rustc: Fail fast when compiling a source file larger than 4 GiB

tyilo · tyilo · commit e73d9748c61b · 2024-11-08T22:51:49.000+01:00
diff --git a/compiler/rustc_span/src/source_map.rs b/compiler/rustc_span/src/source_map.rs
@@ -115,6 +115,10 @@ impl FileLoader for RealFileLoader {
     }
 
     fn read_file(&self, path: &Path) -> io::Result<String> {
+        if path.metadata().is_ok_and(|metadata| metadata.len() > u32::MAX.into()) {
+            eprintln!("fatal error: rustc does not support files larger than 4GB");
+            crate::fatal_error::FatalError.raise()
+        }
         fs::read_to_string(path)
     }
 

Original file line number	Diff line number	Diff line change
`@@ -115,6 +115,10 @@ impl FileLoader for RealFileLoader {`
`115`	`115`	`}`
`116`	`116`
`117`	`117`	`fn read_file(&self, path: &Path) -> io::Result<String> {`
	`118`	`+ if path.metadata().is_ok_and(\|metadata\| metadata.len() > u32::MAX.into()) {`
	`119`	`+ eprintln!("fatal error: rustc does not support files larger than 4GB");`
	`120`	`+ crate::fatal_error::FatalError.raise()`
	`121`	`+ }`
`118`	`122`	`fs::read_to_string(path)`
`119`	`123`	`}`
`120`	`124`