Request textDocument/hover fails when top-level env key is incomplete

[PythonCoderAS]

Type: Bug

Making a workflow file like this:

name: Sample 1
on:
    - push
env:
jobs:
    test:
        runs-on: ubuntu-latest
        steps:
            - run: echo "Hello, ${{ env.TEST }}"

Causes the following error when hovering over the - run: line:

[Error - 4:08:42 PM] Request textDocument/hover failed.
  Message: Request textDocument/hover failed with message: Unexpected type 'NullToken' encountered while reading 'workflow env'. The type 'MappingToken' was expected.
  Code: -32603 

In contrast, none of these workflows cause the error:

name: Sample 1
on:
    - push
jobs:
    test:
        runs-on: ubuntu-latest
        env:
        steps:
            - run: echo "Hello, ${{ env.TEST }}"

name: Sample 1
on:
    - push
jobs:
    test:
        runs-on: ubuntu-latest
        steps:
            - run: echo "Hello, ${{ env.TEST }}"
              env:

Extension version: 0.27.1
VS Code version: Code 1.100.2 (848b80aeb52026648a8ff9f7c45a9b0a80641e2e, 2025-05-14T21:47:40.416Z)
OS version: Darwin arm64 24.4.0
Modes:

System Info

Item	Value
CPUs	Apple M4 Max (14 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	3, 4, 4
Memory (System)	36.00GB (2.98GB free)
Process Argv	--crash-reporter-id 1eb59a8f-a777-446b-b97e-fe7c3d092446
Screen Reader	no
VM	0%

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