[bug] [ir] Fix Block::replace_with segment faults when stmts.size() =…

…= 0 (#1072)
taichi-dev · May 31, 2020 · e73d647 · e73d647
1 parent e8c1ff8
commit e73d647
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/taichi/ir/ir.cpp b/taichi/ir/ir.cpp
@@ -757,7 +757,7 @@ void Block::replace_with(Stmt *old_statement,
     }
   }
   TI_ASSERT(location != -1);
-  if (replace_usages)
+  if (replace_usages && !new_statements.stmts.empty())
     old_statement->replace_with(new_statements.back().get());
   trash_bin.push_back(std::move(statements[location]));
   if (new_statements.size() == 1) {