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-rw-r--r--src/shared/ptyfwd.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/shared/ptyfwd.c b/src/shared/ptyfwd.c
index 6ffe86e..21cfe1d 100644
--- a/src/shared/ptyfwd.c
+++ b/src/shared/ptyfwd.c
@@ -406,6 +406,9 @@ int pty_forward_new(
struct winsize ws;
int r;
+ assert(master >= 0);
+ assert(ret);
+
f = new(PTYForward, 1);
if (!f)
return -ENOMEM;