Using zig std shows runtime error

[sysprosrc]

Zig Version

0.15.0-dev.1519+dd4e25cf4

Steps to Reproduce and Observed Behavior

While trying to read the standard documentation offline I discovered that the Zig runtime shows error specifically when the program have to response to any client

Expected Behavior

It should output the file as a webpage with documentation about the Zig's standard library instead of a blank screen

[rohlem]

a zig std regression (probably the same one) is being tracked in #24760

[ifreund]

With #24864 I now get the following, slightly more helpful error:

$ ZIG_DEBUG_CMD=1 ./stage4/bin/zig std
http://127.0.0.1:46181/
error: unable to serve /sources.tar: BrokenPipe