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-rw-r--r--src/glsl/apps/purify.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/glsl/apps/purify.c b/src/glsl/apps/purify.c
index 5ab6bae96d..0f09b157ef 100644
--- a/src/glsl/apps/purify.c
+++ b/src/glsl/apps/purify.c
@@ -58,6 +58,9 @@ main(int argc,
fseek(in, 0, SEEK_END);
size = ftell(in);
assert(size != -1);
+ if (size == -1) {
+ return 1;
+ }
fseek(in, 0, SEEK_SET);
out = fopen(argv[2], "wb");