Unexpected build-arg causes image to have no name or tag

First reported at docker/docker#23409

An unexpected build-arg does not raise any errors, but causes the resulting image to have no tag.

[shin-]

Ah, right, sorry.

First off, just to clarify for myself and others, the leftover image issue also happens while using the Docker CLI, as far as I can tell:

$ docker build --build-arg foo=hello --build-arg bar=world .
Sending build context to Docker daemon 2.048 kB
Step 1 : FROM alpine
 ---> 13e1761bf172
Step 2 : MAINTAINER Joffrey F <[e-mail]>
 ---> Running in 9c605066ca55
 ---> cb7211f9bf95
Removing intermediate container 9c605066ca55
Step 3 : ARG foo
 ---> Running in 8f99338e84db
 ---> 2210f554aa58
Removing intermediate container 8f99338e84db
Step 4 : RUN echo ${foo}
 ---> Running in a1a5c60a7331
hello
 ---> 455c57454e96
Removing intermediate container a1a5c60a7331
One or more build-args [bar] were not consumed, failing build.
$ docker images
REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
<none>                      <none>              455c57454e96        5 seconds ago       4.797 MB

As for the matter of detecting build errors - the library will not do it for you. You would have to parse the stream and detect the line(s) that indicate failure (typically a JSON object containing an error key)

[duplessisaa]

Hi guys, same exact error here…

How do I solve it ?