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math/rand: deprecate Seed

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Programs that call Seed and then expect a specific sequence
of results from the global random source (using functions such as Int)
can be broken when a dependency changes how much it consumes
from the global random source. To avoid such breakages, programs
that need a specific result sequence should use NewRand(NewSource(seed))
to obtain a random generator that other packages cannot access.

Fixes #56319.

Change-Id: Idac33991b719d2c71f109f51dacb3467a649e01e
Reviewed-on: https://go-review.googlesource.com/c/go/+/451375
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
This commit is contained in:
Russ Cox 2022-11-16 12:04:32 -05:00
parent e6eaf39cfa
commit ad7dc8ad55
1 changed files with 1 additions and 1 deletions
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2
src/math/rand/rand.go
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@ -315,7 +315,7 @@ var globalRand = New(new(lockedSource))
// Alternately, set GODEBUG=randautoseed=0 in the environment
// before making any calls to functions in this package.
//
// Note: Programs that call Seed and then expect a specific sequence
// Deprecated: Programs that call Seed and then expect a specific sequence
// of results from the global random source (using functions such as Int)
// can be broken when a dependency changes how much it consumes
// from the global random source. To avoid such breakages, programs