Navigating in XML files causes Spacemacs to hang

[ghost]

I haven't (yet) experienced this issue myself, I just want to note that smartparens has been identified (in this bug report as the likely cause of unresponsive behaviour when editing XML files in Spacemacs.

Expected behavior

See https://github.com/syl20bnr/spacemacs/issues/7794#issuecomment-301729796 .

Actual behavior

See https://github.com/syl20bnr/spacemacs/issues/7794#issuecomment-301729796 .

Steps to reproduce the problem

See https://github.com/syl20bnr/spacemacs/issues/7794#issuecomment-301729796 .

Backtraces if necessary (M-x toggle-debug-on-error)

See https://github.com/syl20bnr/spacemacs/issues/7794#issuecomment-303737328

Environment & version information

• smartparens version:
• Active major-mode:
• Emacs version (M-x emacs-version): 24, 25, 26
• Spacemacs/Evil/Other starterkit (specify which)/Vanilla: Spacemacs
• OS: Windows 7 / Windows 10 / Linux mint (source)

[Fuco1]

This will probably be fixed by #756

[nivaca]

I can confirm the bug persists today (Melpa 20200324.2147). Smartparens is unusable with nXML mode. Whenever my point crosses any attribute name, Emacs momentarily hangs.