Prevent panic when referencing a Bake variable with no value

Signed-off-by: Remy Suen <remy.suen@docker.com>

Author: rcjsuen

CHANGELOG.md

@@ -2,6 +2,13 @@
 
 All notable changes to the Docker Language Server will be documented in this file.
 
+## [Unreleased]
+
+### Fixed
+
+- Bake
+  - fix parsing error caused by referencing a variable with no value ([#490](https://github.com/docker/docker-language-server/issues/490))
+
 ## [0.20.1] - 2025-10-14
 
 ### Fixed

go.mod

@@ -5,64 +5,64 @@ go 1.25.0
 require (
 	github.com/bep/debounce v1.2.1
 	github.com/bugsnag/bugsnag-go v2.5.1+incompatible
-	github.com/compose-spec/compose-go/v2 v2.9.0
-	github.com/docker/buildx v0.29.0
+	github.com/compose-spec/compose-go/v2 v2.9.1
+	github.com/docker/buildx v0.30.1
 	github.com/dromara/carbon/v2 v2.6.11
 	github.com/go-git/go-git/v5 v5.14.0
 	github.com/goccy/go-yaml v1.18.0
 	github.com/hashicorp/hcl-lang v0.0.0-20250210193002-b2ec3be7c1b8
 	github.com/hashicorp/hcl/v2 v2.24.0
-	github.com/moby/buildkit v0.25.0 // master
+	github.com/moby/buildkit v0.26.1 // master
 	github.com/santhosh-tekuri/jsonschema/v6 v6.0.1
 	github.com/sourcegraph/jsonrpc2 v0.2.0
 	github.com/spf13/cobra v1.10.1
-	github.com/stretchr/testify v1.11.0
+	github.com/stretchr/testify v1.11.1
 	github.com/tliron/commonlog v0.2.18
 	github.com/zclconf/go-cty v1.17.0
 	go.lsp.dev/uri v0.3.0
 )
 
 require (
-	dario.cat/mergo v1.0.1 // indirect
+	dario.cat/mergo v1.0.2 // indirect
 	github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/ProtonMail/go-crypto v1.1.5 // indirect
+	github.com/ProtonMail/go-crypto v1.3.0 // indirect
 	github.com/agext/levenshtein v1.2.3 // indirect
 	github.com/apparentlymart/go-cidr v1.0.1 // indirect
 	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.30.3 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.27.27 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.17.27 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.11 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.15 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.15 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.0 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.17 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.22.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.30.3 // indirect
-	github.com/aws/smithy-go v1.20.3 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.38.1 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.31.3 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.18.7 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.4 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.4 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.4 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.0 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.28.2 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.34.0 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.38.0 // indirect
+	github.com/aws/smithy-go v1.22.5 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/bitly/go-simplejson v0.5.1 // indirect
 	github.com/bugsnag/panicwrap v1.3.4 // indirect
-	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/cloudflare/circl v1.6.0 // indirect
 	github.com/containerd/console v1.0.5 // indirect
-	github.com/containerd/containerd/api v1.9.0 // indirect
-	github.com/containerd/containerd/v2 v2.1.4 // indirect
+	github.com/containerd/containerd/api v1.10.0 // indirect
+	github.com/containerd/containerd/v2 v2.2.1-0.20251115011841-efd86f2b0bc2 // indirect
 	github.com/containerd/continuity v0.4.5 // indirect
 	github.com/containerd/errdefs v1.0.0 // indirect
 	github.com/containerd/errdefs/pkg v0.3.0 // indirect
 	github.com/containerd/log v0.1.0 // indirect
-	github.com/containerd/platforms v1.0.0-rc.1 // indirect
+	github.com/containerd/platforms v1.0.0-rc.2 // indirect
 	github.com/containerd/ttrpc v1.2.7 // indirect
 	github.com/containerd/typeurl/v2 v2.2.3 // indirect
 	github.com/cyphar/filepath-securejoin v0.4.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/distribution/reference v0.6.0 // indirect
-	github.com/docker/cli v28.4.0+incompatible // indirect
-	github.com/docker/docker v28.4.0+incompatible // indirect
+	github.com/docker/cli v28.5.1+incompatible // indirect
+	github.com/docker/docker v28.5.1+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.9.3 // indirect
 	github.com/docker/go v1.5.1-1.0.20160303222718-d30aec9fd63c // indirect
 	github.com/docker/go-connections v0.5.0 // indirect
@@ -72,18 +72,18 @@ require (
 	github.com/fvbommel/sortorder v1.0.1 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
 	github.com/go-git/go-billy/v5 v5.6.2 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/gofrs/flock v0.12.1 // indirect
+	github.com/gofrs/flock v0.13.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/mux v1.8.1 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.26.1 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-cty-funcs v0.0.0-20250818135842-6aab67130928 // indirect
@@ -94,7 +94,7 @@ require (
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
 	github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0 // indirect
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
-	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/compress v1.18.1 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.16 // indirect
@@ -121,7 +121,7 @@ require (
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/sasha-s/go-deadlock v0.3.5 // indirect
-	github.com/secure-systems-lab/go-securesystemslib v0.6.0 // indirect
+	github.com/secure-systems-lab/go-securesystemslib v0.9.1 // indirect
 	github.com/segmentio/ksuid v1.0.4 // indirect
 	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
 	github.com/shibumi/go-pathspec v1.3.0 // indirect
@@ -136,33 +136,33 @@ require (
 	github.com/tonistiigi/vt100 v0.0.0-20240514184818-90bafcd6abab // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
-	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.60.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.60.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.60.0 // indirect
-	go.opentelemetry.io/otel v1.35.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.35.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.35.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.35.0 // indirect
-	go.opentelemetry.io/otel/metric v1.35.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.35.0 // indirect
-	go.opentelemetry.io/otel/sdk/metric v1.35.0 // indirect
-	go.opentelemetry.io/otel/trace v1.35.0 // indirect
-	go.opentelemetry.io/proto/otlp v1.5.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.61.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.61.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.61.0 // indirect
+	go.opentelemetry.io/otel v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0 // indirect
+	go.opentelemetry.io/otel/metric v1.38.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.38.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.38.0 // indirect
+	go.opentelemetry.io/otel/trace v1.38.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.7.1 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/crypto v0.38.0 // indirect
-	golang.org/x/mod v0.24.0 // indirect
-	golang.org/x/net v0.39.0 // indirect
-	golang.org/x/sync v0.16.0 // indirect
-	golang.org/x/sys v0.33.0 // indirect
-	golang.org/x/term v0.32.0 // indirect
-	golang.org/x/text v0.25.0 // indirect
-	golang.org/x/time v0.11.0 // indirect
-	golang.org/x/tools v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20250218202821-56aae31c358a // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a // indirect
-	google.golang.org/grpc v1.72.2 // indirect
-	google.golang.org/protobuf v1.36.9 // indirect
+	golang.org/x/crypto v0.42.0 // indirect
+	golang.org/x/mod v0.29.0 // indirect
+	golang.org/x/net v0.44.0 // indirect
+	golang.org/x/sync v0.17.0 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/term v0.35.0 // indirect
+	golang.org/x/text v0.29.0 // indirect
+	golang.org/x/time v0.14.0 // indirect
+	golang.org/x/tools v0.37.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250825161204-c5933d9347a5 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250825161204-c5933d9347a5 // indirect
+	google.golang.org/grpc v1.76.0 // indirect
+	google.golang.org/protobuf v1.36.10 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )