Failed to build for Quicklisp dist

[quicklisp]

Building with SBCL 2.0.9.5-442f54894 / ASDF 3.3.1 for quicklisp dist creation.

Commit id 9d0eddc981883c7106119c64bf41cc0806751fb3

slynk/fancy-inspector fails to build with the following error:

; caught WARNING:
;   Deprecated recursive use of (ASDF/OPERATE:OPERATE 'ASDF/LISP-ACTION:LOAD-OP '("slynk/util")) while visiting (ASDF/LISP-ACTION:COMPILE-OP "slynk/fancy-inspector" "../contrib/slynk-fancy-inspector") - please use proper dependencies instead
...
Unhandled UIOP/LISP-BUILD:COMPILE-FILE-ERROR in thread #<SB-THREAD:THREAD "main thread" RUNNING {1001A50103}>: COMPILE-FILE-ERROR while compiling #<CL-SOURCE-FILE "slynk/fancy-inspector" "../contrib/slynk-fancy-inspector">

slynk/profiler fails to build with the following error:

; caught ERROR:
;   READ error during COMPILE-FILE: Symbol "TO-LINE" not found in the SLYNK package. Line: 157, Column: 49, File-Position: 5538 Stream: #<SB-INT:FORM-TRACKING-STREAM for "file /home/quicklisp/quicklisp-controller/dist/build-cache/sly/73ef8fc2cce64e26e6a1d54bc6d30c624e5464e7/sly-20201006-git/contrib/slynk-profiler.lisp" {1006965453}>
...
Unhandled UIOP/LISP-BUILD:COMPILE-FILE-ERROR in thread #<SB-THREAD:THREAD "main thread" RUNNING {1001A50103}>: COMPILE-FILE-ERROR while compiling #<CL-SOURCE-FILE "slynk/profiler" "../contrib/slynk-profiler">

slynk/trace-dialog fails to build with the following error:

Unhandled TYPE-ERROR in thread #<SB-THREAD:THREAD "main thread" RUNNING {1001A50103}>: The value NIL is not of type SLYNK::CONNECTION

Full log here

[joaotavora]

Right, this is about your blog post that latest SBCL is super strict on type declarations in structs and stuff. Yeah, will fix this, thanks. If someone's reading this and would be kind enough to make this silly PR, much obliged ;-)