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Fix ICE for repr attribute malformation #4238

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Merged
merged 1 commit into from
Oct 20, 2025
Merged

Fix ICE for repr attribute malformation #4238

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8 changes: 6 additions & 2 deletions gcc/rust/typecheck/rust-hir-type-check-base.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -412,7 +412,7 @@ TypeCheckBase::parse_repr_options (const AST::AttrVec &attrs, location_t locus)
bool is_repr = attr.get_path ().as_string () == Values::Attributes::REPR;
if (is_repr && !attr.has_attr_input ())
{
rust_error_at (attr.get_locus (), "malformed %qs attribute", "repr");
rust_error_at (attr.get_locus (), "malformed %<repr%> attribute");
continue;
}

Expand All @@ -421,7 +421,11 @@ TypeCheckBase::parse_repr_options (const AST::AttrVec &attrs, location_t locus)
const AST::AttrInput &input = attr.get_attr_input ();
bool is_token_tree = input.get_attr_input_type ()
== AST::AttrInput::AttrInputType::TOKEN_TREE;
rust_assert (is_token_tree);
if (!is_token_tree)
{
rust_error_at (attr.get_locus (), "malformed %<repr%> attribute");
continue;
}
const auto &option = static_cast<const AST::DelimTokenTree &> (input);
AST::AttrInputMetaItemContainer *meta_items
= option.parse_to_meta_item ();
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6 changes: 6 additions & 0 deletions gcc/testsuite/rust/compile/issue-4231.rs
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@@ -0,0 +1,6 @@
#[repr = ""] // { dg-error "malformed .repr. attribute" }
struct ThreeInts {
first: i16,
second: i8,
third: i32
}
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