tracing of SB-INT::SIMPLE-EVAL-IN-LEXENV ends in LDB

[Roman Marynchak]

Place the breakpoint:

(trace sb-int::simple-eval-in-lexenv :break t)

Then enter a definition in REPL:

(defun f(x) (+ x 3))

The result is:

INFO: Control stack guard page unprotected
Control stack guard page temporarily disabled: proceed with caution

fatal error encountered in SBCL pid 6132(tid 140737353946864):
Control stack exhausted

Welcome to LDB, a low-level debugger for the Lisp runtime environment.
ldb>

Occurs at least on Linux x86 and x86-64

From LDB backtrace it seems that SBCL enters a very deep debugger level recursively and then aborts.

Regards,
Roman