Cache::Cascade distributes "both", a .pm file and a .pmc file. And the file Cache/Cascade.pm contains the line 

use tt ( methods => [qw/size count/] );

[download]

So I suggest you contact nothingmuch about building his module. It seems that the .pmc is the macro-expanded version of Cache::Cascade, as generated by Module::Compile, but it further seems to me that his installation process does not install .pmc files properly.

In reply to Re: Cache::Cascade, weird trouble installing via cpan by Corion
in thread Cache::Cascade, weird trouble installing via cpan by isync

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