From 0663b713b7d0fb36688283fad7e0c779f6c0ba48 Mon Sep 17 00:00:00 2001
From: Henri Francois <henrifrancois97@gmail.com>
Date: Mon, 14 Jun 2021 11:22:22 -0400
Subject: [PATCH] Handling job=0 argument in cargo config files.

---
 src/cargo/core/compiler/build_config.rs |  3 +++
 tests/testsuite/build.rs                | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/src/cargo/core/compiler/build_config.rs b/src/cargo/core/compiler/build_config.rs
index 4b488261ccf..bc829ef2ba2 100644
--- a/src/cargo/core/compiler/build_config.rs
+++ b/src/cargo/core/compiler/build_config.rs
@@ -69,6 +69,9 @@ impl BuildConfig {
             )?;
         }
         let jobs = jobs.or(cfg.jobs).unwrap_or(::num_cpus::get() as u32);
+        if jobs == 0 {
+            anyhow::bail!("jobs may not be 0");
+        }
 
         Ok(BuildConfig {
             requested_kinds,
diff --git a/tests/testsuite/build.rs b/tests/testsuite/build.rs
index 1dfc8d99437..fc11e666df0 100644
--- a/tests/testsuite/build.rs
+++ b/tests/testsuite/build.rs
@@ -4802,6 +4802,24 @@ fn good_cargo_config_jobs() {
     p.cargo("build -v").run();
 }
 
+#[cargo_test]
+fn invalid_cargo_config_jobs() {
+    let p = project()
+        .file("src/lib.rs", "")
+        .file(
+            ".cargo/config",
+            r#"
+                [build]
+                jobs = 0
+            "#,
+        )
+        .build();
+    p.cargo("build -v")
+        .with_status(101)
+        .with_stderr_contains("error: jobs may not be 0")
+        .run();
+}
+
 #[cargo_test]
 fn invalid_jobs() {
     let p = project()