keep_var_for_in: {
    options = {
        hoist_vars: true,
        unused: true
    };
    input: {
        (function(obj){
            var foo = 5;
            for (var i in obj)
                return foo;
        })();
    }
    expect: {
        (function(obj){
            var i, foo = 5;
            for (i in obj)
                return foo;
        })();
    }
}
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<div class='path'>path: <a href='/guix/log/?id=b9fae146d6cc4a6968a8eb18beef29aa1414a31e'>root</a>/<a href='/guix/log/gnu?id=b9fae146d6cc4a6968a8eb18beef29aa1414a31e'>gnu</a>/<a href='/guix/log/gnu/services?id=b9fae146d6cc4a6968a8eb18beef29aa1414a31e'>services</a>/<a href='/guix/log/gnu/services/cuirass.scm?id=b9fae146d6cc4a6968a8eb18beef29aa1414a31e'>cuirass.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/cuirass.scm?id=b9fae146d6cc4a6968a8eb18beef29aa1414a31e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-07 23:36:20 +0100'>2022-12-07</span></td><td><a href='/guix/commit/gnu/services/cuirass.scm?id=ac682963a385a44874d91052fd5845f2cc0e8f3e'>service: cuirass: Rotate remote server logs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/cuirass.scm (cuirass-log-rotations): Add the remote
server log when it is used.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-07 23:36:19 +0100'>2022-12-07</span></td><td><a href='/guix/commit/gnu/services/cuirass.scm?id=ce1f5ff6cff2a3c820c4212ae8d4c4cfa5ae949c'>services: cuirass-remote-worker: Rotate logs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/cuirass.scm (cuirass-remote-worker-log-rotations): New
procedure.
(cuirass-remote-worker-service-type): Use it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-02 00:02:12 +0100'>2022-12-02</span></td><td><a href='/guix/commit/gnu/services/cuirass.scm?id=7c1161dba4c8930d3a500a72ccaaaf50df73f466'>records: 'match-record' checks fields at macro-expansion time.</a><span class='msg-avail'>...<span class='msg-tooltip'>This allows 'match-record' to be more efficient (field offsets are
computed at compilation time) and to report unknown fields at
macro-expansion time.

* guix/records.scm (map-fields): New macro.
(define-record-type*)[rtd-identifier]: New procedure.
Define TYPE as a macro and use a separate identifier for the RTD.
(lookup-field, match-record-inner): New macros.
(match-record): Rewrite in terms of 'match-error-inner'.
* tests/records.scm ("match-record, simple")
("match-record, unknown field"): New tests.
* gnu/services/cuirass.scm (cuirass-shepherd-service): Rename 'log-file'
local variable to 'main-log-file'.
* gnu/services/getmail.scm (serialize-getmail-configuration-file): Move
after &lt;getmail-configuration-file&gt; definition.
</span></span></td><td>Ludovic Courtès</td></tr>