[metapost] Command "show" on a non-empty "path" makes mpost(1) return with error code 1

[Akira Kakuto]

Hi,

> I think it's a bug.

That is not a bug and is intentional:

If
show sometning;
is meaningful, the function
mp_begin_diagnostic() is called and
history (exit value) is set to 1.

Best,
Akira