Fix ICE with let...else and ref mut · Dylan-DPC/rust@bf7c32a (original) (raw)
`@@ -45,12 +45,12 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
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`let item_msg;
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`let reason;
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`let mut opt_source = None;
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``
`-
let access_place_desc = self.describe_place(access_place.as_ref());
`
``
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`+
let access_place_desc = self.describe_any_place(access_place.as_ref());
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`debug!("report_mutability_error: access_place_desc={:?}", access_place_desc);
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``
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`match the_place_err {
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`PlaceRef { local, projection: [] } => {
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``
`` -
item_msg = format!("{}", access_place_desc.unwrap());
``
``
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`+
item_msg = access_place_desc;
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`if access_place.as_local().is_some() {
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` reason = ", as it is not declared as mutable".to_string();
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`} else {
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`@@ -83,7 +83,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
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`// If we deref an immutable ref then the suggestion here doesn't help.
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`return;
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`} else {
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``
`` -
item_msg = format!("{}", access_place_desc.unwrap());
``
``
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`+
item_msg = access_place_desc;
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`if self.is_upvar_field_projection(access_place.as_ref()).is_some() {
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` reason = ", as it is not declared as mutable".to_string();
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`} else {
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`@@ -96,17 +96,17 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
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`PlaceRef { local, projection: [ProjectionElem::Deref] }
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`if self.body.local_decls[local].is_ref_for_guard() =>
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`{
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``
`` -
item_msg = format!("{}", access_place_desc.unwrap());
``
``
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`+
item_msg = access_place_desc;
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` reason = ", as it is immutable for the pattern guard".to_string();
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`}
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`PlaceRef { local, projection: [ProjectionElem::Deref] }
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`if self.body.local_decls[local].is_ref_to_static() =>
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`{
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`if access_place.projection.len() == 1 {
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``
`` -
item_msg = format!("immutable static item {}", access_place_desc.unwrap());
``
``
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`+
item_msg = format!("immutable static item {}", access_place_desc);
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` reason = String::new();
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`} else {
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``
`` -
item_msg = format!("{}", access_place_desc.unwrap());
``
``
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`+
item_msg = access_place_desc;
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`let local_info = &self.body.local_decls[local].local_info;
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`if let Some(box LocalInfo::StaticRef { def_id, .. }) = *local_info {
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`let static_name = &self.infcx.tcx.item_name(def_id);
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`@@ -121,7 +121,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
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` && proj_base.is_empty()
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` && !self.upvars.is_empty()
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`{
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``
`` -
item_msg = format!("{}", access_place_desc.unwrap());
``
``
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`+
item_msg = access_place_desc;
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`debug_assert!(
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`self.body.local_decls[ty::CAPTURE_STRUCT_LOCAL].ty.is_region_ptr()
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`);
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`@@ -147,7 +147,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
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`});
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`let pointer_type = source.describe_for_immutable_place(self.infcx.tcx);
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` opt_source = Some(source);
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``
`-
if let Some(desc) = access_place_desc {
`
``
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`+
if let Some(desc) = self.describe_place(access_place.as_ref()) {
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`` item_msg = format!("{}", desc);
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` reason = match error_access {
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`AccessKind::Mutate => format!(", which is behind {}", pointer_type),
`