go/src/text
Daniel Martí 218f4572f5 text/template: make reflect.Value indirections more robust
Always shadow or modify the original parameter name. With code like:

	func index(item reflect.Value, ... {
		v := indirectInterface(item)

It was possible to incorrectly use 'item' and 'v' later in the function,
which could result in subtle bugs. This is precisely the kind of mistake
that led to #36199.

Instead, don't keep both the old and new reflect.Value variables in
scope. Always shadow or modify the original variable.

While at it, simplify the signature of 'length', to receive a
reflect.Value directly and save a few redundant lines.

Change-Id: I01416636a9d49f81246d28b91aca6413b1ba1aa5
Reviewed-on: https://go-review.googlesource.com/c/go/+/212117
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Roberto Clapis <robclap8@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>
2020-02-24 09:16:18 +00:00
..
scanner text/scanner: remove AllowDigitSeparator flag again 2019-06-27 21:13:53 +00:00
tabwriter all: remove a few unused parameters 2019-04-29 13:31:54 +00:00
template text/template: make reflect.Value indirections more robust 2020-02-24 09:16:18 +00:00