Carl Henrik Lunde 3266c3654b Avoid race on renderer.buf in flush vs. write ...

Fix race by acquiring the mutex before accessing renderer.buf in flush.

	WARNING: DATA RACE
	Read at 0x00c0000ee0a0 by goroutine 11:
	  bytes.(*Buffer).Len()
	      /home/chlunde/opt/go/src/bytes/buffer.go:73 +0x64
	  github.com/charmbracelet/bubbletea.(*renderer).flush()
	      /home/chlunde/src/bubbletea/renderer.go:91 +0x45
	  github.com/charmbracelet/bubbletea.(*renderer).listen()
	      /home/chlunde/src/bubbletea/renderer.go:76 +0x185

	Previous write at 0x00c0000ee0a0 by main goroutine:
	  bytes.(*Buffer).Reset()
	      /home/chlunde/opt/go/src/bytes/buffer.go:98 +0xf5
	  github.com/charmbracelet/bubbletea.(*renderer).write()
	      /home/chlunde/src/bubbletea/renderer.go:195 +0x13c
	  github.com/charmbracelet/bubbletea.(*Program).Start()
	      /home/chlunde/src/bubbletea/tea.go:330 +0xbbb
	  main.main()
	      /home/chlunde/src/bubbletea/examples/spinner/main.go:27 +0x229

Fixes #54

2021-02-25 10:56:48 -05:00

11 KiB

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