v.builder: show the last line of the C compiler output, in case of er… #3417

	name: wasm backend CI

	on:
	push:
	paths:
	- 'cmd/tools/builders/**.v'
	- 'vlib/builtin/**.v'
	- 'vlib/v/ast/**.v'
	- 'vlib/v/scanner/**.v'
	- 'vlib/v/parser/**.v'
	- 'vlib/v/checker/**.v'
	- 'vlib/v/gen/c/**.v'
	- 'vlib/v/builder/**.v'
	- 'vlib/v/cflag/**.v'
	- 'vlib/v/live/**.v'
	- 'vlib/v/util/**.v'
	- 'vlib/v/markused/**.v'
	- 'vlib/v/preludes/**.v'
	- 'vlib/v/gen/wasm/**.v'
	- 'vlib/v/gen/wasm/tests/**.v'
	- '**/wasm_backend_ci.yml'
	pull_request:
	paths:
	- 'cmd/tools/builders/**.v'
	- 'vlib/builtin/**.v'
	- 'vlib/v/ast/**.v'
	- 'vlib/v/scanner/**.v'
	- 'vlib/v/parser/**.v'
	- 'vlib/v/checker/**.v'
	- 'vlib/v/gen/c/**.v'
	- 'vlib/v/builder/**.v'
	- 'vlib/v/cflag/**.v'
	- 'vlib/v/live/**.v'
	- 'vlib/v/util/**.v'
	- 'vlib/v/markused/**.v'
	- 'vlib/v/preludes/**.v'
	- 'vlib/v/gen/wasm/**.v'
	- 'vlib/v/gen/wasm/tests/**.v'
	- '**/wasm_backend_ci.yml'

	concurrency:
	group: wasm-${{ github.workflow }}-${{ github.ref == 'refs/heads/master' && github.sha \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	wasm-backend:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-22.04, windows-2022]
	fail-fast: false
	timeout-minutes: 10
	env:
	VTEST_ONLY: wasm
	steps:
	- uses: actions/checkout@v4
	- name: Build V
	if: runner.os != 'Windows'
	run: make -j4
	- name: Build V (Windows)
	if: runner.os == 'Windows'
	run: ./make.bat
	- name: Build examples
	run: ./v -silent build-examples
	- name: Setup Wasmer
	uses: wasmerio/[email protected]
	- name: Test the WASM backend
	run: ./v -silent test vlib/v/gen/wasm/tests/

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