Fix ICE #3717

flip1995 · flip1995 · commit f204b7ec767b · 2019-02-17T01:50:13.000+01:00
Restore the old `TypeckTables` in visit_body after walking the body
diff --git a/clippy_lints/src/types.rs b/clippy_lints/src/types.rs
@@ -2239,8 +2239,10 @@ impl<'a, 'b, 'tcx: 'a + 'b> ImplicitHasherConstructorVisitor<'a, 'b, 'tcx> {
 
 impl<'a, 'b, 'tcx: 'a + 'b> Visitor<'tcx> for ImplicitHasherConstructorVisitor<'a, 'b, 'tcx> {
     fn visit_body(&mut self, body: &'tcx Body) {
+        let prev_body = self.body;
         self.body = self.cx.tcx.body_tables(body.id());
         walk_body(self, body);
+        self.body = prev_body;
     }
 
     fn visit_expr(&mut self, e: &'tcx Expr) {

Original file line number	Diff line number	Diff line change
`@@ -2239,8 +2239,10 @@ impl<'a, 'b, 'tcx: 'a + 'b> ImplicitHasherConstructorVisitor<'a, 'b, 'tcx> {`
`2239`	`2239`
`2240`	`2240`	`impl<'a, 'b, 'tcx: 'a + 'b> Visitor<'tcx> for ImplicitHasherConstructorVisitor<'a, 'b, 'tcx> {`
`2241`	`2241`	`fn visit_body(&mut self, body: &'tcx Body) {`
	`2242`	`+ let prev_body = self.body;`
`2242`	`2243`	`self.body = self.cx.tcx.body_tables(body.id());`
`2243`	`2244`	`walk_body(self, body);`
	`2245`	`+ self.body = prev_body;`
`2244`	`2246`	`}`
`2245`	`2247`
`2246`	`2248`	`fn visit_expr(&mut self, e: &'tcx Expr) {`