Allow noreply mixed with 0 delay.

memcached.c

@@ -2882,15 +2882,19 @@ static void process_delete_command(conn *c, token_t *tokens, const size_t ntoken
 
     assert(c != NULL);
 
-    if (ntokens == 4) {
-        if (strcmp(tokens[KEY_TOKEN+1].value, "0") != 0
-            && !set_noreply_maybe(c, tokens, ntokens)) {
+    if (ntokens > 3) {
+        bool hold_is_zero = strcmp(tokens[KEY_TOKEN+1].value, "0") == 0;
+        bool sets_noreply = set_noreply_maybe(c, tokens, ntokens);
+        bool valid = (ntokens == 4 && (hold_is_zero || sets_noreply))
+            || (ntokens == 5 && hold_is_zero && sets_noreply);
+        if (!valid) {
             out_string(c, "CLIENT_ERROR bad command line format.  "
                        "Usage: delete <key> [noreply]");
             return;
         }
     }
 
+
     key = tokens[KEY_TOKEN].value;
     nkey = tokens[KEY_TOKEN].length;
 
@@ -2994,7 +2998,7 @@ static void process_command(conn *c, char *command) {
 
         process_arithmetic_command(c, tokens, ntokens, 0);
 
-    } else if (ntokens >= 3 && ntokens <= 4 && (strcmp(tokens[COMMAND_TOKEN].value, "delete") == 0)) {
+    } else if (ntokens >= 3 && ntokens <= 5 && (strcmp(tokens[COMMAND_TOKEN].value, "delete") == 0)) {
 
         process_delete_command(c, tokens, ntokens);
 

t/issue_108.t

@@ -1,7 +1,7 @@
 #!/usr/bin/perl
 
 use strict;
-use Test::More tests => 3;
+use Test::More tests => 4;
 use FindBin qw($Bin);
 use lib "$Bin/lib";
 use MemcachedTest;
@@ -18,3 +18,10 @@ is (scalar <$sock>, "DELETED\r\n", "Properly deleted with 0");
 
 print $sock "add $key 0 0 1\r\nx\r\n";
 is (scalar <$sock>, "STORED\r\n", "Added again a key");
+
+print $sock "delete $key 0 noreply\r\n";
+# will not reply, but a subsequent add will succeed
+
+print $sock "add $key 0 0 1\r\nx\r\n";
+is (scalar <$sock>, "STORED\r\n", "Add succeeded after quiet deletion.");
+

t/issue_3.t

@@ -1,7 +1,7 @@
 #!/usr/bin/perl
 
 use strict;
-use Test::More tests => 7;
+use Test::More tests => 8;
 use FindBin qw($Bin);
 use lib "$Bin/lib";
 use MemcachedTest;
@@ -17,8 +17,15 @@ print $sock "delete $key 10\r\n";
 is (scalar <$sock>, "CLIENT_ERROR bad command line format."
     . "  Usage: delete <key> [noreply]\r\n", "invalid delete");
 
+print $sock "add $key 0 0 1\r\nx\r\n";
+is (scalar <$sock>, "STORED\r\n", "Add before a broken delete.");
+
 print $sock "delete $key 10 noreply\r\n";
-is (scalar <$sock>, "ERROR\r\n", "Even more invalid delete");
+# Does not reply
+# is (scalar <$sock>, "ERROR\r\n", "Even more invalid delete");
+
+print $sock "add $key 0 0 1\r\nx\r\n";
+is (scalar <$sock>, "NOT_STORED\r\n", "Failed to add after failed silent delete.");
 
 print $sock "delete $key noreply\r\n";
 # Will not reply, so let's do a set and check that.