[Bug fortran/66493] ICE on alternate return argument for typebound procedure

[gerhard.steinmetz.fort...@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66493

--- Comment #8 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> 
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Case zarc1_2_pass.f90 should be definitely illegal code.