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-rw-r--r--lisc/ssa.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisc/ssa.c b/lisc/ssa.c
index 6f28634..e01bcc6 100644
--- a/lisc/ssa.c
+++ b/lisc/ssa.c
@@ -23,6 +23,7 @@ fillpreds(Fn *f)
 	for (b=f->start; b; b=b->link) {
 		b->npreds = 0;
 		free(b->preds);
+		b->preds = 0;
 	}
 	for (b=f->start; b; b=b->link) {
 		if (b->s1)