Bun fails with Malformed_HTTP_Response when header name contains question mark

[hrgdavor]

What version of Bun is running?

1.1.42+50eec0025

What platform is your computer?

Linux 4.18.0-372.32.1.el8_6.x86_64 x86_64 x86_64

What steps can reproduce the bug?

use netcat to fake a web server and return following

HTTP/1.1 200 OK
Access-Control-Allow-Method?: *
Content-Type: text/plain
Content-Length: 1

A

This silly bug was caused by wrong header name in code using jettty (':' was converted to '?')

resp.setHeader("Access-Control-Allow-Method:", "*");

Problem 1 is that source setting header on java side and output were different
problem 2 is that bun did not report detail of which header is invalid, just a generic error

What is the expected behavior?

• a) ignore the header (print warning in verbose)
• b) throw error saying which header name is wrong

What do you see instead?

generic error Malformed_HTTP_Response

Additional information

No response

[hrgdavor]

Also, tested with node 23. it simply ignores invalid headers. So this would be preferred solution.