The builders have recently started showing a number of timeouts running `TestCompareStrings`. Why? In case it's a compiler issue, CC @randall77 @josharian @martisch [2018-10-30T16:23:44-f570b54/solaris-amd64-oraclerel](https://build.golang.org/log/77f95b5f09c1b791847ee8b00033f31c1884ca49) [2018-10-30T17:09:42-5168fcf/freebsd-amd64-12_0](https://build.golang.org/log/c7f383aae3611d98adb58e5382b2e10c72819331) [2018-10-30T17:45:19-f14067f/darwin-amd64-10_10](https://build.golang.org/log/4b13a566d02971449ee6748ad2c9dc001e54e53f) [2018-10-30T17:45:19-f14067f/freebsd-amd64-10_3](https://build.golang.org/log/76a55e2532b60cf5ace31df222770c411a984cbe) [2018-10-31T13:47:42-49dafc7/darwin-amd64-10_11](https://build.golang.org/log/553fac1a3c8bf5d51056a1d3bec3ddbbaa48613e) [2018-10-31T13:47:42-49dafc7/windows-amd64-race](https://build.golang.org/log/ec44c884a3101e97dde5616f9dea49e37f770658) [2018-10-31T13:55:01-e8ffb8a/windows-amd64-race](https://build.golang.org/log/23d909b703032b298851dbe19ef68ec94c0b610f) [2018-10-31T15:07:05-53856c4/darwin-amd64-10_12](https://build.golang.org/log/c5d0b65707567b8a82fbe0e0637a6db449c0624b) [2018-10-31T16:11:20-cb07f49/darwin-amd64-10_11](https://build.golang.org/log/55a43ae082b0e01627d56bc7b32210cfe3ef08d7) [2018-10-31T16:11:20-cb07f49/darwin-amd64-10_12](https://build.golang.org/log/68ff9a8f16d41bd7485983b581b461fbe7bbde6c) [2018-10-31T16:11:20-cb07f49/windows-amd64-race](https://build.golang.org/log/a2b98679114f482667b671a482d49c39511bb923) [2018-10-31T16:29:40-86ad85c/darwin-amd64-10_12](https://build.golang.org/log/da87463a4bfd5de3b35c9c604efe73b6803b4170) [2018-10-31T19:29:56-f6f27bf/windows-amd64-race](https://build.golang.org/log/c64edac6efa5548f7563ffead191e434bd19ad72) [2018-10-31T22:14:09-d086c5c/darwin-amd64-10_10](https://build.golang.org/log/7edc6534453eea01e80e20583acf69e32a3dc11b) [2018-10-31T22:48:13-4b05c01/freebsd-amd64-10_3](https://build.golang.org/log/1a57bcb940e66707add79539b36f582e40dfde8f) [2018-11-01T00:54:46-01f0dbb/windows-amd64-race](https://build.golang.org/log/b0ae1590527452904271e6f5904e8e0182686674) [2018-11-01T08:36:12-6c9b655/darwin-amd64-10_12](https://build.golang.org/log/a8c4c579a3e886bc279db8df52107a4ce0fa59e8) [2018-11-01T14:38:45-21d2e15/darwin-amd64-10_11](https://build.golang.org/log/0c48127857b0540bc5928f5d63ad27d1706b2eed) [2018-11-01T15:56:48-0ff6e5f/dragonfly-amd64](https://build.golang.org/log/a31c88676097038ee1ee4dc55347f83ecedc1b9a) [2018-11-02T00:52:46-914a25c/windows-amd64-race](https://build.golang.org/log/0c2e7214f0f658ea30e897dc886269b717bc9d4b) [2018-11-02T04:47:34-2182bb0/freebsd-amd64-10_3](https://build.golang.org/log/8b749dbb3dbe338663d21b0ee5bb70c870a086cf) [2018-11-02T05:35:56-a70a2a8/darwin-amd64-race](https://build.golang.org/log/c6c123ae851bc4b78f0cb2fdb80785fdbe213eb5) [2018-11-02T07:30:03-f108158/darwin-amd64-10_12](https://build.golang.org/log/a6d865c434d56960067b9ec1cab0b01de41ce772) [2018-11-02T07:30:03-f108158/freebsd-amd64-10_3](https://build.golang.org/log/de5dc06493916785ab298ff974adf005fc8f1fd9) [2018-11-02T07:30:03-f108158/freebsd-amd64-10_4](https://build.golang.org/log/3f8700178c1b7a31f444a1b7c41b76448fce0985) [2018-11-02T12:48:25-86d3754/darwin-amd64-10_12](https://build.golang.org/log/1fa49af8e388f27b3bbdbddf5da21da4adfbaeae) [2018-11-02T12:48:25-86d3754/windows-amd64-race](https://build.golang.org/log/e7a09ffc0e0cc4d07cefdd6b4df530cd02101439) [2018-11-02T12:49:16-a86f549/solaris-amd64-oraclerel](https://