steps

First create the minimal SBT project with:

mkdir -p minimal-sbt-project/project && echo "sbt.version=1.6.2" > minimal-sbt-project/project/build.properties

Then, run the following script:

#!/bin/bash

# Exit on any failure
set -e

COUNT=10

for i in $(seq $COUNT); do
        FILE=`mktemp -d`
        stat "$FILE"
        sbt -version
        stat "$FILE"
done

problem

On my machine it consistently fails with:

> ./now.sh
16777232 21034573 drwx------ 2 michal staff 0 64 "Jun 23 16:01:42 2022" "Jun 23 16:01:42 2022" "Jun 23 16:01:42 2022" "Jun 23 16:01:42 2022" 4096 0 0 /var/folders/kv/xdkw5txn6kv5b58gvztphzdm0000gn/T/tmp.gNNuDyDk
sbt version in this project: 1.6.2
sbt script version: 1.6.2
stat: /var/folders/kv/xdkw5txn6kv5b58gvztphzdm0000gn/T/tmp.gNNuDyDk: stat: No such file or directory

Sometimes it fails after a few iterations, but COUNT=10 is enough to make it fail consistently on my machine.

expectation

I would expect SBT not to delete the directory created with mktemp -d

notes

I know it may look ridiculous to even suspect SBT here which wasn't passed the file in the first place, but I have a number of reasons to believe that's the case:

• if I change sbt.version to e.g. 1.3.13 (or anything prior 1.3.13) the problem goes away. The problem persists for any sbt version greater or equal to 1.4.5. I am not sure about <1.4.0, 1.4.4> version range as those versions don't work on my machine because of the architecture (I have M1)
• if you think that there's something about the script - I am able to reproduce it consistently just by executing commands sequentially

another observations

My MacOS version: 12.4. I had this problem before updating from 12.1 as well
Chip: Apple M1 Pro

Happens for all JDKs I tried:

openjdk version "17.0.2" 2022-01-18
OpenJDK Runtime Environment (build 17.0.2+8-86)
OpenJDK 64-Bit Server VM (build 17.0.2+8-86, mixed mode, sharing)

openjdk version "1.8.0_322"
OpenJDK Runtime Environment (build 1.8.0_322-b06)
OpenJDK 64-Bit Server VM (build 25.322-b06, mixed mode)

openjdk version "11.0.13" 2021-10-19 LTS
OpenJDK Runtime Environment (build 11.0.13+8-LTS)
OpenJDK 64-Bit Server VM (build 11.0.13+8-LTS, mixed mode)

It happens only for temporary directories. Namely, if you change mktemp -d to mktemp script works just fine.

It doesn't seem to be related to anything that sbt does on its exit, I see the file gone already after opening interactive sbt.

While it's easy to reproduce on my laptop, none of 2 people I asked for running it on MacOS had this issue.