Add commented-out prints of solution candidates for debugging

components/equihash/src/tromp.rs

@@ -44,6 +44,7 @@ extern "C" {
 ///
 /// This function uses unsafe code for FFI into the tromp solver.
 #[allow(unsafe_code)]
+#[allow(clippy::print_stdout)]
 unsafe fn worker(eq: *mut CEqui, p: Params, curr_state: &State) -> Vec<Vec<u32>> {
     // SAFETY: caller must supply a valid `eq` instance.
     //
@@ -70,13 +71,21 @@ unsafe fn worker(eq: *mut CEqui, p: Params, curr_state: &State) -> Vec<Vec<u32>>
         let nsols = equi_nsols(eq);
         let sols = equi_sols(eq);
         let solution_len = 1 << p.k;
+        //println!("{nsols} solutions of length {solution_len} at {sols:?}");
 
         // SAFETY:
         // - caller must supply a `p` instance that matches the hard-coded values in the C code.
         // - `sols` is a single allocation containing at least `nsols` solutions.
         // - this slice is a shared ref to the memory in a valid `eq` instance supplied by the caller.
         let solutions: &[u32] = slice::from_raw_parts(sols, nsols * solution_len);
 
+        /*
+        println!(
+            "{nsols} solutions of length {solution_len} as a slice of length {:?}",
+            solutions.len()
+        );
+        */
+
         let mut chunks = solutions.chunks_exact(solution_len);
 
         // SAFETY:
@@ -98,6 +107,17 @@ unsafe fn worker(eq: *mut CEqui, p: Params, curr_state: &State) -> Vec<Vec<u32>>
         solutions
     };
 
+    /*
+    println!(
+        "{} solutions as cloned vectors of length {:?}",
+        solutions.len(),
+        solutions
+            .iter()
+            .map(|solution| solution.len())
+            .collect::<Vec<_>>()
+    );
+    */
+
     solutions
 }
 

components/equihash/tromp/equi_miner.c

@@ -355,8 +355,15 @@ typedef struct equi equi;
     listindices1(eq, WK, t, prf); // assume WK odd
     qsort(prf, PROOFSIZE, sizeof(u32), &compu32);
     for (u32 i=1; i<PROOFSIZE; i++)
-      if (prf[i] <= prf[i-1])
+      if (prf[i] <= prf[i-1]) {
+        /*
+        printf(
+          "failed dup indexes check: wanted: proof[%d] > proof[%d], actual: %d <= %d\n",
+          i, i-1, prf[i], prf[i-1]
+        );
+        */
         return;
+      }
 #ifdef EQUIHASH_TROMP_ATOMIC
     u32 soli = std::atomic_fetch_add_explicit(&eq->nsols, 1U, std::memory_order_relaxed);
 #else
@@ -678,7 +685,7 @@ nc++,       candidate(eq, tree_from_bid(bucketid, s0, s1));
         }
       }
     }
-//printf(" %d candidates ", nc);
+//printf(" %d candidates\n", nc);
   }
 
   size_t equi_nsols(const equi *eq) {