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fmt: document that self-recursive data structures can be fatal

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Fixes #8241.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/144420043
This commit is contained in:
Rob Pike 2014-09-22 15:35:25 -07:00
parent 1392276bfb
commit 892b5074f5
1 changed files with 4 additions and 0 deletions
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4
src/fmt/doc.go
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@ -147,6 +147,10 @@
func (x X) String() string { return Sprintf("<%s>", x) }
convert the value before recurring:
func (x X) String() string { return Sprintf("<%s>", string(x)) }
Infinite recursion can also be triggered by self-referential data
structures, such as a slice that contains itself as an element, if
that type has a String method. Such pathologies are rare, however,
and the package does not protect against them.
Explicit argument indexes: