Invalid numeric literal error when the input preceded by non-json line

[arbitrary-dev]

Describe the bug
There's an invalid numeric literal error when the input preceded by non-json line.

To Reproduce

$ cat broken.json; echo -n "\nJQ output:\n\n"; jq -Rr 'fromjson // .' broken.json
dummy
{"wat-da":100}
{"work-dat":"100"}

JQ output:

jq: error (at broken.json:1): Invalid numeric literal at EOF at line 1, column 5 (while parsing 'dummy')
jq: error (at broken.json:2): Invalid numeric literal at line 1, column 14 (while parsing '{"wat-da":100}')
{
  "work-dat": "100"
}

$ cat moved.json; echo -n "\nJQ output:\n\n"; jq -Rr 'fromjson // .' moved.json  
{"wat-da":100}
{"work-dat":"100"}
dummy

JQ output:

{
  "wat-da": 100
}
{
  "work-dat": "100"
}
jq: error (at moved.json:3): Invalid numeric literal at EOF at line 1, column 5 (while parsing 'dummy')

Expected behavior

$ cat broken.json; echo -n "\nJQ output:\n\n"; jq -Rr 'fromjson // .' broken.json
dummy
{"wat-da":100}
{"work-dat":"100"}

JQ output:

jq: error (at broken.json:1): Invalid numeric literal at EOF at line 1, column 5 (while parsing 'dummy')
{
  "wat-da": 100
}
{
  "work-dat": "100"
}

Environment (please complete the following information):

• OS and Version: Gentoo Linux
• jq version:

$ jq --version
jq--

$ equery l jq
* Searching for jq ...
[IP-] [  ] app-misc/jq-1.7_pre20201109:0

[wader]

Seems similar to #2400?

[arbitrary-dev]

Could be.

[thalman]

It is definitely connected. I just tested it and #2400 fixes this issue too.

[itchyny]

This bug was fixed by #2400 (c4d39c4).