1 files changed, 5 insertions, 3 deletions
diff --git a/bfcomp.c b/bfcomp.c
index 8065fc4..5a3ede6 100644
--- a/bfcomp.c
+++ b/bfcomp.c
@@ -327,9 +327,11 @@ void readsource(FILE *f,char **sourcep,Sourcemap **smp){
 			sz*=2;
 			source=realloc(source,sz);
 			if(!source)outofmem();
-			sm->maps=realloc(sm->maps,sz*sizeof(Range));
-			if(!sm->maps)outofmem();
-			memset(sm->maps+sz/2,0,sz/2*sizeof(Range));
+			if(sm){
+				sm->maps=realloc(sm->maps,sz*sizeof(Range));
+				if(!sm->maps)outofmem();
+				memset(sm->maps+sz/2,0,sz/2*sizeof(Range));
+			}
 		}
 		char c=fgetc(f);
 		if(feof(f))break;