internal/lsp/cache: handle nil pointer exception in missing module error
Fixes golang/go#42349
Change-Id: I171495005298b8f55ae75ded5c2f40e457748082
Reviewed-on: https://go-review.googlesource.com/c/tools/+/267118
Trust: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
diff --git a/internal/lsp/cache/mod_tidy.go b/internal/lsp/cache/mod_tidy.go
index e4934f4..cfe299b 100644
--- a/internal/lsp/cache/mod_tidy.go
+++ b/internal/lsp/cache/mod_tidy.go
@@ -415,10 +415,15 @@
}
func missingModuleError(snapshot source.Snapshot, pm *source.ParsedModule, req *modfile.Require) (source.Error, error) {
- start, end := pm.File.Module.Syntax.Span()
- rng, err := rangeFromPositions(pm.Mapper, start, end)
- if err != nil {
- return source.Error{}, err
+ var rng protocol.Range
+ // Default to the start of the file if there is no module declaration.
+ if pm.File != nil && pm.File.Module != nil && pm.File.Module.Syntax != nil {
+ start, end := pm.File.Module.Syntax.Span()
+ var err error
+ rng, err = rangeFromPositions(pm.Mapper, start, end)
+ if err != nil {
+ return source.Error{}, err
+ }
}
args, err := source.MarshalArgs(pm.Mapper.URI, []string{req.Mod.Path + "@" + req.Mod.Version})
if err != nil {
