Rollup merge of #106816 - TimNN:rental-remap, r=oli-obj

Update `rental` hack to work with remapped paths.

This PR simply switches to an already-existing helper instead of hard-coding a specific enum variant. The new revision of the test fails without the other changes in this PR.

Context: I'm exploring running UI tests with remapped paths by default in #105924 and the rental test was one of the ones that failed.

This may also be useful in the context of https://github.com/rust-lang/rfcs/pull/3127 ("New rustc and Cargo options to allow path sanitisation by default").

1 files changed, 6 insertions, 4 deletions

diff --git a/compiler/rustc_expand/src/base.rs b/compiler/rustc_expand/src/base.rs
index 00453f78287..ffde8480c02 100644
--- a/compiler/rustc_expand/src/base.rs
+++ b/compiler/rustc_expand/src/base.rs
@@ -31,11 +31,11 @@ use rustc_span::edition::Edition;
 use rustc_span::hygiene::{AstPass, ExpnData, ExpnKind, LocalExpnId};
 use rustc_span::source_map::SourceMap;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
-use rustc_span::{BytePos, FileName, RealFileName, Span, DUMMY_SP};
+use rustc_span::{BytePos, FileName, Span, DUMMY_SP};
 use smallvec::{smallvec, SmallVec};
 
 use std::iter;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::rc::Rc;
 
 pub(crate) use rustc_span::hygiene::MacroKind;
@@ -1423,8 +1423,10 @@ fn pretty_printing_compatibility_hack(item: &Item, sess: &ParseSess) -> bool {
             if let [variant] = &*enum_def.variants {
                 if variant.ident.name == sym::Input {
                     let filename = sess.source_map().span_to_filename(item.ident.span);
-                    if let FileName::Real(RealFileName::LocalPath(path)) = filename {
-                        if let Some(c) = path
+                    if let FileName::Real(real) = filename {
+                        if let Some(c) = real
+                            .local_path()
+                            .unwrap_or(Path::new(""))
                             .components()
                             .flat_map(|c| c.as_os_str().to_str())
                             .find(|c| c.starts_with("rental") || c.starts_with("allsorts-rental"))