documented as unsafe.
* documentation: SB-SYS:WITHOUT-GCING has been documented as unsafe
in multithreaded application code.
+ * bug fix: number of characters that can be written onto a single
+ line in a file is unlimited.
* bug fix: GC deadlocks from asynchronous interrupts has been fixed
by disabling interrupts for the duration of any
SB-SYS:WITHOUT-GCING section.