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-rw-r--r--compiler/rustc_interface/src/passes.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 403aea8b304..f33dcec8ba7 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -291,6 +291,7 @@ fn configure_and_expand_inner<'a>(
             trace_mac: sess.opts.debugging_opts.trace_macros,
             should_test: sess.opts.test,
             span_debug: sess.opts.debugging_opts.span_debug,
+            proc_macro_backtrace: sess.opts.debugging_opts.proc_macro_backtrace,
             ..rustc_expand::expand::ExpansionConfig::default(crate_name.to_string())
         };