"index out of range" error after upgrading to 0.7.9 or 0.7.10

[evanleck]

Running the same command that worked with 0.7.8 now fails after upgrading to 0.7.9 or 0.7.10 with this error:

panic: runtime error: index out of range [0] with length 0

goroutine 614 [running]:
github.com/evanw/esbuild/internal/renamer.(*MinifyRenamer).NameForSymbol(0xc0013d50e0, 0x49, 0x19, 0x0)
	/Users/evan/dev/esbuild/internal/renamer/renamer.go:121 +0x1e5
github.com/evanw/esbuild/internal/js_printer.(*printer).printSymbol(0xc0016da9c0, 0x49)
	/Users/evan/dev/esbuild/internal/js_printer/js_printer.go:704 +0x5c
github.com/evanw/esbuild/internal/js_printer.(*printer).printBinding(0xc0016da9c0, 0x10000c0000000e6, 0x775a60, 0xc0002142d0)
	/Users/evan/dev/esbuild/internal/js_printer/js_printer.go:714 +0x1fe5
github.com/evanw/esbuild/internal/js_printer.(*printer).printFnArgs(0xc0016da9c0, 0xc00022e5c0, 0x1, 0x1, 0x0)
	/Users/evan/dev/esbuild/internal/js_printer/js_printer.go:924 +0x273
github.com/evanw/esbuild/internal/js_printer.(*printer).printFn(0xc0016da9c0, 0xc0002142c0, 0xe5, 0xc00022e5c0, 0x1, 0x1, 0xec, 0xc000223400, 0x1, 0x1, ...)
	/Users/evan/dev/esbuild/internal/js_printer/js_printer.go:940 +0x65
github.com/evanw/esbuild/internal/js_printer.(*printer).printStmt(0xc0016da9c0, 0xd4, 0x776180, 0xc002f32f00)
	/Users/evan/dev/esbuild/internal/js_printer/js_printer.go:2352 +0x8e99
github.com/evanw/esbuild/internal/js_printer.Print(0x50000004d, 0x0, 0x10000010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0028ba480, ...)
	/Users/evan/dev/esbuild/internal/js_printer/js_printer.go:2978 +0x405
github.com/evanw/esbuild/internal/bundler.(*linkerContext).generateCodeForFileInChunkJS(0xc00079c460, 0x776340, 0xc0013d50e0, 0xc002f600f0, 0x49, 0x1, 0xc002a600e0, 0x9, 0x9, 0xf00000000, ...)
	/Users/evan/dev/esbuild/internal/bundler/linker.go:3042 +0xc90
created by github.com/evanw/esbuild/internal/bundler.(*chunkReprJS).generate
	/Users/evan/dev/esbuild/internal/bundler/linker.go:3208 +0x85e

This is the command I'm running, though I've truncated the list of entry points since there are 72 total:

pnpx esbuild --minify --sourcemap --bundle --format=esm --splitting --target=es2019 '--define:process.env.NODE_ENV="development"' --outdir=public/assets assets/scripts/sidenav.js assets/scripts/loads.create.js assets/scripts/help.js ...

[evanw]

Thanks for reporting this, and sorry this is happening. I'd like to get this fixed ASAP. There haven't been many changes related to this code since 0.7.8. I suspect the fix for #421 may be related to this regression. This should be pretty easy to fix but I probably won't be able to fix it without a code sample that reproduces the problem, or at least more information about the code causing the error. Are you able to share a code sample that causes this problem?

[evanleck]

No worries, things happen! Thanks for getting to back to me so quickly! Mind if I email you a zip with the files to reproduce the error? My JS that's producing the error isn't particularly sensitive but it's not open source.

[evanw]

Yes, I don't mind. That works for me.