byte-compiler does *not* complain about missing case or loop

[Jambunathan K]

1. emacs -Q
2. C-x C-f hx.el  (hx.el relies on cl but doesn't require it)
3. See the error log below.

Why is the byte-compiler silent about the "missing" `case' and `loop'?

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If this should be filed as a report, I will oblige. 

Compiling file /home/kjambunathan/.emacs.d/lisp/hx.el at Wed Mar  5 10:32:47 
2014

In hx-export:
hx.el:85:36:Warning: `t' called as a function
hx.el:197:9:Warning: reference to free variable `for'
hx.el:197:13:Warning: reference to free variable `markers'
hx.el:197:21:Warning: reference to free variable `in'
hx.el:198:13:Warning: reference to free variable `org-element-type'
hx.el:199:13:Warning: reference to free variable `hx-element-type'
hx.el:200:9:Warning: reference to free variable `collect'