Using spawn with os.execute inside a thread causes runtime error #25721
Description
Describe the bug
I have this code snippet
pub fn run_batches(targets []Target, batches [][]string) ! {
mut name_to_cmds := map[string][]string{}
for t in targets {
name_to_cmds[t.name] = t.cmds.clone()
}
for batch in batches {
mut threads := []thread !string{}
for name in batch {
cmds := name_to_cmds[name].clone()
threads << spawn exec_node_concurrent(name, cmds)
}
for mut t in threads {
res := t.wait() or { return error(err.str()) }
println(res)
}
}
}
fn exec_node_concurrent(name string, cmd_list []string) !string {
for cmd in cmd_list {
println('${name}: executing command "${cmd}"')
res := os.execute(cmd)
if res.exit_code != 0 {
return error('command failed (exit ' + res.exit_code.str() + '): ' + cmd)
}
}
return 'target "${name}" executed successfully'
}
when I run it gives me this:
Reproduction Steps
here is the full code: https://github.com/SalmaElsoly/vmake/blob/master/src/vmake/runner.v
run with -p to run using threads
Expected Behavior
runs normally as the series one
Current Behavior
it runs in series without using threads when I add threads it doesn't run
Possible Solution
No response
Additional Information/Context
No response
V version
V 0.4.12 6a590f1,
Environment details (OS name and version, etc.)
linux, Ubuntu 24.04.3 LTS
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