The following program causes stack overflow. Documentation suggests that block calls itself rather than the top-level "" template, so there should be no recursion.
runtime: goroutine stack exceeds 1000000000-byte limit
fatal error: stack overflow
runtime stack:
runtime.throw(0x50efd4, 0xe)
src/runtime/panic.go:566 +0x8b
runtime.newstack()
src/runtime/stack.go:1035 +0x3ef
runtime.morestack()
src/runtime/asm_amd64.s:366 +0x7f
goroutine 1 [running]:
text/template.(*state).evalCommand(0xc440100588, 0x0, 0x0, 0x0, 0xc4200ac300, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
src/text/template/exec.go:407 fp=0xc440100298 sp=0xc440100290
text/template.(*state).evalPipeline(0xc440100588, 0x0, 0x0, 0x0, 0xc4200ca0a0, 0x0, 0x0, 0x0)
src/text/template/exec.go:389 +0xdd fp=0xc440100380 sp=0xc440100298
text/template.(*state).walkTemplate(0xc440100588, 0x0, 0x0, 0x0, 0xc4200c8180)
src/text/template/exec.go:367 +0xe4 fp=0xc440100428 sp=0xc440100380
text/template.(*state).walk(0xc440100588, 0x0, 0x0, 0x0, 0x58f460, 0xc4200c8180)
src/text/template/exec.go:232 +0x22f fp=0xc4401004a8 sp=0xc440100428
text/template.(*state).walk(0xc440100588, 0x0, 0x0, 0x0, 0x58f220, 0xc4200ac2d0)
src/text/template/exec.go:227 +0x130 fp=0xc440100528 sp=0xc4401004a8
text/template.(*state).walkTemplate(0xc440100730, 0x0, 0x0, 0x0, 0xc4200c8180)
src/text/template/exec.go:372 +0x1e4 fp=0xc4401005d0 sp=0xc440100528
text/template.(*state).walk(0xc440100730, 0x0, 0x0, 0x0, 0x58f460, 0xc4200c8180)
src/text/template/exec.go:232 +0x22f fp=0xc440100650 sp=0xc4401005d0
text/template.(*state).walk(0xc440100730, 0x0, 0x0, 0x0, 0x58f220, 0xc4200ac2d0)
src/text/template/exec.go:227 +0x130 fp=0xc4401006d0 sp=0xc440100650
text/template.(*state).walkTemplate(0xc4401008d8, 0x0, 0x0, 0x0, 0xc4200c8180)
src/text/template/exec.go:372 +0x1e4 fp=0xc440100778 sp=0xc4401006d0
text/template.(*state).walk(0xc4401008d8, 0x0, 0x0, 0x0, 0x58f460, 0xc4200c8180)
src/text/template/exec.go:232 +0x22f fp=0xc4401007f8 sp=0xc440100778
text/template.(*state).walk(0xc4401008d8, 0x0, 0x0, 0x0, 0x58f220, 0xc4200ac2d0)
src/text/template/exec.go:227 +0x130 fp=0xc440100878 sp=0xc4401007f8
text/template.(*state).walkTemplate(0xc440100a80, 0x0, 0x0, 0x0, 0xc4200c8180)
src/text/template/exec.go:372 +0x1e4 fp=0xc440100920 sp=0xc440100878
text/template.(*state).walk(0xc440100a80, 0x0, 0x0, 0x0, 0x58f460, 0xc4200c8180)
src/text/template/exec.go:232 +0x22f fp=0xc4401009a0 sp=0xc440100920
text/template.(*state).walk(0xc440100a80, 0x0, 0x0, 0x0, 0x58f220, 0xc4200ac2d0)
src/text/template/exec.go:227 +0x130 fp=0xc440100a20 sp=0xc4401009a0
Found with go-fuzz.
go version devel +149ac34 Mon May 9 17:50:29 2016 +0000 linux/amd64
The following program causes stack overflow. Documentation suggests that block calls itself rather than the top-level "" template, so there should be no recursion.
Found with go-fuzz.