaches the end-of-file? Without that
this checker behavior would be difficult to understand.
https://github.com/llvm/llvm-project/pull/82476
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