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This paper makes it a constraint violation (instead of UB) to call va_start from a function with a fixed (non-variadic) parameter list. This is something Clang has always diagnosed as an error.
16 lines
417 B
C
16 lines
417 B
C
// RUN: %clang_cc1 -verify -std=c2y -Wall -pedantic -ffreestanding %s
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/* WG14 N3482: Yes
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* Slay Some Earthly Demons XVII
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*
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* This paper makes it a constraint violation to call va_start in a non-
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* variadic function. This is something Clang has always diagnosed.
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*/
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#include <stdarg.h>
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void func(int a) {
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va_list list;
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va_start(list, a); // expected-error {{'va_start' used in function with fixed args}}
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}
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