[BUG] Cannot run executable found relative to current directory

[danmichaelo]

Describe the bug

doppler run COMMAND fails if COMMAND is resolved from PATH and located relative to the current directory.

To Reproduce
Steps to reproduce the behavior (minimal example):

1. Create a hello-world bash script in ./bin and add the folder to PATH:

$ mkdir bin
$ cat <<EOF > ./bin/hello-world
#!/usr/bin/env bash
echo "Hello world"
EOF

$ chmod +x ./bin/hello-world
$ export PATH=./bin:$PATH

2. Verify that we can run it directly:

$ hello-world
Hello world

3. Try running it through Doppler:

$ doppler run hello-world
Doppler Error: exec: "hello-world": cannot run executable found relative to current directory

Note that it does work to run doppler run ./bin/hello-world, not just doppler run hello-world.

Expected behavior

It should work to run commands from PATH relative to the current directory.

CLI Version:
Version v3.60.1

Additional context

Related bug with fix? syncthing/syncthing#8499