In case of segfault, log a failure instead of nothing.

Makefile

@@ -22,7 +22,7 @@ DEPENDENCIES := $(foreach exec,$(EXECUTABLES), $(if $(shell which $(exec) 2> /de
 
 ### Generic flags
 SRCS=		spectre_v1 spectre_v2
-CFLAGS=		-march=native -g
+CFLAGS=		-march=native
 CFLAGS+=	-W
 CFLAGS+=	-Wall
 CFLAGS+=	-Werror -Wextra
@@ -32,7 +32,7 @@ LDFLAGS=	-fuse-ld=lld
 
 ### Octopus flags
 CCS=		clang gcc
-OPTIMIZATIONS=	0 1 2 3
+OPTIMIZATIONS=	0 1 2 3 fast s
 RETPOLINE= 	mretpoline
 UUID:=		$(shell uuid)
 RESULTS_FILE:=	results-$(UUID).json
@@ -148,7 +148,7 @@ $(RESULTS_FILE): build
 	for p in $(PROGS); do \
 		for t in $$(seq $(TIMES)); do \
 			sleep 0.1; \
-			taskset 01 ./$$p $(FLAGS) >> $@; \
+			(taskset 01 ./$$p $(FLAGS) || printf "{ \"$$p\": false }")>> $@; \
 			if ! [ "$$p" = "$(lastword $(PROGS))" ]; \
 				then echo ',' >> $@; \
 			else if ! [ $$t -eq $(TIMES) ]; \