From f6cb684a9aa6e783af7a311703bff1d87d649ba7 Mon Sep 17 00:00:00 2001
From: Ian Butterworth <i.r.butterworth@gmail.com>
Date: Sat, 11 Nov 2023 20:53:37 -0500
Subject: [PATCH] show output if test fails

---
 test/cmdlineargs.jl | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/test/cmdlineargs.jl b/test/cmdlineargs.jl
index c1681532d26ea1..7f7f314fb54862 100644
--- a/test/cmdlineargs.jl
+++ b/test/cmdlineargs.jl
@@ -62,8 +62,19 @@ end
 
 @testset "julia_cmd" begin
     julia_basic = Base.julia_cmd()
+    function get_julia_cmd(arg)
+        io = Base.BufferStream()
+        cmd = `$julia_basic $arg -e 'print(repr(Base.julia_cmd()))'`
+        try
+            run(pipeline(cmd, stdout=io, stderr=io))
+        catch
+            @error "cmd failed" cmd read(io, String)
+            rethrow()
+        end
+        return read(io, String)
+    end
+
     opts = Base.JLOptions()
-    get_julia_cmd(arg) = strip(read(`$julia_basic $arg -e 'print(repr(Base.julia_cmd()))'`, String), ['`'])
 
     for (arg, default) in (
                             ("-C$(unsafe_string(opts.cpu_target))",  false),