Rollup merge of #59696 - michaelwoerister:fix-issue-59137, r=alexcrichton

Remove invalid assertion back:🔗:from add_upstream_rust_crates().

This removes a misplaced assertion. The function containing the assertion is actually only ever called for upstream crates that are not considered for LTO, so we don't care whether upstream code has been merged in by LTO or not.

Fixes #59137

r? @alexcrichton

src/test/run-make-fulldeps/lto-dylib-dep/Makefile

@@ -0,0 +1,10 @@
+-include ../tools.mk
+
+# Test that we don't run into an assertion when using a Rust dylib dependency
+# while compiling with full LTO.
+# See https://github.com/rust-lang/rust/issues/59137
+
+all:
+	$(RUSTC) a_dylib.rs --crate-type=dylib -C prefer-dynamic
+	$(RUSTC) main.rs -C lto
+	$(call RUN,main)

src/test/run-make-fulldeps/lto-dylib-dep/a_dylib.rs

@@ -0,0 +1,4 @@
+
+pub fn foo() {
+    println!("bar");
+}

src/test/run-make-fulldeps/lto-dylib-dep/main.rs

@@ -0,0 +1,6 @@
+
+extern crate a_dylib;
+
+fn main() {
+    a_dylib::foo();
+}