Fixed the file cursor error

Author: emmanuelantony2000

crates/evm/evm/src/executors/fuzz/mod.rs

@@ -21,7 +21,7 @@ use proptest::test_runner::{TestCaseError, TestError, TestRunner};
 use std::{
     cell::RefCell,
     collections::BTreeMap,
-    io::{Read, Write},
+    io::{Read, Seek, SeekFrom, Write},
 };
 
 mod types;
@@ -328,6 +328,8 @@ impl FuzzedExecutor {
                 let mut existing: Vec<File> = serde_json::from_slice(&existing).unwrap_or_default();
                 existing.push(result);
                 let result = serde_json::to_vec_pretty(&existing).unwrap();
+                file.seek(SeekFrom::Start(0)).unwrap();
+                file.set_len(0).unwrap();
                 file.write_all(&result).unwrap();
             }
 

crates/forge/src/runner.rs

@@ -41,8 +41,8 @@ use std::{
     borrow::Cow,
     cmp::min,
     collections::BTreeMap,
+    io::{Read, Seek, SeekFrom, Write},
     path::{Path, PathBuf},
-    io::{Read, Write},
     sync::Arc,
     time::Instant,
 };
@@ -596,6 +596,8 @@ impl<'a> FunctionRunner<'a> {
             let mut existing: Vec<File> = serde_json::from_slice(&existing).unwrap_or_default();
             existing.push(result);
             let result = serde_json::to_vec_pretty(&existing).unwrap();
+            file.seek(SeekFrom::Start(0)).unwrap();
+            file.set_len(0).unwrap();
             file.write_all(&result).unwrap();
         }