eeb7cb1b8a
If a user does e.g.
impl From<Bar> for foo::Foo
and get a compilation error about that `From<Bar>` is not implemented
for `Foo`, check if multiple versions of the crate with `Foo` is present
in the dependency graph. If so, give a hint about it.
I encountered this case in the wild and didn't realize I had multiple
versions of a crate in my dependency graph. So I was a bit confused at
first. This fix will make life easier for others.
46 lines
1.2 KiB
Rust
46 lines
1.2 KiB
Rust
//@ needs-target-std
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use run_make_support::{Rustc, cwd, diff, rust_lib_name, rustc};
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fn rustc_with_common_args() -> Rustc {
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let mut rustc = rustc();
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rustc.remap_path_prefix(cwd(), "$DIR");
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rustc.edition("2018"); // Don't require `extern crate`
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rustc
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}
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fn main() {
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rustc_with_common_args()
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.input("foo-v1.rs")
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.crate_type("rlib")
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.crate_name("foo")
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.extra_filename("-v1")
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.metadata("-v1")
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.run();
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rustc_with_common_args()
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.input("foo-v2.rs")
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.crate_type("rlib")
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.crate_name("foo")
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.extra_filename("-v2")
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.metadata("-v2")
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.run();
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rustc_with_common_args()
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.input("re-export-foo.rs")
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.crate_type("rlib")
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.extern_("foo", rust_lib_name("foo-v2"))
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.run();
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let stderr = rustc_with_common_args()
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.input("main.rs")
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.extern_("foo", rust_lib_name("foo-v1"))
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.extern_("re_export_foo", rust_lib_name("re_export_foo"))
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.library_search_path(cwd())
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.ui_testing()
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.run_fail()
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.stderr_utf8();
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diff().expected_file("main.stderr").normalize(r"\\", "/").actual_text("(rustc)", &stderr).run();
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}
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