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more checks for SwitchInt

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This commit is contained in:
Ralf Jung 2020-05-31 15:07:16 +02:00
parent e07e42433f
commit 9a4bdbff9e
1 changed files with 7 additions and 3 deletions
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10
src/librustc_mir/transform/validate.rs
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@ -90,11 +90,15 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
TerminatorKind::Goto { target } => {
self.check_bb(terminator.source_info.span, *target);
}
TerminatorKind::SwitchInt { targets, .. } => {
if targets.is_empty() {
TerminatorKind::SwitchInt { targets, values, .. } => {
if targets.len() != values.len() + 1 {
self.fail(
terminator.source_info.span,
"encountered `SwitchInt` terminator with no target to jump to",
format!(
"encountered `SwitchInt` terminator with {} values, but {} targets (should be values+1)",
values.len(),
targets.len(),
),
);
}
for target in targets {