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-rw-r--r--src/bootstrap/bin/rustdoc.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/bootstrap/bin/rustdoc.rs b/src/bootstrap/bin/rustdoc.rs
index 4e975adc972..62037590853 100644
--- a/src/bootstrap/bin/rustdoc.rs
+++ b/src/bootstrap/bin/rustdoc.rs
@@ -57,6 +57,10 @@ fn main() {
         // This "unstable-options" can be removed when `--crate-version` is stabilized
         cmd.arg("-Z").arg("unstable-options")
            .arg("--crate-version").arg(version);
+
+        // While we can assume that `-Z unstable-options` is set, let's also force rustdoc to panic
+        // if pulldown rendering differences are found
+        cmd.arg("--deny-render-differences");
     }
 
     std::process::exit(match cmd.status() {