When parsing an invalid pre- or post-decrement expression as first
statement of a source buffer, the compiler crashed while attempting
to look up the type of the previous instruction within a not-yet
allocated chunk buffer.

-- Expect stderr --
Syntax error: Unterminated string
In line 1, byte 6:

 `{% ++"`
       ^-- Near here


-- End --

-- Testcase --
{% ++"
-- End --