diff --git a/src/librustc_trans/common.rs b/src/librustc_trans/common.rs
index 7aceb0b88bb1..093e57816b96 100644
--- a/src/librustc_trans/common.rs
+++ b/src/librustc_trans/common.rs
@@ -300,10 +300,6 @@ pub struct FunctionContext<'a, 'tcx: 'a> {
     // substitutions used.
     pub param_substs: &'tcx Substs<'tcx>,
 
-    // The source span and nesting context where this function comes from, for
-    // error reporting and symbol generation.
-    pub span: Option<Span>,
-
     // This function's enclosing crate context.
     pub ccx: &'a CrateContext<'a, 'tcx>,
 
@@ -360,7 +356,6 @@ impl<'a, 'tcx> FunctionContext<'a, 'tcx> {
             landingpad_alloca: Cell::new(None),
             fn_ty: fn_ty,
             param_substs: param_substs,
-            span: None,
             ccx: ccx,
             debug_context: debug_context,
             owned_builder: OwnedBuilder::new_with_ccx(ccx),
diff --git a/src/librustc_trans/mir/mod.rs b/src/librustc_trans/mir/mod.rs
index 7ceba69c3719..15683a6bb15d 100644
--- a/src/librustc_trans/mir/mod.rs
+++ b/src/librustc_trans/mir/mod.rs
@@ -372,7 +372,7 @@ fn arg_local_refs<'bcx, 'tcx>(bcx: &BlockAndBuilder<'bcx, 'tcx>,
                 declare_local(bcx, arg_decl.name.unwrap_or(keywords::Invalid.name()),
                               arg_ty, scope, variable_access,
                               VariableKind::ArgumentVariable(arg_index + 1),
-                              bcx.fcx().span.unwrap_or(DUMMY_SP));
+                              DUMMY_SP);
             });
 
             return LocalRef::Lvalue(LvalueRef::new_sized(lltemp, LvalueTy::from_ty(arg_ty)));
@@ -444,7 +444,7 @@ fn arg_local_refs<'bcx, 'tcx>(bcx: &BlockAndBuilder<'bcx, 'tcx>,
                 declare_local(bcx, arg_decl.name.unwrap_or(keywords::Invalid.name()), arg_ty,
                               scope, VariableAccess::DirectVariable { alloca: llval },
                               VariableKind::ArgumentVariable(arg_index + 1),
-                              bcx.fcx().span.unwrap_or(DUMMY_SP));
+                              DUMMY_SP);
                 return;
             }
 
@@ -513,7 +513,7 @@ fn arg_local_refs<'bcx, 'tcx>(bcx: &BlockAndBuilder<'bcx, 'tcx>,
                 };
                 declare_local(bcx, decl.debug_name, ty, scope, variable_access,
                               VariableKind::CapturedVariable,
-                              bcx.fcx().span.unwrap_or(DUMMY_SP));
+                              DUMMY_SP);
             }
         });
         LocalRef::Lvalue(LvalueRef::new_sized(llval, LvalueTy::from_ty(arg_ty)))