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don't ICE on variadic function calls

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This commit is contained in:
Ralf Jung 2021-12-06 17:58:24 -05:00
parent b815532674
commit a97f41fd69
1 changed files with 9 additions and 2 deletions
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11
compiler/rustc_const_eval/src/interpret/terminator.rs
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@ -331,8 +331,15 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// `find_mir_or_eval_fn`.
// FIXME: for variadic support, do we have to somehow determine calle's extra_args?
let callee_fn_abi = self.fn_abi_of_instance(instance, ty::List::empty())?;
assert!(!callee_fn_abi.c_variadic);
assert!(!caller_fn_abi.c_variadic);
if callee_fn_abi.c_variadic != caller_fn_abi.c_variadic {
throw_ub_format!(
"calling a c-variadic function via a non-variadic call site, or vice versa"
);
}
if callee_fn_abi.c_variadic {
throw_unsup_format!("calling a c-variadic function is not supported");
}
if M::enforce_abi(self) {
if caller_fn_abi.conv != callee_fn_abi.conv {