rewrite and rename issue-85019-moved-src-dir to rmake

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -65,7 +65,6 @@ run-make/issue-69368/Makefile
 run-make/issue-83045/Makefile
 run-make/issue-83112-incr-test-moved-file/Makefile
 run-make/issue-84395-lto-embed-bitcode/Makefile
-run-make/issue-85019-moved-src-dir/Makefile
 run-make/issue-85401-static-mir/Makefile
 run-make/issue-88756-default-output/Makefile
 run-make/issue-97463-abi-param-passing/Makefile

tests/run-make/moved-src-dir-fingerprint-ice/rmake.rs

@@ -0,0 +1,38 @@
+// A SourceFile created during compilation may have a relative
+// path (e.g. if rustc itself is invoked with a relative path).
+// When we write out crate metadata, we convert all relative paths
+// to absolute paths using the current working directory.
+// However, the working directory was previously not included in the crate hash.
+// This meant that the crate metadata could change while the crate
+// hash remained the same. Among other problems, this could cause a
+// fingerprint mismatch ICE, since incremental compilation uses
+// the crate metadata hash to determine if a foreign query is green.
+// This test checks that we don't get an ICE when the working directory
+// (but not the build directory!) changes between compilation
+// sessions.
+// See https://github.com/rust-lang/rust/issues/85019
+
+//@ ignore-none
+// Reason: no-std is not supported
+//@ ignore-nvptx64-nvidia-cuda
+// FIXME: can't find crate for 'std'
+
+use run_make_support::{fs_wrapper, rust_lib_name, rustc};
+
+fn main() {
+    fs_wrapper::create_dir("incr");
+    fs_wrapper::create_dir("first_src");
+    fs_wrapper::create_dir("output");
+    fs_wrapper::rename("my_lib.rs", "first_src/my_lib.rs");
+    fs_wrapper::rename("main.rs", "first_src/main.rs");
+    // Build from "first_src"
+    std::env::set_current_dir("first_src").unwrap();
+    rustc().input("my_lib.rs").incremental("incr").crate_type("lib").run();
+    rustc().input("main.rs").incremental("incr").extern_("my_lib", rust_lib_name("my_lib")).run();
+    std::env::set_current_dir("..").unwrap();
+    fs_wrapper::rename("first_src", "second_src");
+    std::env::set_current_dir("second_src").unwrap();
+    // Build from "second_src" - the output and incremental directory remain identical
+    rustc().input("my_lib.rs").incremental("incr").crate_type("lib").run();
+    rustc().input("main.rs").incremental("incr").extern_("my_lib", rust_lib_name("my_lib")).run();
+}