QImageReader will lock the file after calling canRead

Calling api canRead will block the file on windows 10 64bits. I attach a small project to reproduce the bug.

Things to noticed :

1 : copy img_links.txt to your shadow build folder

shadow_build
--debug
--release
--img_links.txt

2 : Create a folder "img" in shadow build folder

shadow_build
--debug
--release
--img

For more info, please go to https://forum.qt.io/topic/79789/cannot-rename-by-qfile-rename/9

static size_t num = 0;
QImageReader reader(name);
reader.setDecideFormatFromContent(true);
reader.canRead(); //after calling can read, the file will be locked
bool const can_rename = QFile::rename(name, QString("img/sos%1").arg(num++));
qDebug()<<"can rename:"<<can_rename;