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-rw-r--r--src/librustc_middle/arena.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/librustc_middle/arena.rs b/src/librustc_middle/arena.rs
index 9b9207312e8..d5212ec5c30 100644
--- a/src/librustc_middle/arena.rs
+++ b/src/librustc_middle/arena.rs
@@ -82,6 +82,8 @@ macro_rules! arena_types {
             // (during lowering) and the `librustc_middle` arena (for decoding MIR)
             [decode] asm_template: rustc_ast::ast::InlineAsmTemplatePiece,
 
+            // This is used to decode the &'tcx [Span] for InlineAsm's line_spans.
+            [decode] span: rustc_span::Span,
         ], $tcx);
     )
 }