Booting seems to work, but I can't test format since I get this error, which I also get on master:
* (sicl-boot:repl sicl-boot:*e5*)
COMMON-LISP-USER>> (format t "~a~%" 1)
debugger invoked on a CLEAVIR-CST-TO-AST:EVAL-ERROR in thread
#<THREAD "main thread" RUNNING {1001350073}>:
ERROR while evaluating compile-time side effect:
Attempt to call function MAKE-ARRAY in environment #<Environment E5>
Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.
restarts (invokable by number or by possibly-abbreviated name):
0: [SIGNAL-ORIGINAL-CONDITION] Let the originally signaled condition propagate.
1: [ABORT ] Exit debugger, returning to top level.
(SB-KERNEL:WITH-SIMPLE-CONDITION-RESTARTS ERROR NIL CLEAVIR-CST-TO-AST:EVAL-ERROR :CST #<CONCRETE-SYNTAX-TREE:CONS-CST raw: (FORMAT T "~a~%" 1) {10095790D3}> :CONDITION #<SIMPLE-ERROR "Attempt to call function ~s in environment ~s" {10115E9343}>)
0]
Booting seems to work, but I can't test format since I get this error, which I also get on master: