[panic] Detected corrupted data in heap - execution terminated

...more...
spiffy.scm:665: chicken.base#port-closed?
spiffy.scm:665: scheme#not
spiffy.scm:666: debug!
spiffy.scm:199: debug-log
spiffy.scm:200: chicken.string#conc
spiffy.scm:200: srfi-18#current-thread
spiffy.scm:199: scheme#apply
spiffy.scm:191: with-output-to-log
spiffy.scm:667: handle-next-request
spiffy.scm:662: handle-incoming-request
spiffy.scm:492: scheme#call-with-current-continuation
spiffy.scm:492: chicken.condition#with-exception-handler
spiffy.scm:492: ##sys#call-with-values
spiffy.scm:498: ##sys#call-with-values
spiffy.scm:499: scheme#call-with-current-continuation
spiffy.scm:499: intarweb#read-request   <--