Exit with status 1 on assembly error

This will break unix pipelines in order to prevent any emulator down the
pipeline from attempting to run a malassembled program.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index c7d3590..8d6e186 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,11 +12,17 @@ fn main() {
     };
 
     let (bytecode, tokens) = assemble(&source_code);
+    let mut is_error = false;
     for token in &tokens {
-        token.print_error(&source_code); }
+        if token.print_error(&source_code) { is_error = true };
+    }
     eprintln!("Assembled program in {} bytes.", bytecode.len());
     let bytecode_len = bytecode.len();
 
+    if is_error {
+        std::process::exit(1)
+    }
+
     // Write bytecode to standard output
     let mut stdout = std::io::stdout().lock();
     match stdout.write(&bytecode) {