Merge pull request #281 from cryspen/hax-679

Regenerate patches following PR hacspec/hax#679
cryspen · May 17, 2024 · 901dec8 · 901dec8
2 parents e70711c + a6f7c49
commit 901dec8
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Showing 15 changed files with 1,324 additions and 730 deletions.
diff --git a/proofs/fstar/extraction-edited.patch b/proofs/fstar/extraction-edited.patch
diff --git a/proofs/fstar/extraction-secret-independent.patch b/proofs/fstar/extraction-secret-independent.patch
diff --git a/proofs/fstar/extraction/Libcrux.Kem.Kyber.Arithmetic.fst b/proofs/fstar/extraction/Libcrux.Kem.Kyber.Arithmetic.fst
@@ -10,7 +10,7 @@ let get_n_least_significant_bits (n: u8) (value: u32) =
 let barrett_reduce (value: i32) =
   let _:Prims.unit = () <: Prims.unit in
   let t:i64 =
-    ((Core.Convert.f_from value <: i64) *! v_BARRETT_MULTIPLIER <: i64) +!
+    ((Core.Convert.f_from #i64 #i32 value <: i64) *! v_BARRETT_MULTIPLIER <: i64) +!
     (v_BARRETT_R >>! 1l <: i64)
   in
   let quotient:i32 = cast (t >>! v_BARRETT_SHIFT <: i64) <: i32 in
@@ -48,11 +48,13 @@ let add_to_ring_element (v_K: usize) (lhs rhs: t_PolynomialRingElement) =
   let _:Prims.unit = () <: Prims.unit in
   let _:Prims.unit = () <: Prims.unit in
   let lhs:t_PolynomialRingElement =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({
               Core.Ops.Range.f_start = sz 0;
               Core.Ops.Range.f_end
               =
-              Core.Slice.impl__len (Rust_primitives.unsize lhs.f_coefficients <: t_Slice i32)
+              Core.Slice.impl__len #i32 (Rust_primitives.unsize lhs.f_coefficients <: t_Slice i32)
               <:
               usize
             }

diff --git a/proofs/fstar/extraction/Libcrux.Kem.Kyber.Arithmetic.fsti b/proofs/fstar/extraction/Libcrux.Kem.Kyber.Arithmetic.fsti
@@ -42,7 +42,7 @@ val get_n_least_significant_bits (n: u8) (value: u32)
       (ensures
         fun result ->
           let result:u32 = result in
-          result <. (Core.Num.impl__u32__pow 2ul (Core.Convert.f_into n <: u32) <: u32))
+          result <. (Core.Num.impl__u32__pow 2ul (Core.Convert.f_into #u8 #u32 n <: u32) <: u32))
 
 /// Signed Barrett Reduction
 /// Given an input `value`, `barrett_reduce` outputs a representative `result`
@@ -54,8 +54,8 @@ val get_n_least_significant_bits (n: u8) (value: u32)
 val barrett_reduce (value: i32)
     : Prims.Pure i32
       (requires
-        (Core.Convert.f_from value <: i64) >. (Core.Ops.Arith.Neg.neg v_BARRETT_R <: i64) &&
-        (Core.Convert.f_from value <: i64) <. v_BARRETT_R)
+        (Core.Convert.f_from #i64 #i32 value <: i64) >. (Core.Ops.Arith.Neg.neg v_BARRETT_R <: i64) &&
+        (Core.Convert.f_from #i64 #i32 value <: i64) <. v_BARRETT_R)
       (ensures
         fun result ->
           let result:i32 = result in
@@ -132,7 +132,8 @@ let impl__PolynomialRingElement__ZERO: t_PolynomialRingElement =
 val add_to_ring_element (v_K: usize) (lhs rhs: t_PolynomialRingElement)
     : Prims.Pure t_PolynomialRingElement
       (requires
-        Hax_lib.v_forall (fun i ->
+        Hax_lib.v_forall #usize
+          (fun i ->
               let i:usize = i in
               Hax_lib.implies (i <. Libcrux.Kem.Kyber.Constants.v_COEFFICIENTS_IN_RING_ELEMENT
                   <:
@@ -155,12 +156,12 @@ val add_to_ring_element (v_K: usize) (lhs rhs: t_PolynomialRingElement)
       (ensures
         fun result ->
           let result:t_PolynomialRingElement = result in
-          Hax_lib.v_forall (fun i ->
+          Hax_lib.v_forall #usize
+            (fun i ->
                 let i:usize = i in
                 Hax_lib.implies (i <.
-                    (Core.Slice.impl__len (Rust_primitives.unsize result.f_coefficients
-                          <:
-                          t_Slice i32)
+                    (Core.Slice.impl__len #i32
+                        (Rust_primitives.unsize result.f_coefficients <: t_Slice i32)
                       <:
                       usize)
                     <:

