Rollup merge of #107700 - jyn514:tools-builder, r=Mark-Simulacrum

[rust.git] / compiler / rustc_error_codes / src / error_codes / E0464.md

diff --git a/compiler/rustc_error_codes/src/error_codes/E0464.md b/compiler/rustc_error_codes/src/error_codes/E0464.md
index 9108d856c9d7724f557b243130917c9bcca19cc5..209cbb00db562f3daa36e38d79b58e70c938828f 100644 (file)
--- a/compiler/rustc_error_codes/src/error_codes/E0464.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0464.md
@@ -1,6 +1,21 @@
 The compiler found multiple library files with the requested crate name.
 
+```compile_fail
+// aux-build:crateresolve-1.rs
+// aux-build:crateresolve-2.rs
+// aux-build:crateresolve-3.rs
+
+extern crate crateresolve;
+//~^ ERROR multiple candidates for `rlib` dependency `crateresolve` found
+
+fn main() {}
+```
+
 This error can occur in several different cases -- for example, when using
 `extern crate` or passing `--extern` options without crate paths. It can also be
 caused by caching issues with the build directory, in which case `cargo clean`
 may help.
+
+In the above example, there are three different library files, all of which
+define the same crate name. Without providing a full path, there is no way for
+the compiler to know which crate it should use.