✘ [ERROR] panic: runtime error: invalid memory address or nil pointer dereference (while parsing "<stdin>")

[nettybun]

Full reproduction from scratch:

❯ cd /tmp
❯ npm i esbuild fflate
added 3 packages, and audited 4 packages in 2s
found 0 vulnerabilities
❯ npm ls esbuild fflate
tmp@ /private/tmp
├── esbuild@0.17.8
└── fflate@0.7.4
❯ echo 'export { unzipSync } from "node_modules/fflate";' | esbuild --bundle --platform=neutral
✘ [ERROR] panic: runtime error: invalid memory address or nil pointer dereference (while parsing "<stdin>")

  debug.Stack (runtime/debug/stack.go:24)
  helpers.PrettyPrintedStack (internal/helpers/stack.go:9)
  bundler.parseFile.func1 (internal/bundler/bundler.go:189)
  panic (runtime/panic.go:884)
  resolver.resolverQuery.loadAsMainField (internal/resolver/resolver.go:1818)
  resolver.resolverQuery.loadAsFileOrDirectory (internal/resolver/resolver.go:1666)
  resolver.(*Resolver).ProbeResolvePackageAsRelative (internal/resolver/resolver.go:606)
  bundler.ResolveFailureErrorTextSuggestionNotes (internal/bundler/bundler.go:573)
  bundler.parseFile (internal/bundler/bundler.go:428)
  bundler.(*scanner).maybeParseFile (internal/bundler/bundler.go:1360)

1 error

This also happens in JS version:

const esbuild = require('esbuild');
esbuild.build({
    stdin: {
        contents: 'export { unzipSync } from "node_modules/fflate";',
    },
    bundle: true,
    platform: 'neutral',
});

Note this doesn't crash for from "fflate"; from "./node_modules/fflate"; or any even from "node_modules" and from "node_modules/doesntexist". It only crashes when there's a a node_module path that exists on disk and the platform=neutral.

Also there's nothing wrong with fflate - I don't mean to pick on that package it's just the one I happened to poke at right now.