[Bug] Terser removes reassignment to const #1284

Bug report

Version (complete output of terser -V or specific git commit)

$ terser -V
terser 5.15.1

Complete CLI command or minify() options used
I turned off the unsafe option.

$ terser input.js -c unsafe=false

terser input

try { const x = 0; x = x; } catch { console.log("caught"); }

terser output or error

try{}catch{console.log("caught")}

Expected result
Executing the output code, caught is expected to be printed since catch block is executed in the input code (assignment to constant variable).
However, nothing is printed running the output code.
It seems that Terser compresses assignment expressions which might have side effects.

$ node -e 'try { const x = 0; x = x; } catch { console.log("caught"); }' // input code
caught
$ node -e 'try{}catch{console.log("caught")}' // output code