CSS minification: fatal error: stack overflow

[dloebl]

Reproducer:

echo "&,a{.b{c" | esbuild --target=safari11 --loader=css

Output:

runtime: goroutine stack exceeds 1000000000-byte limit
runtime: sp=0x140202e03a0 stack=[0x140202e0000, 0x140402e0000]
fatal error: stack overflow

runtime stack:
runtime.throw({0x102b5a50d?, 0x102f17ba0?})
	runtime/panic.go:1047 +0x40 fp=0x16d8ead20 sp=0x16d8eacf0 pc=0x102773b60
runtime.newstack()
	runtime/stack.go:1105 +0x468 fp=0x16d8eaed0 sp=0x16d8ead20 pc=0x10278e128
runtime.morestack()
	runtime/asm_arm64.s:316 +0x70 fp=0x16d8eaed0 sp=0x16d8eaed0 pc=0x1027a5960

goroutine 35 [running]:
github.com/evanw/esbuild/internal/css_lexer.WouldStartIdentifierWithoutEscapes({0x102b5386f, 0x2})
	github.com/evanw/esbuild/internal/css_lexer/css_lexer.go:565 +0x14c fp=0x140202e03a0 sp=0x140202e03a0 pc=0x10297f0cc
github.com/evanw/esbuild/internal/css_printer.(*printer).printIdent(0x140402dfa18, {0x102b5386f, 0x2}, 0x0?, 0x1)
	github.com/evanw/esbuild/internal/css_printer/css_printer.go:661 +0x13c fp=0x140202e0400 sp=0x140202e03a0 pc=0x102aac61c
github.com/evanw/esbuild/internal/css_printer.(*printer).printTokens(0x140402dfa18, {0x1400016e180, 0x4, 0x100?}, {0x0?, 0x0?})
	github.com/evanw/esbuild/internal/css_printer/css_printer.go:779 +0x68c fp=0x140202e0550 sp=0x140202e0400 pc=0x102aad07c
github.com/evanw/esbuild/internal/css_printer.(*printer).printTokens(0x140402dfa18, {0x1400016e180, 0x4, 0x100?}, {0x0?, 0x0?})
	github.com/evanw/esbuild/internal/css_printer/css_printer.go:823 +0xae8 fp=0x140202e06a0 sp=0x140202e0550 pc=0x102aad4d8
github.com/evanw/esbuild/internal/css_printer.(*printer).printTokens(0x140402dfa18, {0x1400016e180, 0x4, 0x100?}, {0x0?, 0x0?})
[..]

Version:

$ esbuild --version
0.17.16