Ensure we emit an allocator shim when only some crate types need one

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/ui/linking/mixed-allocator-shim.rs b/tests/ui/linking/mixed-allocator-shim.rs
new file mode 100644
index 00000000000..b81fbdc5205
--- /dev/null
+++ b/tests/ui/linking/mixed-allocator-shim.rs
@@ -0,0 +1,15 @@
+//@ build-pass
+//@ compile-flags: --crate-type staticlib,dylib -Zstaticlib-prefer-dynamic
+//@ no-prefer-dynamic
+
+// Test that compiling for multiple crate types in a single compilation with
+// mismatching allocator shim requirements doesn't result in the allocator shim
+// missing entirely.
+// In this particular test the dylib crate type will statically link libstd and
+// thus need an allocator shim, while the staticlib crate type will dynamically
+// link libstd and thus not need an allocator shim.
+// The -Zstaticlib-prefer-dynamic flag could be avoided by doing it the other
+// way around, but testing that the staticlib correctly has the allocator shim
+// in that case would require a run-make test instead.
+
+pub fn foo() {}