[bug #66499] Parameter for option -j seems not to be validated and can cause hangs

Follow-up Comment #5, bug #66499 (group make):

Tested on sun 64 and 32 bits and linux 64 and 32 bits.
Here is an example


$ ls
makefile
$ cat makefile
all:; $(info hello, world)
$ make -j688888
make: warning: number of jobs is limited to 16384
hello, world
make: 'all' is up to date.
$ make -j688888 --jobserver-style=pipe
make: warning: number of jobs is limited to 16384
hello, world
make: 'all' is up to date.


On top of the new test in the attached patch, i'd like to add the following
test


diff --git a/tests/scripts/features/jobserver
b/tests/scripts/features/jobserver
index 3c8a2865..d2795df9 100644
--- a/tests/scripts/features/jobserver
+++ b/tests/scripts/features/jobserver
@@ -216,6 +216,10 @@ if ($port_type eq 'UNIX') {
     run_make_test(q!
 all:; $(info hello, world)
     !, '-j688777', "/hello, world/");
+
+    run_make_test(q!
+all:; $(info hello, world)
+    !, '-j688777 --jobserver-style=pipe', "/hello, world/");
 }

 1;




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