We see that line number reporting varies by browser when we catch dynamic module syntax errors. (We note how to load a revised Mech as we interpret these signals.)
plan
Show the error message in all cases.
unexpected token: '{'Show the offending line if identified by either err.line or err.lineNumber.
unexpected token: '{'
(links||[]).forEach({slug}) {Show character position when identified by err.columnNumber.
unexpected token: '{'
(links||[]).forEach({slug}) x{.
Safari (Option-Command-E)
Version 26.2 (21623.1.14.11.9)
Firefox (see mozilla 
)
149.0.2 (64-bit)
Chrome (Empty Cache and Hard Reload)
Version 146.0.7680.178 (Official Build) (x86_64)