From 006282964f1e741a58c72d8e12f872bf5c227af9 Mon Sep 17 00:00:00 2001
From: flip1995 <philipp.krones@embecosm.com>
Date: Thu, 5 May 2022 14:10:06 +0100
Subject: [PATCH] Fix ICE in EarlyAttribtues lints

---
 clippy_lints/src/attrs.rs         |  6 +++++-
 tests/ui/crashes/ice-96721.rs     | 10 ++++++++++
 tests/ui/crashes/ice-96721.stderr |  8 ++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 tests/ui/crashes/ice-96721.rs
 create mode 100644 tests/ui/crashes/ice-96721.stderr

diff --git a/clippy_lints/src/attrs.rs b/clippy_lints/src/attrs.rs
index e88087621..8b0e11cb8 100644
--- a/clippy_lints/src/attrs.rs
+++ b/clippy_lints/src/attrs.rs
@@ -6,7 +6,7 @@ use clippy_utils::msrvs;
 use clippy_utils::source::{first_line_of_span, is_present_in_source, snippet_opt, without_block_comments};
 use clippy_utils::{extract_msrv_attr, meets_msrv};
 use if_chain::if_chain;
-use rustc_ast::{AttrKind, AttrStyle, Attribute, Lit, LitKind, MetaItemKind, NestedMetaItem};
+use rustc_ast::{AttrKind, AttrStyle, Attribute, Lit, LitKind, MacArgs, MacArgsEq, MetaItemKind, NestedMetaItem};
 use rustc_errors::Applicability;
 use rustc_hir::{
     Block, Expr, ExprKind, ImplItem, ImplItemKind, Item, ItemKind, StmtKind, TraitFn, TraitItem, TraitItemKind,
@@ -593,6 +593,10 @@ fn check_empty_line_after_outer_attr(cx: &EarlyContext<'_>, item: &rustc_ast::It
         };
 
         if attr.style == AttrStyle::Outer {
+            if let MacArgs::Eq(_, MacArgsEq::Ast(expr)) = &attr_item.args
+                && !matches!(expr.kind, rustc_ast::ExprKind::Lit(..)) {
+                return;
+            }
             if attr_item.args.inner_tokens().is_empty() || !is_present_in_source(cx, attr.span) {
                 return;
             }
diff --git a/tests/ui/crashes/ice-96721.rs b/tests/ui/crashes/ice-96721.rs
new file mode 100644
index 000000000..4b3fb7640
--- /dev/null
+++ b/tests/ui/crashes/ice-96721.rs
@@ -0,0 +1,10 @@
+macro_rules! foo {
+    () => {
+        "bar.rs"
+    };
+}
+
+#[path = foo!()] //~ ERROR malformed `path` attribute
+mod abc {}
+
+fn main() {}
diff --git a/tests/ui/crashes/ice-96721.stderr b/tests/ui/crashes/ice-96721.stderr
new file mode 100644
index 000000000..78c567b8e
--- /dev/null
+++ b/tests/ui/crashes/ice-96721.stderr
@@ -0,0 +1,8 @@
+error: malformed `path` attribute input
+  --> $DIR/ice-96721.rs:7:1
+   |
+LL | #[path = foo!()] //~ ERROR malformed `path` attribute
+   | ^^^^^^^^^^^^^^^^ help: must be of the form: `#[path = "file"]`
+
+error: aborting due to previous error
+