Merge pull request #1121 from openmina/fuzzer_fixes

Fuzzer fixes

Author: dkuehr

ledger/src/proofs/public_input/prepared_statement.rs

@@ -172,7 +172,7 @@ impl PreparedStatement {
         uses_lookup.to_field_elements(&mut fields);
 
         if uses_lookup {
-            fields.push(lookup_value.unwrap());
+            fields.push(lookup_value.unwrap_or(Fq::zero()));
         } else {
             fields.push(Fq::zero());
         }

tools/fuzzing/src/transaction_fuzzer/coverage/reports.rs

@@ -497,7 +497,7 @@ impl CoverageReport {
                     //println!("{:?}", source_range);
 
                     for line in start..=end {
-                        if line == lines.len() || lines[line].line.chars().count() == 0 {
+                        if line >= lines.len() || lines[line].line.chars().count() == 0 {
                             continue;
                         }