bug#42088: [feature/native-comp] Lockup on opening TypeScript files

[Sebastian Sturm]

Apologies in advance for this being a very vague bug report, but I don't 
know how to properly debug this kind of issue (pointers appreciated!)

I find that, using the latest version of gccemacs (commit 
#801e19d0ba8e048...) and typescript.el (commit #0fc729787007b5111f...) 
Emacs will lock up with 100% cpu usage whenever a TypeScript file is 
opened. Interrupting Emacs using SIGUSR2 produces the following backtrace:

Debugger entered--entering a function:
* #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_10>()
  typescript--ensure-cache(515)
  typescript--class-decl-matcher(515)
  font-lock-fontify-keywords-region(1 515 nil)
  font-lock-default-fontify-region(1 501 nil)
  font-lock-fontify-region(1 501)
  #f(compiled-function (fun) #<bytecode 
0x58bf2cebcbf23b5>)(font-lock-fontify-region)
  jit-lock--run-functions(1 501)
  jit-lock-fontify-now(1 501)
  jit-lock-function(1)
  redisplay_internal\ \(C\ function\)()

I didn't spot any literal lambda within typescript--ensure-cache so I 
assume it's being generated by some macro? Adding the melpa package 
repository to the gccemacs docker image, installing typescript-mode and 
opening a .ts file also causes the Docker version to lock up with 100% 
CPU usage so I assume this is not caused by my config (trying to send 
SIGUSR2 to emacs terminated the entire container).
If there's anything I can try out to debug this issue, I'll gladly do so.

Thanks for your amazing work on gccemacs!
Sebastian

The following is extracted from the template produced by 
report-emacs-bug, though given that the Docker image locks up too, I 
guess most of it isn't of interest anyway:

In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 
3.22.30, cairo version 1.15.10)
 of 2020-06-27 built on cartman
Repository revision: 801e19d0ba8e048a9faa5d5169ec4183e41b0148
Repository branch: feature/native-comp
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Linux Mint 19.1

Recent messages:
Doom loaded 235 packages across 53 modules in 0.672s
Waiting for git... [2 times]
Loading /home/sebastian/.emacs.d/.local/cache/recentf...done
+Word-Wrap mode enabled in current buffer
current-kill: Kill ring is empty
Mark set [9 times]

Configured using:
 'configure --prefix=/usr/local/stow/gccemacs CC=gcc-10 'CFLAGS=-O3
 -mtune=native -march=native -DNDEBUG' --with-nativecomp'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS JSON PDUMPER
LCMS2 GMP

Important settings:
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8