Fixed error on CI.

It was because `67019.sh` didn't have execute rights.
Glacier did run scripts as if you entered `./script.sh` in your prompt, but that requires execute rights on the script.
So I changed glacier to run `bash script.sh`, which only requires read rights.

Also, shouldn't glacier emit the `+nightly` flag to rustc?

Author: Julian-Wollersberger

ices/67019.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc --edition 2018 -Z mir-opt-level=2 - << EOF
+rustc +nightly --edition 2018 -Z mir-opt-level=2 - << EOF
 fn test(this: ((u8, u8),)) {
     assert!((this.0).1 == 0);
 }

src/lib.rs

@@ -8,6 +8,7 @@ pub use rayon;
 
 static RUSTC: &str = "rustc";
 static ICES_PATH: &str = "ices";
+static SHELL: &str = "bash";
 
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
 enum TestMode {
@@ -40,7 +41,8 @@ impl ICE {
                 .arg(std::fs::canonicalize(&self.path)?)
                 .current_dir(workdir.path())
                 .output()?,
-            TestMode::ShellScript => Command::new(std::fs::canonicalize(&self.path)?)
+            TestMode::ShellScript => Command::new(SHELL)
+                .arg(std::fs::canonicalize(&self.path)?)
                 .current_dir(workdir.path())
                 .output()?,
         };