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fix: Panic while rendering function with impl trait arg

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This commit is contained in:
Shoyu Vanilla 2024-08-08 22:03:31 +09:00
parent 34d9409211
commit aa62c9d664
2 changed files with 27 additions and 4 deletions
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8
crates/hir-ty/src/display.rs
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@ -1022,16 +1022,16 @@ impl HirDisplay for Ty {
// We print all params except implicit impl Trait params. Still a bit weird; should we leave out parent and self?
if parameters.len() - impl_ > 0 {
// `parameters` are in the order of fn's params (including impl traits), fn's lifetimes
let without_impl = self_param as usize + type_ + const_ + lifetime;
// parent's params (those from enclosing impl or trait, if any).
let (fn_params, other) =
parameters.split_at(self_param as usize + type_ + const_ + lifetime);
let (_impl, parent_params) = other.split_at(impl_);
let (fn_params, parent_params) = parameters.split_at(without_impl + impl_);
debug_assert_eq!(parent_params.len(), parent_len);
let parent_params =
generic_args_sans_defaults(f, Some(generic_def_id), parent_params);
let fn_params =
generic_args_sans_defaults(f, Some(generic_def_id), fn_params);
&generic_args_sans_defaults(f, Some(generic_def_id), fn_params)
[0..without_impl];
write!(f, "<")?;
hir_fmt_generic_arguments(f, parent_params, None)?;