build.golang.org/log/3ddd5847bd2aa0f37df4c27c68d66d0eb76c355e) [2018-11-02T12:50:03-a1ee0a2/darwin-amd64-10_12](https://build.golang.org/log/1a3ce8e2510840831891609c691a7af3a15bd901) [2018-11-02T12:50:03-a1ee0a2/solaris-amd64-oraclerel](https://build.golang.org/log/4acc66aada76ae1c8c4c317637c9b008244cc14a) [2018-11-02T12:53:20-31e7842/darwin-amd64-10_10](https://build.golang.org/log/a3be647c91f3496a47caa3b50bc41289fc82832e) [2018-11-02T12:55:58-21f7f01/solaris-amd64-oraclerel](https://build.golang.org/log/1620da070e1220fec36224e723eb1fdf651fc350) [2018-11-02T13:21:12-cdad408/darwin-amd64-10_11](https://build.golang.org/log/538de5f5abdec4e732ba281ff20d9ba70d8efd15) [2018-11-02T13:44:27-bd4b6ca/darwin-amd64-10_12](https://build.golang.org/log/e1cb08722e553450c53543008edc580afe615964) [2018-11-02T13:44:27-bd4b6ca/freebsd-amd64-12_0](https://build.golang.org/log/f55cf225bc70427fc0821c81b131fe8178ffc49c) [2018-11-02T15:56:35-3a0d609/darwin-amd64-10_12](https://build.golang.org/log/3808d79bacfe69be2fd2a519b83f13004d366f41) [2018-11-02T15:56:35-3a0d609/solaris-amd64-oraclerel](https://build.golang.org/log/316a461bffe7a5c209a7b729ddc80ca6087379f7) [2018-11-02T17:05:38-f08352b/darwin-amd64-10_11](https://build.golang.org/log/adbf6b9e302a4151fc654895ddef79f9734da01d) [2018-11-02T17:05:38-f08352b/darwin-amd64-10_12](https://build.golang.org/log/102e32f9529a196c109f17e2b73f98e8f1018442) [2018-11-02T17:05:38-f08352b/solaris-amd64-oraclerel](https://build.golang.org/log/3798247ed76e5ce5fa2ca576f038ab152e1898f7) [2018-11-02T17:53:18-e8df7df/darwin-amd64-10_10](https://build.golang.org/log/39517733445eee1850bbaafabb7bd3e1160b56bd) [2018-11-02T17:53:18-e8df7df/solaris-amd64-oraclerel](https://build.golang.org/log/f117a1aa90969b690eb61d546453303f4d62582b) [2018-11-02T17:56:07-745ec8b/darwin-amd64-10_11](https://build.golang.org/log/9471ee45f4e8ed841624be4b5a0816a6dbe9d155) [2018-11-02T17:56:07-745ec8b/darwin-amd64-10_12](https://build.golang.org/log/b3c92c0601ed0334c43b98af3cbaeda782bc848d) [2018-11-02T17:56:07-745ec8b/freebsd-amd64-10_3](https://build.golang.org/log/64e734915c843f0acd92e18bf03c087c99e616d9) [2018-11-02T19:43:41-c5d78f5/darwin-amd64-10_12](https://build.golang.org/log/468af3fe223eb641690658ccf9db6476e1602909) [2018-11-02T19:53:59-b2c397e/freebsd-amd64-10_3](https://build.golang.org/log/a4a9f966ac1db1a0d4c186b7ca3a95db467821ac) [2018-11-02T21:54:22-7aee799/freebsd-amd64-race](https://build.golang.org/log/95d656f485ff118c459ec2d52d6453b3a64dcd4e) [2018-11-02T21:54:38-ef21689/darwin-amd64-10_11](https://build.golang.org/log/7b5f159cd56b2e0ec3cf5323d05ff2194af5c4bd) [2018-11-02T21:54:52-84d6a7a/freebsd-amd64-12_0](https://build.golang.org/log/97d1df5db4f3336cb432d4a6b990f105f3bdfe8d) [2018-11-02T22:04:51-0663fe9/darwin-amd64-10_11](https://build.golang.org/log/fee547e31434df48c12c59780fba9f8224d40b62) [2018-11-02T22:04:51-0663fe9/darwin-amd64-10_12](https://build.golang.org/log/98b0c598a0668cb220a336761bbdccd5d79b6868) [2018-11-02T22:05:06-7f5dce0/windows-amd64-race](https://build.golang.org/log/0e6774ae519f7134c3b3cf07732645f202bdeed6) [2018-11-02T22:05:52-ee7e443/freebsd-amd64-12_0](https://build.golang.org/log/ba8428652cefae18d5fc33c06596cf3ae29a8f43) [2018-11-02T22:07:02-4caa127/freebsd-amd64-12_0](https://build.golang.org/log/4c65dcb01988d2691f3d727025f23448efab5ceb) [2018-11-02T22:07:43-c21ba09/windows-amd64-race](https://build.golang.org/log/39555addc3fa4e1359b37201fec7edea5827905f) [2018-11-02T22:17:47-e25823e/dragonfly-amd64](https://build.golang.org/log/8fea9e8ca48850ea9487d846554bbfd821a9acea) [2018-11-02T22:17:47-e25823e/freebsd-amd64-12_0](https://build.golang.org/log/5364284f80df52de23d83194bf08e7c0f9a7f807) [2018-11-02T22:47:58-3813edf/freebsd-amd64-12_0](https://build.golang.org/log/453d98ef069695478608d3e05fa217d6f4f6bf05) [2018-11-02T23:22:57-1645dfa/darwin-amd64-10_12](https://build.golang.org/log/258b344ed157a8900ac2ee186873522c7bce1d3e)
