Weird assert: null

[vklachkov]

I don't know what the assert should look like, but for some reason, it now outputs null instead of a clear error message.

Command:

jrsonnet -e 'local x=1, y=2; assert x == y; {}'

Current output:

assert failed: null
    <cmdline>:1:8-32: assertion failure

Expected output:

assert failed: 1 != 2
    <cmdline>:1:8-32: assertion failure

[CertainLach]

Full assert syntax is:

assert condition [ : message ] ; value

If message not specified (assert condition ; value) - it equals to null, this behavior is consistent with other jsonnet implementations.

There is no special parsing rules for assert, there is however std.assertEqual which implements special formatting for equality operation.