add -Werror, fix clang warning

2 files changed, 2 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index d23f364..b3ee253 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 APP=km-test
-CFLAGS=-W -Wall -Wextra -pedantic -std=c11 -O2
+CFLAGS=-W -Wall -Wextra -Werror -pedantic -std=c11 -O2
 OBJS=km-set.o km-draw.o km-load.o km-find.o km-rand.o km-solve.o main.o
 LIBS=-lm
 
diff --git a/main.c b/main.c
index e81475d..ec62022 100644
--- a/main.c
+++ b/main.c
@@ -67,7 +67,7 @@ load_on_error(
   void * const cb_data
 ) {
   UNUSED(cb_data);
-  die(err);
+  die("load failed: %s", err);
 }
 
 static const km_load_cbs_t