From 8e3ccd9c9bce2830581596d496e130cb43c179d0 Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Sat, 12 Mar 2016 16:01:34 +0530
Subject: [PATCH] Don't allow values for codegen-units less than 1 (fixes
 #32191)

---
 src/librustc/session/config.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index 679da4abf5f..dba0bcf19be 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -1095,6 +1095,10 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
         }
     }
 
+    if cg.codegen_units < 1 {
+        early_error(error_format, "Value for codegen units must be a positive nonzero integer");
+    }
+
     let cg = cg;
 
     let sysroot_opt = matches.opt_str("sysroot").map(|m| PathBuf::from(&m));