hush: fix handling of heredocs starting with empty lines

function                                             old     new   delta
parse_stream                                        2748    2759     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 4fdd15900..89e06df4d 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -4226,6 +4226,14 @@ static char *fetch_till_str(o_string *as_string,
         int prev = 0; /* not \ */
         int ch;
 
+        /* Starting with "" is necessary for this case:
+         * cat <<EOF
+         *
+         * xxx
+         * EOF
+         */
+        heredoc.data = xzalloc(1); /* start as "", not as NULL */
+
         goto jump_in;
 
         while (1) {