The builders have recently started showing a number of timeouts running
TestCompareStrings. Why?In case it's a compiler issue, CC @randall77 @josharian @martisch
2018-10-30T16:23:44-f570b54/solaris-amd64-oraclerel
2018-10-30T17:09:42-5168fcf/freebsd-amd64-12_0
2018-10-30T17:45:19-f14067f/darwin-amd64-10_10
2018-10-30T17:45:19-f14067f/freebsd-amd64-10_3
2018-10-31T13:47:42-49dafc7/darwin-amd64-10_11
2018-10-31T13:47:42-49dafc7/windows-amd64-race
2018-10-31T13:55:01-e8ffb8a/windows-amd64-race
2018-10-31T15:07:05-53856c4/darwin-amd64-10_12
2018-10-31T16:11:20-cb07f49/darwin-amd64-10_11
2018-10-31T16:11:20-cb07f49/darwin-amd64-10_12
2018-10-31T16:11:20-cb07f49/windows-amd64-race
2018-10-31T16:29:40-86ad85c/darwin-amd64-10_12
2018-10-31T19:29:56-f6f27bf/windows-amd64-race
2018-10-31T22:14:09-d086c5c/darwin-amd64-10_10
2018-10-31T22:48:13-4b05c01/freebsd-amd64-10_3
2018-11-01T00:54:46-01f0dbb/windows-amd64-race
2018-11-01T08:36:12-6c9b655/darwin-amd64-10_12
2018-11-01T14:38:45-21d2e15/darwin-amd64-10_11
2018-11-01T15:56:48-0ff6e5f/dragonfly-amd64
2018-11-02T00:52:46-914a25c/windows-amd64-race
2018-11-02T04:47:34-2182bb0/freebsd-amd64-10_3
2018-11-02T05:35:56-a70a2a8/darwin-amd64-race
2018-11-02T07:30:03-f108158/darwin-amd64-10_12
2018-11-02T07:30:03-f108158/freebsd-amd64-10_3
2018-11-02T07:30:03-f108158/freebsd-amd64-10_4
2018-11-02T12:48:25-86d3754/darwin-amd64-10_12
2018-11-02T12:48:25-86d3754/windows-amd64-race
2018-11-02T12:49:16-a86f549/solaris-amd64-oraclerel
2018-11-02T12:50:03-a1ee0a2/darwin-amd64-10_12
2018-11-02T12:50:03-a1ee0a2/solaris-amd64-oraclerel
2018-11-02T12:53:20-31e7842/darwin-amd64-10_10
2018-11-02T12:55:58-21f7f01/solaris-amd64-oraclerel
2018-11-02T13:21:12-cdad408/darwin-amd64-10_11
2018-11-02T13:44:27-bd4b6ca/darwin-amd64-10_12
2018-11-02T13:44:27-bd4b6ca/freebsd-amd64-12_0
2018-11-02T15:56:35-3a0d609/darwin-amd64-10_12
2018-11-02T15:56:35-3a0d609/solaris-amd64-oraclerel
2018-11-02T17:05:38-f08352b/darwin-amd64-10_11
2018-11-02T17:05:38-f08352b/darwin-amd64-10_12
2018-11-02T17:05:38-f08352b/solaris-amd64-oraclerel
2018-11-02T17:53:18-e8df7df/darwin-amd64-10_10
2018-11-02T17:53:18-e8df7df/solaris-amd64-oraclerel
2018-11-02T17:56:07-745ec8b/darwin-amd64-10_11
2018-11-02T17:56:07-745ec8b/darwin-amd64-10_12
2018-11-02T17:56:07-745ec8b/freebsd-amd64-10_3
2018-11-02T19:43:41-c5d78f5/darwin-amd64-10_12
2018-11-02T19:53:59-b2c397e/freebsd-amd64-10_3
2018-11-02T21:54:22-7aee799/freebsd-amd64-race
2018-11-02T21:54:38-ef21689/darwin-amd64-10_11
2018-11-02T21:54:52-84d6a7a/freebsd-amd64-12_0
2018-11-02T22:04:51-0663fe9/darwin-amd64-10_11
2018-11-02T22:04:51-0663fe9/darwin-amd64-10_12
2018-11-02T22:05:06-7f5dce0/windows-amd64-race
2018-11-02T22:05:52-ee7e443/freebsd-amd64-12_0
2018-11-02T22:07:02-4caa127/freebsd-amd64-12_0
2018-11-02T22:07:43-c21ba09/windows-amd64-race
2018-11-02T22:17:47-e25823e/dragonfly-amd64
2018-11-02T22:17:47-e25823e/freebsd-amd64-12_0
2018-11-02T22:47:58-3813edf/freebsd-amd64-12_0
2018-11-02T23:22:57-1645dfa/darwin-amd64-10_12