SC3036 false positive on ash (In Dash, echo flags besides -n are not supported)

[felipecrs]

For bugs

• Rule Id: SC3036
• My shellcheck version: 0.10.0
• The rule's wiki page does not already cover this (https://shellcheck.net/wiki/SC3036)
• I tried on https://www.shellcheck.net/ and verified that this is still a problem on the latest commit

Here's a snippet or screenshot that shows the problem:

# shellcheck shell=ash

echo -e "\nhi\nthere\nyou"

Here's what shellcheck currently says:

echo -e "\nhi\nthere\nyou"
     ^-- [SC3036](https://www.shellcheck.net/wiki/SC3036) (error): In dash, echo flags besides -n not supported.

Here's what I wanted or expected to see:

Nothing, as this is supported:

$ docker run --rm -it alpine ash -c 'echo -e "\nhi\nthere\nyou"'

hi
there
you

$ docker run --rm -it busybox sh -c 'echo -e "\nhi\nthere\nyou"

hi
there
you

[wileyhy]

Hm, I haven't used busybox before, AFAIK, but here's how dash behaves in Termux on Android: ~ $ bash --version GNU bash, version 5.2.37(1)-release ... ~ $ dash $ echo -e '\nfoo'

…

-e foo $ echo '\nfoo' foo $ Wiley

On Wed, Dec 11, 2024, 13:01 Felipe Santos ***@***.***> wrote: For bugs - Rule Id: SC3036 - My shellcheck version: 0.10.0 - The rule's wiki page does not already cover this ( https://shellcheck.net/wiki/SC3036) - I tried on https://www.shellcheck.net/ and verified that this is still a problem on the latest commit Here's a snippet or screenshot that shows the problem: # shellcheck shell=ash echo -e "\nhi\nthere\nyou" Here's what shellcheck currently says: echo -e "\nhi\nthere\nyou" ^-- [SC3036](https://www.shellcheck.net/wiki/SC3036) (error): In dash, echo flags besides -n not supported. Here's what I wanted or expected to see: Nothing, as this is supported: $ docker run --rm -it alpine ash -c 'echo -e "\nhi\nthere\nyou"' hithereyou $ docker run --rm -it busybox sh -c 'echo -e "\nhi\nthere\nyou" hithereyou — Reply to this email directly, view it on GitHub <#3100>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AUF2F24EXQXJLFMJEFK2JIL2FCR3XAVCNFSM6AAAAABTOLFKRWVHI2DSMVQWIX3LMV43ASLTON2WKOZSG4ZTIMBRGA2DQMA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>