"qmake -install sed" fails on input with CR+LF (0x0D+0x0A) newlines

I am trying to use qmake's poor man's sed feature on QtWasm's wasm_shell.html. It generates the processed output but continues to add endless garbage data.

The reason for it is that QTextStream::atEnd() in doSed() always returns false.

The attached wasm_shell.html is what the Qt SDK installer installed on my Windows machine. It has CR+LF newlines. If I change the newlines of the input file to LF, the issue is gone. Alternatively, if I change the fopen mode from "r" to "rb", the issue is also gone (hint by cadam).

How to reproduce with the attached files:

Works with LF-only:

qmake.exe -install sed -e s/@APPNAME@/untitled41/g wasm_shell_lf.html

Fails with CR+LF:

qmake.exe -install sed -e s/@APPNAME@/untitled41/g wasm_shell_cr_lf.html