Occasional crash when using the immediate-output flag

[jarrodharvey]

Prerequisites

• make sure you're are using the latest version by rush -V
  $ rush -V
  rush v0.5.3

Checking new version...
You are using the latest version of rush

• read the usage (rush -h) and examples
  Done

Describe your issue

• describe the problem
  When using the immediate output flag, rush will occasionally fail (but the processes it called will continue to run).

The error looks like the below.

panic: runtime error: slice bounds out of range [7998:7994]

goroutine 81 [running]:
github.com/shenwei356/rush/process.(*ImmediateLineWriter).WritePrefixedLines(0xc0003d0000, {0xc0003ba000, 0x1f3e}, 0xc0000ca008)
        /home/shenwei/go/src/github.com/shenwei356/rush/process/process.go:378 +0x625
github.com/shenwei356/rush/process.ImmediateWriter.Write(...)
        /home/shenwei/go/src/github.com/shenwei356/rush/process/process.go:422
io.copyBuffer({0x1408100, 0xc00038c070}, {0x14084e0, 0xc0003e6008}, {0x0, 0x0, 0x0})
        /usr/local/go/src/io/io.go:429 +0x204
io.Copy(...)
        /usr/local/go/src/io/io.go:386
os/exec.(*Cmd).writerDescriptor.func1()
        /usr/local/go/src/os/exec/exec.go:560 +0x3a
os/exec.(*Cmd).Start.func2(0x0?)
        /usr/local/go/src/os/exec/exec.go:717 +0x32
created by os/exec.(*Cmd).Start
        /usr/local/go/src/os/exec/exec.go:716 +0xab3

• provide a reproducible example

Unfortunately, the python script that rush is calling is my company's IP so I cannot provide it to support repro. I can, however, provide the rush command that I'm using if that helps.

cat parallel.txt | rush 'python main.py find_results/{}.txt extraction_results/{} debug' -c -I --eta

Note that it seems to work well for a while after running this command before failing at a seemingly random point in time.

[shenwei356]

Here's a quick fix.

• rush_darwin_amd64.tar.gz
• rush_darwin_arm64.tar.gz
• rush_linux_amd64.tar.gz
• rush_windows_amd64.exe.tar.gz

[jarrodharvey]

Amazing thank you Wei that was fast. Appreciate the effort.

Unfortunately I'm on Windows, and the python script only works on windows, so can't make use of these. Looking forward to the windows fix once it's ready.

[shenwei356]

@jarrodharvey Oh, I'm sorry for forgetting the Windows version. It's updated now.