Always add `-Z incremental-info` to incremental compilation tests.

diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index ae8e82e4e2f60e36639358d9fa062381431fbe75..c5413e3722830ce4a14540ff2158d88ba0f3e747 100644 (file)
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -2012,6 +2012,7 @@ fn run_incremental_test(&self) {
         // Add an extra flag pointing at the incremental directory.
         let mut revision_props = self.props.clone();
         revision_props.incremental_dir = Some(incremental_dir);
+        revision_props.compile_flags.push(String::from("-Zincremental-info"));
 
         let revision_cx = TestCx {
             config: self.config,