diff --git a/Python/compile.c b/Python/compile.c
index c2fa1c0..65dacc2 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -6162,8 +6162,7 @@ stackdepth(struct compiler *c)
         entryblock = b;
         nblocks++;
     }
-    if (!entryblock)
-        return 0;
+    assert(entryblock!= NULL);
     stack = (basicblock **)PyObject_Malloc(sizeof(basicblock *) * nblocks);
     if (!stack) {
         PyErr_NoMemory();
@@ -6725,6 +6724,7 @@ assemble(struct compiler *c, int addNone)
         nblocks++;
         entryblock = b;
     }
+    assert(entryblock != NULL);
 
     if (insert_generator_prefix(c, entryblock)) {
         goto error;
@@ -6732,7 +6732,7 @@ assemble(struct compiler *c, int addNone)
 
     /* Set firstlineno if it wasn't explicitly set. */
     if (!c->u->u_firstlineno) {
-        if (entryblock && entryblock->b_instr && entryblock->b_instr->i_lineno)
+        if (entryblock->b_instr && entryblock->b_instr->i_lineno)
             c->u->u_firstlineno = entryblock->b_instr->i_lineno;
        else
             c->u->u_firstlineno = 1;