fix invalid memory access in pclose

diff --git a/src/stdio/pclose.c b/src/stdio/pclose.c
index c2fe7a2..7c77796 100644 (file)
--- a/src/stdio/pclose.c
+++ b/src/stdio/pclose.c
@@ -3,8 +3,9 @@
 int pclose(FILE *f)
 {
        int status;
+       pid_t pid = f->pipe_pid;
        fclose(f);
-       while (waitpid(f->pipe_pid, &status, 0) == -1)
+       while (waitpid(pid, &status, 0) == -1)
                if (errno != EINTR) return -1;
        return status;
 }