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Do not emit empty suggestion

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The `println!();` statement's span doesn't include the `;`, and the modified suggestions where trying to get the `;` by getting the differenece between the statement's and the expression's spans, which was an empty suggestion.

Fix #133833, fix #133834.
This commit is contained in:
Esteban Küber 2024-12-04 05:57:55 +00:00
parent 490b2cc098
commit 1b449e123d
4 changed files with 89 additions and 1 deletions
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8
compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs
View file

@ -3394,7 +3394,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let Some(ty) = self.node_ty_opt(tail_expr.hir_id) else {
return;
};
if self.can_eq(self.param_env, expected_ty, ty) {
if self.can_eq(self.param_env, expected_ty, ty)
// FIXME: this happens with macro calls. Need to figure out why the stmt
// `println!();` doesn't include the `;` in its `Span`. (#133845)
// We filter these out to avoid ICEs with debug assertions on caused by
// empty suggestions.
&& stmt.span.hi() != tail_expr.span.hi()
{
err.span_suggestion_short(
stmt.span.with_lo(tail_expr.span.hi()),
"remove this semicolon",

6
compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs
View file

@ -3838,6 +3838,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
&& self.predicate_must_hold_modulo_regions(&Obligation::misc(
tcx, expr.span, body_id, param_env, pred,
))
&& expr.span.hi() != rcvr.span.hi()
{
err.span_suggestion_verbose(
expr.span.with_lo(rcvr.span.hi()),
@ -4115,6 +4116,11 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
// the expected is a projection that we need to resolve.
// && let Some(tail_ty) = typeck_results.expr_ty_opt(expr)
&& expected_found.found.is_unit()
// FIXME: this happens with macro calls. Need to figure out why the stmt
// `println!();` doesn't include the `;` in its `Span`. (#133845)
// We filter these out to avoid ICEs with debug assertions on caused by
// empty suggestions.
&& expr.span.hi() != stmt.span.hi()
{
err.span_suggestion_verbose(
expr.span.shrink_to_hi().with_hi(stmt.span.hi()),