diff --git a/proofs/fstar/extraction/Libcrux.Kem.Kyber.Constant_time_ops.fst b/proofs/fstar/extraction/Libcrux.Kem.Kyber.Constant_time_ops.fst
@@ -16,10 +16,9 @@ let compare_ciphertexts_in_constant_time (v_CIPHERTEXT_SIZE: usize) (lhs rhs: t_
   let _:Prims.unit = () <: Prims.unit in
   let (r: u8):u8 = 0uy in
   let r:u8 =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_CIPHERTEXT_SIZE
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_CIPHERTEXT_SIZE }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -38,7 +37,9 @@ let select_shared_secret_in_constant_time (lhs rhs: t_Slice u8) (selector: u8) =
   let mask:u8 = Core.Num.impl__u8__wrapping_sub (is_non_zero selector <: u8) 1uy in
   let out:t_Array u8 (sz 32) = Rust_primitives.Hax.repeat 0uy (sz 32) in
   let out:t_Array u8 (sz 32) =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({
               Core.Ops.Range.f_start = sz 0;
               Core.Ops.Range.f_end = Libcrux.Kem.Kyber.Constants.v_SHARED_SECRET_SIZE
             }

diff --git a/proofs/fstar/extraction/Libcrux.Kem.Kyber.Hash_functions.fst b/proofs/fstar/extraction/Libcrux.Kem.Kyber.Hash_functions.fst
@@ -35,10 +35,9 @@ let absorb (v_K: usize) (input: t_Array (t_Array u8 (sz 34)) v_K) =
       v_K
   in
   let data:t_Array (t_Slice u8) v_K =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -73,10 +72,9 @@ let squeeze_block (v_K: usize) (xof_state: Libcrux.Digest.Incremental_x4.t_Shake
     Rust_primitives.Hax.repeat (Rust_primitives.Hax.repeat 0uy (sz 168) <: t_Array u8 (sz 168)) v_K
   in
   let out:t_Array (t_Array u8 (sz 168)) v_K =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -107,10 +105,9 @@ let squeeze_three_blocks (v_K: usize) (xof_state: Libcrux.Digest.Incremental_x4.
     Rust_primitives.Hax.repeat (Rust_primitives.Hax.repeat 0uy (sz 504) <: t_Array u8 (sz 504)) v_K
   in
   let out:t_Array (t_Array u8 (sz 504)) v_K =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:

diff --git a/proofs/fstar/extraction/Libcrux.Kem.Kyber.Ind_cpa.fst b/proofs/fstar/extraction/Libcrux.Kem.Kyber.Ind_cpa.fst
@@ -8,7 +8,7 @@ let into_padded_array (v_LEN: usize) (slice: t_Slice u8) =
     if true
     then
       let _:Prims.unit =
-        if ~.((Core.Slice.impl__len slice <: usize) <=. v_LEN <: bool)
+        if ~.((Core.Slice.impl__len #u8 slice <: usize) <=. v_LEN <: bool)
         then
           Rust_primitives.Hax.never_to_any (Core.Panicking.panic "assertion failed: slice.len() <= LEN"
 
