panic: syscall/js: call of Value.Int on undefined

[PaulKinlan]

[This isn't a problem with pdfcpu - but I'm looking for some guidance :)]
Hi, firstly I just wanted to say thank you for all the work here, it's help me get mostly up and running.

I have a golang program that has to Stat the file, and I'm getting a heap of errors like you've described but I can't seem to solve. Specifically it seems to fail with 'panic: syscall/js: call of Value.Int on undefined' and the stack trace points to an error when Go system library trys to read atimeMs, which I think is set by retStat.atimeMs = retStat.atime.getTime();

Have you experience any similar problems? I am trying to debug it but not getting amazingly far.

[julianfbeck]

Hey did you solve this?

[awfulcooking]

Dropping a note since I found this while trying to find impls of stat() on the JavaScript side.

Have just come from reading setStat in /usr/share/go-1.17/src/syscall/fs_js.go, groaning "oh God, we really do have to set all of those"...

(js.Value.Int() will panic if the JS value isn't a number)

func setStat(st *Stat_t, jsSt js.Value) {
	st.Dev = int64(jsSt.Get("dev").Int())
	st.Ino = uint64(jsSt.Get("ino").Int())
	st.Mode = uint32(jsSt.Get("mode").Int())
	st.Nlink = uint32(jsSt.Get("nlink").Int())
	st.Uid = uint32(jsSt.Get("uid").Int())
	st.Gid = uint32(jsSt.Get("gid").Int())
	st.Rdev = int64(jsSt.Get("rdev").Int())
	st.Size = int64(jsSt.Get("size").Int())
	st.Blksize = int32(jsSt.Get("blksize").Int())
	st.Blocks = int32(jsSt.Get("blocks").Int())
	atime := int64(jsSt.Get("atimeMs").Int())
	st.Atime = atime / 1000
	st.AtimeNsec = (atime % 1000) * 1000000
	mtime := int64(jsSt.Get("mtimeMs").Int())
	st.Mtime = mtime / 1000
	st.MtimeNsec = (mtime % 1000) * 1000000
	ctime := int64(jsSt.Get("ctimeMs").Int())
	st.Ctime = ctime / 1000
	st.CtimeNsec = (ctime % 1000) * 1000000
}