let end = je.sm.lookup_char_pos(span.hi());
let backtrace_step = backtrace.next().map(|bt| {
let call_site = Self::from_span_full(bt.call_site, false, None, None, backtrace, je);
- let def_site_span =
- Self::from_span_full(bt.def_site, false, None, None, [].into_iter(), je);
+ let def_site_span = Self::from_span_full(
+ je.sm.guess_head_span(bt.def_site),
+ false,
+ None,
+ None,
+ [].into_iter(),
+ je,
+ );
Box::new(DiagnosticSpanMacroExpansion {
span: call_site,
macro_decl_name: bt.kind.descr(),