This occurs on my Raspberry Pi 3B+ running Raspbian Buster on current ECL:

Script started on 2019-12-28 05:53:34-08:00 [TERM="xterm" TTY="/dev/pts/0" COLUMNS="80" LINES="24"] ]0;pi@raspberrypi: ~ pi@raspberrypi:~ $ ecl ;;; Loading "/home/pi/quicklisp/setup.lisp" ;;; Loading #P"/home/pi/ecl/lib/ecl-16.1.3/asdf.fas" ECL (Embeddable Common-Lisp) 16.1.3 (git:87a1c5faed97bd0b946a4fd82f33cb666879cd4f) Copyright (C) 1984 Taiichi Yuasa and Masami Hagiya Copyright (C) 1993 Giuseppe Attardi Copyright (C) 2013 Juan J. Garcia-Ripoll Copyright (C) 2018 Daniel Kochmanski Copyright (C) 2019 Daniel Kochmanski and Marius Gerbershagen ECL is free software, and you are welcome to redistribute it under certain conditions; see file 'Copyright' for details. Type :h for Help. Top level in: #<process TOP-LEVEL 0x709fc0>.

(ql:quickload "ironclad")

To load "ironclad": Load 1 ASDF system: ironclad ; Loading "ironclad" [package nibbles]................................. [package alexandria.1.0.0]........................ [package bordeaux-threads]........................ [package ironclad]................................ .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. ............ ;;; Internal error: ;;; ** Error code 1 when executing ;;; (SI:RUN-PROGRAM-INNER "gcc" ("-I." "-I/home/pi/ecl/include/" "-D_GNU_SOURCE" "-D_FILE_OFFSET_BITS=64" "-g" "-O2" "-fPIC" "-D_THREAD_SAFE" "-Dlinux" "-O2" "-c" ".cache/common-lisp/ecl-16.1.3-87a1c5fa-linux-armv7l/home/pi/quicklisp/dists /quicklisp/software/ironclad-v0.47/src/ciphers/kalyna.c" "-o" ".cache/common-lisp/ecl-16.1.3-87a1c5fa-linux-armv7l/home/pi/quicklisp/dists /quicklisp/software/ironclad-v0.47/src/ciphers/kalyna.o") NIL): ;;; .cache/common-lisp/ecl-16.1.3-87a1c5fa-linux-armv7l/home/pi/quicklisp/dists/ quicklisp/software/ironclad-v0.47/src/ciphers/kalyna.c: In function 'L49kalyna512_decrypt_block': ;;; .cache/common-lisp/ecl-16.1.3-87a1c5fa-linux-armv7l/home/pi/quicklisp/dists/ quicklisp/software/ironclad-v0.47/src/ciphers/kalyna.c:231231:18: note: variable tracking size limit exceeded with -fvar-tracking-assignments, retrying without ;;; static cl_object L49kalyna512_decrypt_block(cl_object v1context, cl_object v2ciphertext, cl_object v3ciphertext_start, cl_object v4plaintext, cl_object v5plaintext_start) ;;; ^~~~~~~~~~~~~~~~~~~~~~~~~~ ;;; .cache/common-lisp/ecl-16.1.3-87a1c5fa-linux-armv7l/home/pi/quicklisp/dists/ quicklisp/software/ironclad-v0.47/src/ciphers/kalyna.c: In function 'L48kalyna512_encrypt_block': ;;; .cache/common-lisp/ecl-16.1.3-87a1c5fa-linux-armv7l/home/pi/quicklisp/dists/ quicklisp/software/ironclad-v0.47/src/ciphers/kalyna.c:185126:18: note: variable tracking size limit exceeded with -fvar-tracking-assignments, retrying without ;;; static cl_object L48kalyna512_encrypt_block(cl_object v1context, cl_object v2plaintext, cl_object v3plaintext_start, cl_object v4ciphertext, cl_object v5ciphertext_start) ;;; ^~~~~~~~~~~~~~~~~~~~~~~~~~ ;;; gcc: fatal error: Killed signal terminated program cc1 ;;; compilation terminated. Condition of type: COMPILE-FILE-ERROR COMPILE-FILE-ERROR while compiling #<ironclad-source-file "ironclad" "src" "ciphers" "kalyna">

Available restarts:

1. (RETRY) Retry compiling #<ironclad-source-file "ironclad" "src" "ciphers" "kalyna">. 2. (ACCEPT) Continue, treating compiling #<ironclad-source-file "ironclad" "src" "ciphers" "kalyna"> as having been successful. 3. (RETRY) Retry ASDF operation. 4. (CLEAR-CONFIGURATION-AND-RETRY) Retry ASDF operation after resetting the configuration. 5. (ABORT) Give up on "ironclad" 6. (RESTART-TOPLEVEL) Go back to Top-Level REPL.

Broken at ASDF/ACTION:PERFORM. In: #<pr