diff --git a/src/test/incremental/auxiliary/rustc-rust-log-aux.rs b/src/test/incremental/auxiliary/rustc-rust-log-aux.rs
new file mode 100644
index 00000000000..a361373dc19
--- /dev/null
+++ b/src/test/incremental/auxiliary/rustc-rust-log-aux.rs
@@ -0,0 +1,8 @@
+// rustc-env:RUSTC_LOG=debug
+#[cfg(rpass1)]
+pub fn foo() {}
+
+#[cfg(rpass2)]
+pub fn foo() {
+    println!();
+}
diff --git a/src/test/incremental/rustc-rust-log.rs b/src/test/incremental/rustc-rust-log.rs
new file mode 100644
index 00000000000..566f0d96d97
--- /dev/null
+++ b/src/test/incremental/rustc-rust-log.rs
@@ -0,0 +1,16 @@
+// revisions: rpass1 rpass2
+// This test is just checking that we won't ICE if logging is turned
+// on; don't bother trying to compare that (copious) output.
+//
+// dont-check-compiler-stdout
+// dont-check-compiler-stderr
+// aux-build: rustc-rust-log-aux.rs
+// rustc-env:RUSTC_LOG=debug
+
+#[cfg(rpass1)]
+fn main() {}
+
+#[cfg(rpass2)]
+fn main() {
+    println!();
+}