@@ -20,12 +20,16 @@ let into_padded_array (v_LEN: usize) (slice: t_Slice u8) =
   let out:t_Array u8 v_LEN = Rust_primitives.Hax.repeat 0uy v_LEN in
   let out:t_Array u8 v_LEN =
     Rust_primitives.Hax.Monomorphized_update_at.update_at_range out
-      ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = Core.Slice.impl__len slice <: usize }
+      ({
+          Core.Ops.Range.f_start = sz 0;
+          Core.Ops.Range.f_end = Core.Slice.impl__len #u8 slice <: usize
+        }
         <:
         Core.Ops.Range.t_Range usize)
-      (Core.Slice.impl__copy_from_slice (out.[ {
+      (Core.Slice.impl__copy_from_slice #u8
+          (out.[ {
                 Core.Ops.Range.f_start = sz 0;
-                Core.Ops.Range.f_end = Core.Slice.impl__len slice <: usize
+                Core.Ops.Range.f_end = Core.Slice.impl__len #u8 slice <: usize
               }
               <:
               Core.Ops.Range.t_Range usize ]
@@ -48,10 +52,9 @@ let sample_ring_element_cbd
   let domain_separator, error_1_, prf_input:(u8 &
     t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K &
     t_Array u8 (sz 33)) =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -105,10 +108,9 @@ let sample_vector_cbd_then_ntt
   in
   let domain_separator, prf_input, re_as_ntt:(u8 & t_Array u8 (sz 33) &
     t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K) =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -159,8 +161,13 @@ let compress_then_serialize_u
      =
   let out:t_Array u8 v_OUT_LEN = Rust_primitives.Hax.repeat 0uy v_OUT_LEN in
   let out:t_Array u8 v_OUT_LEN =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter (Core.Iter.Traits.Iterator.f_enumerate
-              (Core.Iter.Traits.Collect.f_into_iter input
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Iter.Adapters.Enumerate.t_Enumerate
+            (Core.Array.Iter.t_IntoIter Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K))
+          (Core.Iter.Traits.Iterator.f_enumerate #(Core.Array.Iter.t_IntoIter
+                  Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K)
+              (Core.Iter.Traits.Collect.f_into_iter #(t_Array
+                      Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K)
+                  input
                 <:
                 Core.Array.Iter.t_IntoIter Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K)
             <:
@@ -180,7 +187,8 @@ let compress_then_serialize_u
               }
               <:
               Core.Ops.Range.t_Range usize)
-            (Core.Slice.impl__copy_from_slice (out.[ {
+            (Core.Slice.impl__copy_from_slice #u8
+                (out.[ {
                       Core.Ops.Range.f_start = i *! (v_OUT_LEN /! v_K <: usize) <: usize;
                       Core.Ops.Range.f_end
                       =
@@ -263,12 +271,11 @@ let encrypt_unpacked
   let ciphertext:t_Array u8 v_CIPHERTEXT_SIZE =
     Rust_primitives.Hax.Monomorphized_update_at.update_at_range_from ciphertext
       ({ Core.Ops.Range.f_start = v_C1_LEN } <: Core.Ops.Range.t_RangeFrom usize)
-      (Core.Slice.impl__copy_from_slice (ciphertext.[ { Core.Ops.Range.f_start = v_C1_LEN }
-              <:
-              Core.Ops.Range.t_RangeFrom usize ]
+      (Core.Slice.impl__copy_from_slice #u8
+          (ciphertext.[ { Core.Ops.Range.f_start = v_C1_LEN } <: Core.Ops.Range.t_RangeFrom usize ]
             <:
             t_Slice u8)
-          (Core.Array.impl_23__as_slice v_C2_LEN c2 <: t_Slice u8)
+          (Core.Array.impl_23__as_slice #u8 v_C2_LEN c2 <: t_Slice u8)
         <:
         t_Slice u8)
   in
@@ -282,8 +289,11 @@ let deserialize_then_decompress_u
     Rust_primitives.Hax.repeat Libcrux.Kem.Kyber.Arithmetic.impl__PolynomialRingElement__ZERO v_K
   in
   let u_as_ntt:t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter (Core.Iter.Traits.Iterator.f_enumerate
-              (Core.Slice.impl__chunks_exact (Rust_primitives.unsize ciphertext <: t_Slice u8)
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Iter.Adapters.Enumerate.t_Enumerate
+            (Core.Slice.Iter.t_ChunksExact u8))
+          (Core.Iter.Traits.Iterator.f_enumerate #(Core.Slice.Iter.t_ChunksExact u8)
+              (Core.Slice.impl__chunks_exact #u8
+                  (Rust_primitives.unsize ciphertext <: t_Slice u8)
                   ((Libcrux.Kem.Kyber.Constants.v_COEFFICIENTS_IN_RING_ELEMENT *!
                       v_U_COMPRESSION_FACTOR
                       <:
@@ -375,8 +385,11 @@ let deserialize_secret_key (v_K: usize) (secret_key: t_Slice u8) =
     Rust_primitives.Hax.repeat Libcrux.Kem.Kyber.Arithmetic.impl__PolynomialRingElement__ZERO v_K
   in
   let secret_as_ntt:t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter (Core.Iter.Traits.Iterator.f_enumerate
-              (Core.Slice.impl__chunks_exact secret_key
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Iter.Adapters.Enumerate.t_Enumerate
+            (Core.Slice.Iter.t_ChunksExact u8))
+          (Core.Iter.Traits.Iterator.f_enumerate #(Core.Slice.Iter.t_ChunksExact u8)
