#14074: fdReadBuf001 fails non-deterministically on FreeBSD --------------------------------------+--------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Keywords: | Operating System: FreeBSD Architecture: x86_64 (amd64) | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------------+--------------------------------- With this patch to `libraries/unix`, {{{#!patch diff --git a/tests/fdReadBuf001.hs b/tests/fdReadBuf001.hs index 4c121a2..f987c94 100644 --- a/tests/fdReadBuf001.hs +++ b/tests/fdReadBuf001.hs @@ -21,7 +21,7 @@ main = do r <- fdReadBuf rd p block let (chunk,rest) = splitAt (fromIntegral r) text chars <- peekArray (fromIntegral r) p - when (chars /= chunk) $ error "mismatch" + when (chars /= chunk) $ error $ "mismatch: expected="++show chunk++", found="++show chars when (null rest) $ exitWith ExitSuccess loop rest loop bytes }}} `fdReadBuf001` sometimes fails under the ghci way on FreeBSD 11.0 with something like, {{{ =====> fdReadBuf001(ghci) 1 of 1 [0, 0, 0] cd "../../libraries/unix/tests/fdReadBuf001.run" && "/home/ben/ghc-8.2.1/bin/ghc" fdReadBuf001.hs -dcore-lint -dcmm-lint -no- user-package-db -rtsopts -fno-warn-missed-specialisations -fshow-warning- groups -fdiagnostics-color=never -fno-diagnostics-show-caret -dno-debug- output --interactive -v0 -ignore-dot-ghci -fno-ghci-history +RTS -I0.1 -RTS -package unix< fdReadBuf001.genscript Wrong exit code for fdReadBuf001(ghci) (expected 0 , actual 1 ) Stderr ( fdReadBuf001 ): fdReadBuf001: mismatch: expected=[101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,12 0,121,122,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112], found=[168,149,144,14,8,0,0,0,58,1,0,0,0,0,0,0,32,228,123,10,8,0,0,0,200,149,144,14,8,0,0,0,0,150,144,14,8,0,0,0,96,127,174,10,8,0,0,0,33,152,144,14,8,0,0,0,0,150,144,14,8,0,0,0,42,0,0,0,0,0,0,0,96,127,174,10,8,0,0,0,162,21,74,13,8,0,0,0,56,150,144,14,8,0,0,0,96,127,174,10,8,0,0,0,10,152,144,14,8,0,0,0,56,150,144,14,8,0,0,0,32,228,123,10,8,0,0,0,200,149,144,14,8,0,0,0,112,150,144,14,8,0,0,0,112,209,123,10,8,0,0,0,138,150,144,14,8,0,0,0,88,150,144,14,8,0,0,0,96,127,174,10,8,0,0,0,249,150,144,14,8,0,0,0,48,187,247,9,8,0,0,0,129,223,208,10,8,0,0,0,96,127,174,10,8,0,0,0,9,151,144,14,8,0,0,0,16,46,250,9,8,0,0,0,184,150,144,14,8,0,0,0,224,227,123,10,8,0,0,0,111,0,0,0,0,0,0,0,8,246,255,9,8,0,0,0,111,0,0,0,0,0,0,0,224,0,194,9,8,0,0,0] CallStack (from HasCallStack): error, called at fdReadBuf001.hs:24:36 in main:Main }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14074 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler