[PATCH] bug 23124: rust - Fix null deref when casting

[Dan Robertson <danlrobertson89@gmail.com>]

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Attached a patch that fixes bug 23124.

Cheers,

Dan

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From 7ebef0f7305cfe9bc56bf658dc889abf2da4ee02 Mon Sep 17 00:00:00 2001
From: Dan Robertson <danlrobertson89@gmail.com>
Date: Sat, 28 Apr 2018 03:18:00 +0000
Subject: [PATCH] bug 23124: rust - Fix null deref when casting

Fix a null dereference when casting a value to a unit type.
---
 gdb/rust-exp.y | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/gdb/rust-exp.y b/gdb/rust-exp.y
index b661a803e3..4be01b0719 100644
--- a/gdb/rust-exp.y
+++ b/gdb/rust-exp.y
@@ -2007,8 +2007,11 @@ convert_params_to_types (struct parser_state *state, rust_op_vector *params)
 {
   std::vector<struct type *> result;
 
-  for (const rust_op *op : *params)
-    result.push_back (convert_ast_to_type (state, op));
+  if (params) {
+    for (const rust_op *op : *params) {
+      result.push_back (convert_ast_to_type (state, op));
+    }
+  }
 
   return result;
 }
-- 
2.17.0


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