Handle starknet compilation error (#2297)

Author: kirugan

starknet/compiler/rust/Cargo.toml

@@ -5,6 +5,9 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[profile.release]
+overflow-checks = true
+
 [dependencies]
 serde = "1.0.208"
 serde_json = { version = "1.0.125", features = ["raw_value"] }

starknet/compiler/rust/src/lib.rs

@@ -1,5 +1,6 @@
-use cairo_lang_starknet_classes::casm_contract_class::CasmContractClass;
+use cairo_lang_starknet_classes::casm_contract_class::{CasmContractClass, StarknetSierraCompilationError};
 use std::ffi::{c_char, CStr, CString};
+use std::panic::{self,AssertUnwindSafe};
 
 #[no_mangle]
 #[allow(clippy::not_unsafe_ptr_arg_deref)]
@@ -24,7 +25,18 @@ pub extern "C" fn compileSierraToCasm(sierra_json: *const c_char, result: *mut *
         }
     };
 
-    let casm_class = match CasmContractClass::from_contract_class(sierra_class, true, usize::MAX) {
+    let mut casm_class_result: Option<Result<CasmContractClass, StarknetSierraCompilationError>> = None;
+    let compilation_result = panic::catch_unwind(AssertUnwindSafe(|| {
+        casm_class_result = Some(CasmContractClass::from_contract_class(sierra_class, true, usize::MAX));
+    }));
+    if let Err(_) = compilation_result {
+        unsafe {
+            *result = raw_cstr("panic during compilation".to_string());
+        }
+        return 0;
+    }
+
+    let casm_class = match casm_class_result.unwrap() {
         Ok(value) => value,
         Err(e) => {
             unsafe {