awk: Syntax error if delete isn't given an arg.

Unlike exit and return, delete strictly requires an arg, and derefs a
null pointer if executed without one.

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/testsuite/awk.tests b/testsuite/awk.tests
index 9f353fc10..03fedf771 100755
--- a/testsuite/awk.tests
+++ b/testsuite/awk.tests
@@ -336,10 +336,13 @@ testing "awk continue" \
 	'BEGIN { if (1) continue; else a = 1 }'
 
 testing "awk handles invalid for loop" \
-    "awk '{ for() }' 2>&1" "awk: cmd. line:1: Unexpected token\n" "" ""
+	"awk -e '{ for() }' 2>&1" "awk: cmd. line:1: Unexpected token\n" "" ""
 
 testing "awk handles colon not preceded by ternary" \
-    "awk 'foo:bar:' 2>&1" "awk: cmd. line:1: Unexpected token\n" "" ""
+	"awk -e foo:bar: 2>&1" "awk: cmd. line:1: Unexpected token\n" "" ""
+
+testing "awk errors on missing delete arg" \
+	"awk -e '{delete}' 2>&1" "awk: cmd. line:1: Too few arguments\n" "" ""
 
 # testing "description" "command" "result" "infile" "stdin"
 testing 'awk negative field access' \