On Sun, Jun 23, 2019 at 02:33:10PM +0200, Peter Bex wrote: > [panic] Low-level type assertion > C_blockp((C_word)C_VAL1(C__PREV_TMPST.n1))=#t failed at chickenprob3.c:93488 > - execution terminated
Here's a minimal reproducible testcase: (define (test-it) (let loop ((done #f)) (if done '() (cons (or (read) 0.0) (loop #t))))) (print (test-it)) This generates exactly the same construct: f0=C_flonum_magnitude((C_truep(t1)?t1:lf[1])); If you type in a fixnum integer, this will break too. I've filed a bug to track this: https://bugs.call-cc.org/ticket/1624 A quick workaround for your program might be to return the 0.0 from a foreign lambda, like so: (define return-zero (foreign-lambda* float () "C_return(0.0);")) (define (test-it) (let loop ((done #f)) (if done '() (cons (or (read) (return-zero)) (loop #t))))) (print (test-it)) It's stupid, but it works. Cheers, Peter
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