zsh sqlcmd completion is broken

Open

#750 opened on May 8, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 3/5
Estimated time: 1-2 days
Newbie friendliness: 70/100

Issue type: Bug
Clarity: Clearly specified
Activity status: Quiet
Tech stack: go, zsh
Domain: cli

Research direction

Reproduce the failure with sqlcmd __complete '' and sqlcmd __complete conf, then read the completion argument path in cmd/sqlcmd/sqlcmd.go around lines 289, 319, 362, and 375, along with cmd/modern/main.go:52. Done means zsh completion for sqlcmd produces suggestions for commands and an empty prompt without panicking.

Written by the indexing model from the issue text.

Description

Installed sqlcmd on MacOS with HomeBrew. After rebuilding ~/.zcompdump the command shows up fine:

% cat ~/.zcompdump | rg sqlcmd
'sqlcmd' '_sqlcmd'

However, trying to autocomplete commands like sqlcmd conf<TAB> or plain sqlcmd <TAB> does nothing.

Looks like there's a real problem there:

~ % sqlcmd __complete ''
panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
github.com/microsoft/go-sqlcmd/cmd/sqlcmd.isFlag(...)
        github.com/microsoft/go-sqlcmd/cmd/sqlcmd/sqlcmd.go:375
github.com/microsoft/go-sqlcmd/cmd/sqlcmd.checkDefaultValue({0x13c831621600, 0x2, 0x13c8317add88?}, 0x1)
        github.com/microsoft/go-sqlcmd/cmd/sqlcmd/sqlcmd.go:362 +0x2b8
github.com/microsoft/go-sqlcmd/cmd/sqlcmd.convertOsArgs({0x13c8312b6310?, 0x101b82380?, 0x100e1cb4b?})
        github.com/microsoft/go-sqlcmd/cmd/sqlcmd/sqlcmd.go:319 +0x1f0
github.com/microsoft/go-sqlcmd/cmd/sqlcmd.Execute({0x1010ea180, 0x6})
        github.com/microsoft/go-sqlcmd/cmd/sqlcmd/sqlcmd.go:289 +0x148
main.main()
        github.com/microsoft/go-sqlcmd/cmd/modern/main.go:52 +0x1b4

~ % sqlcmd __complete conf
:0
Completion ended with directive: ShellCompDirectiveDefault

Version: sqlcmd ✔: stable 1.10.0 (bottled)

Dominant language: Go
Stars: 595
Forks: 91
Avg merge: 9h 35m
Merged PRs (30d): 1

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