missing details from error for commit of invalid .product

[JanZerebecki]

Issue Description

When committing a change to a .product file with invald xml the error message is missing the details.

Expected Result

_product $ osc commit
Sending some.product
Server returned an error: HTTP Error 400: Bad Request
FAILED: Unable to parse /bs/sources/:upload/expandproduct_20294/some.product: 
-:114: parser error : Opening and ending tag mismatch: include line 110 and packagelist
       </packagelist>
                     ^
-:115: parser error : Opening and ending tag mismatch: packagelist line 109 and group
    </group>
            ^
-:130: parser error : Opening and ending tag mismatch: group line 108 and productdefinition
</productdefinition>
                    ^
-:131: parser error : Premature end of data in tag productdefinition line 2

^

The file in question was https://gist.github.com/brett060102/d2df730b8b992f2b5053e7b60adbdb45 and I copied in the error message from running xmllint on that file.

How to Reproduce

$ osc bco some:procject/_product

# remove a / from a self closing element in some.product

_product $ osc commit
Sending some.product
Server returned an error: HTTP Error 400: Bad Request
FAILED: Unable to parse /bs/sources/:upload/expandproduct_20294/some.product: 

The error message is cut short.

Further Information

• A link to an OBS instance showing the issue: build.suse.de

[JanZerebecki]

The message originates here:

open-build-service/src/backend/bs_productconvert

Line 92 in 7d137d2

die("FAILED: Unable to parse $filename: $@");

Maybe the error details are passed somewhere else or the error reporting of the xml parser needs to be enabled.