+              (Core.Slice.impl__chunks_exact #u8
+                  secret_key
                   Libcrux.Kem.Kyber.Constants.v_BYTES_PER_RING_ELEMENT
                 <:
                 Core.Slice.Iter.t_ChunksExact u8)
@@ -423,8 +436,13 @@ let serialize_secret_key
      =
   let out:t_Array u8 v_OUT_LEN = Rust_primitives.Hax.repeat 0uy v_OUT_LEN in
   let out:t_Array u8 v_OUT_LEN =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter (Core.Iter.Traits.Iterator.f_enumerate
-              (Core.Iter.Traits.Collect.f_into_iter key
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Iter.Adapters.Enumerate.t_Enumerate
+            (Core.Array.Iter.t_IntoIter Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K))
+          (Core.Iter.Traits.Iterator.f_enumerate #(Core.Array.Iter.t_IntoIter
+                  Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K)
+              (Core.Iter.Traits.Collect.f_into_iter #(t_Array
+                      Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K)
+                  key
                 <:
                 Core.Array.Iter.t_IntoIter Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K)
             <:
@@ -450,7 +468,8 @@ let serialize_secret_key
               }
               <:
               Core.Ops.Range.t_Range usize)
-            (Core.Slice.impl__copy_from_slice (out.[ {
+            (Core.Slice.impl__copy_from_slice #u8
+                (out.[ {
                       Core.Ops.Range.f_start
                       =
                       i *! Libcrux.Kem.Kyber.Constants.v_BYTES_PER_RING_ELEMENT <: usize;
@@ -490,7 +509,8 @@ let serialize_public_key
       ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_RANKED_BYTES_PER_RING_ELEMENT }
         <:
         Core.Ops.Range.t_Range usize)
-      (Core.Slice.impl__copy_from_slice (public_key_serialized.[ {
+      (Core.Slice.impl__copy_from_slice #u8
+          (public_key_serialized.[ {
                 Core.Ops.Range.f_start = sz 0;
                 Core.Ops.Range.f_end = v_RANKED_BYTES_PER_RING_ELEMENT
               }
@@ -513,9 +533,8 @@ let serialize_public_key
       ({ Core.Ops.Range.f_start = v_RANKED_BYTES_PER_RING_ELEMENT }
         <:
         Core.Ops.Range.t_RangeFrom usize)
-      (Core.Slice.impl__copy_from_slice (public_key_serialized.[ {
-                Core.Ops.Range.f_start = v_RANKED_BYTES_PER_RING_ELEMENT
-              }
+      (Core.Slice.impl__copy_from_slice #u8
+          (public_key_serialized.[ { Core.Ops.Range.f_start = v_RANKED_BYTES_PER_RING_ELEMENT }
               <:
               Core.Ops.Range.t_RangeFrom usize ]
             <:
@@ -532,7 +551,7 @@ let generate_keypair_unpacked
      =
   let hashed:t_Array u8 (sz 64) = Libcrux.Kem.Kyber.Hash_functions.v_G key_generation_seed in
   let seed_for_A, seed_for_secret_and_error:(t_Slice u8 & t_Slice u8) =
-    Core.Slice.impl__split_at (Rust_primitives.unsize hashed <: t_Slice u8) (sz 32)
+    Core.Slice.impl__split_at #u8 (Rust_primitives.unsize hashed <: t_Slice u8) (sz 32)
   in
   let a_transpose:t_Array (t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K) v_K =
     Libcrux.Kem.Kyber.Matrix.sample_matrix_A v_K
@@ -558,10 +577,9 @@ let generate_keypair_unpacked
   in
   let secret_as_ntt, tt_as_ntt:(t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K &
     t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K) =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -577,7 +595,9 @@ let generate_keypair_unpacked
             temp_0_
           in
           let i:usize = i in
-          Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
+          Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+                  usize)
+                ({
                     Core.Ops.Range.f_start = sz 0;
                     Core.Ops.Range.f_end
                     =
@@ -670,10 +690,9 @@ let generate_keypair_unpacked
     a_transpose
   in
   let a_matrix:t_Array (t_Array Libcrux.Kem.Kyber.Arithmetic.t_PolynomialRingElement v_K) v_K =
-    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-              Core.Ops.Range.f_start = sz 0;
-              Core.Ops.Range.f_end = v_K
-            }
+    Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+            usize)
+          ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
             <:
             Core.Ops.Range.t_Range usize)
         <:
@@ -685,10 +704,9 @@ let generate_keypair_unpacked
             a_matrix
           in
           let i:usize = i in
-          Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter ({
-                    Core.Ops.Range.f_start = sz 0;
-                    Core.Ops.Range.f_end = v_K
-                  }
+          Core.Iter.Traits.Iterator.f_fold (Core.Iter.Traits.Collect.f_into_iter #(Core.Ops.Range.t_Range
+                  usize)
+                ({ Core.Ops.Range.f_start = sz 0; Core.Ops.Range.f_end = v_K }
                   <:
                   Core.Ops.Range.t_Range usize)
               <: