[perl #126238] LTM does not seem to apply within metaoperators, or does not take new operators in account.

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LTM does not seem to apply within metaoperators, or does not take new operators 
in account.
Discussion http://irclog.perlgeek.de/perl6/2015-10-01#i_11304291

cognominal      m: my token infix:sym<--\>> { "$^a -> $^b\n" }; [~] 'a' X[-->] 
<b c>
camelia rakudo-moar 92be57: OUTPUT«5===SORRY!5=== Error while compiling 
/tmp/XLcJTzbXjy␤Prefix -- requires an argument, but no valid term 
found␤a/XLcJTzbXjy:1␤------> 3m<--\>> { "$^a -> $^b\n" }; [~] 'a' X[--7⏏5>] <b 
c>␤    expecting any of:␤        prefix␤»
moritz  aka "no" :-)
        m:  sub arrow { "$^a -> $^b\n" }; [~] 'a' X[&arrow] <b c>
camelia rakudo-moar 92be57: ( no output )
cognominal      m:  sub arrow { "$^a -> $^b\n" }; say [~] 'a' X[&arrow] <b c>
camelia rakudo-moar 92be57: OUTPUT«a -> b␤a -> c␤␤»
lichtkind       moritz: something like problem-solver-tutorial ? so we have 
still ame spaces for other tuts
lizmat  m: my token infix:sym«-->» { "$^a -> $^b\n" }; [~] 'a' X[-->] <b c>
camelia rakudo-moar 92be57: OUTPUT«5===SORRY!5=== Error while compiling 
/tmp/geTg5LpEb8␤Prefix -- requires an argument, but no valid term 
found␤a/geTg5LpEb8:1␤------> 3ym«-->» { "$^a -> $^b\n" }; [~] 'a' X[--7⏏5>] <b 
c>␤    expecting any of:␤        prefix␤»
lizmat  cognominal: feels like a rakudobuggable thing to me