Don't leave is_block in bad state after bad redirection

Fixes #1728.

1 files changed, 3 insertions, 3 deletions

diff --git a/exec.cpp b/exec.cpp
index 60b46ab9..e282f72f 100644
--- a/exec.cpp
+++ b/exec.cpp
@@ -516,9 +516,6 @@ static void internal_exec_helper(parser_t &parser,
     std::vector<int> opened_fds;
     bool transmorgrified = io_transmogrify(ios, &morphed_chain, &opened_fds);
 
-    int is_block_old=is_block;
-    is_block=1;
-
     /*
       Did the transmogrification fail - if so, set error status and return
     */
@@ -528,6 +525,9 @@ static void internal_exec_helper(parser_t &parser,
         return;
     }
 
+    int is_block_old=is_block;
+    is_block=1;
+
     signal_unblock();
 
     if (node_offset == NODE_OFFSET_INVALID)