Panic gziping on .Get request

[hcoura]

I am getting sometimes a weird panic, during get requests, here is the stack trace stripped of company specific references, the trigger for this is a simple s.client.R().Get() that gets a gzipped response, my assumption is that at times this response is empty or broken and in someway triggering the nil pointer dereference

panic: runtime error: invalid memory address or nil pointer dereference
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x662b99]
goroutine 104 [running]:
resty.dev/v3.(*Request).Execute.func1()
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/request.go:1368 +0xb5
panic({0xd456e0?, 0x164b9b0?})
/usr/local/go/src/runtime/panic.go:791 +0x132
compress/flate.(*decompressor).huffSym(0xc001b1b308, 0xc001b1bb60)
/usr/local/go/src/compress/flate/inflate.go:720 +0xf9
compress/flate.(*decompressor).huffmanBlock(0xc001b1b308?)
/usr/local/go/src/compress/flate/inflate.go:565 +0x405
compress/flate.(*decompressor).nextBlock(0xc001b1b308)
/usr/local/go/src/compress/flate/inflate.go:328 +0x178
compress/flate.(*decompressor).Read(0xc001b1b308, {0xc005ccc800, 0x200, 0xf198e8?})
/usr/local/go/src/compress/flate/inflate.go:348 +0x5b
compress/gzip.(*Reader).Read(0xc00df09b88, {0xc005ccc800, 0x200, 0x200})
/usr/local/go/src/compress/gzip/gunzip.go:252 +0xa2
resty.dev/v3.(*gzipReader).Read(0x0?, {0xc005ccc800?, 0xc0052471a0?, 0x46ffa9?})
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/stream.go:98 +0x1c
resty.dev/v3.(*limitReadCloser).Read(0xc009b905a0, {0xc005ccc800?, 0x9e1c51?, 0xc000073508?})
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/stream.go:145 +0xa2
io.ReadAll({0x7f2310dfa6f0, 0xc009b905a0})
/usr/local/go/src/io/io.go:712 +0x7e
resty.dev/v3.(*Response).readAll(0xc00e32bb90)
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/response.go:238 +0x94
resty.dev/v3.(*Response).readIfRequired(...)
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/response.go:222
resty.dev/v3.(*Response).String(0xc00e32bb90)
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/response.go:104 +0x2c
...
resty.dev/v3.(*Request).Execute(0xc00dac5b88, {0xe9e1fb?, 0x1?}, {0xedd8be, 0x43})
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/request.go:1429 +0xb19
resty.dev/v3.(*Request).Get(...)
/go/pkg/mod/resty.dev/v3@v3.0.0-beta.2/request.go:1293
...

I don't have an easy way to repro as it's not happening that often, but it's triggering annoying server restarts, figured I would report and in case you have seen it before I would appreciate any pointers.

I will probably try to downgrade to v2 next week and see if it happens there too

[jeevatkm]

@hcoura Thanks for reporting it. I will analyze and figure it out.