UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.97 Safari/537.36 Vivaldi/1.94.1008.36

Steps to reproduce the problem:
1. Add a BMP with a bad alignment (it is supposed to be 4 byte alignment for the data) as a background resource for setup.rc (or other resource file). In this case this is a background for the Vivaldi Browser installer.
2. try to build (customized) setup.exe using new rc.py tool
3. 

What is the expected behavior?
1) The chromium rc.exe and Visual Studio rc.exe outputs should match
2) (when ignoring toolwrapper assert) The resulting executable should link

What went wrong?
1) There is a 2 byte mismatch between the two rc.exe version' output, triggering an assert in the toolwrapper and build failure

2) Linking the executable results in Link error about corrupt files and "CVTRES : fatal error CVT1110: resource type or name string exceeds limit of 65535"

Did this work before? Yes 63.0.3202.84

Chrome version: 64.0.3282.22  Channel: dev
OS Version: 10.0
Flash Version: 

Nico Weber have already analyzed and fixed the issue in https://github.com/nico/hack/commit/76cb2fde80f9bab0bfb4e4e57bdabb26577c6aab

According to my information the tool used to create and/or convert the file to BMP was Photoshop on Mac. For reference, our git history shows that the image file increased by two bytes in an update in 2015, don't know the reason for this increase, this size was kept when updated earlier in 2017.

At present I have hardcoded an override to use the Visual Studio rc.exe output instead for this rc file.
 

Deleted: installer_bg.zip 11.0 KB

installer_bg.zip 11.0 KB Download