diff options
author | Austin Clements <austin@google.com> | 2016-10-03 11:52:20 -0400 |
---|---|---|
committer | Austin Clements <austin@google.com> | 2016-10-03 16:12:48 +0000 |
commit | 99339dd44537f82c9a1348b8937b68b6c61be005 (patch) | |
tree | f45ae64fc77cd63517041d3e268becba5edad355 /src/runtime/mfinal.go | |
parent | 22a2bdfedb95612984cec3141924953b88a607b7 (diff) | |
download | go-99339dd44537f82c9a1348b8937b68b6c61be005.tar.gz go-99339dd44537f82c9a1348b8937b68b6c61be005.zip |
runtime: weaken claim about SetFinalizer panicking
Currently the SetFinalizer documentation makes a strong claim that
SetFinalizer will panic if the pointer is not to an object allocated
by calling new, to a composite literal, or to a local variable. This
is not true. For example, it doesn't panic when passed the address of
a package-level variable. Nor can we practically make it true. For
example, we can't distinguish between passing a pointer to a composite
literal and passing a pointer to its first field.
Hence, weaken the guarantee to say that it "may" panic.
Updates #17311. (Might fix it, depending on what we want to do with
package-level variables.)
Change-Id: I1c68ea9d0a5bbd3dd1b7ce329d92b0f05e2e0877
Reviewed-on: https://go-review.googlesource.com/30137
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Diffstat (limited to 'src/runtime/mfinal.go')
-rw-r--r-- | src/runtime/mfinal.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/runtime/mfinal.go b/src/runtime/mfinal.go index b3f30dd5ae..f9344882b1 100644 --- a/src/runtime/mfinal.go +++ b/src/runtime/mfinal.go @@ -231,7 +231,7 @@ func runfinq() { // address of a local variable. // The argument finalizer must be a function that takes a single argument // to which obj's type can be assigned, and can have arbitrary ignored return -// values. If either of these is not true, SetFinalizer aborts the +// values. If either of these is not true, SetFinalizer may abort the // program. // // Finalizers are run in dependency order: if A points at B, both have |