#5338: Race hazard in Random library test suite
---------------------------------+------------------------------------------
Reporter: simonpj | Owner: rrnewton@…
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.0.3
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
---------------------------------+------------------------------------------
In a validate run, `rangeTest` fails thus
{{{
=====> rangeTest(normal) 2838 of 2886 [0, 4, 0]
cd ../../../libraries/random/tests &&
'/64playpen/simonpj/builds/HEAD-1/bindisttest/install dir/bin/ghc'
-fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-
conf -rtsopts -o rangeTest rangeTest.hs -i.. -XCPP
>rangeTest.comp.stderr 2>&1
=====> random1283(normal) 2839 of 2886 [0, 4, 0]
cd ../../../libraries/random/tests &&
'/64playpen/simonpj/builds/HEAD-1/bindisttest/install dir/bin/ghc'
-fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-
conf -rtsopts -o random1283 random1283.hs -i.. -XCPP -package
containers >random1283.comp.stderr 2>&1
Compile failed (status 256) errors were:
[1 of 2] Compiling System.Random ( ../System/Random.hs,
../System/Random.o )
[2 of 2] Compiling Main ( rangeTest.hs, rangeTest.o )
Linking rangeTest ...
../System/Random.o: file not recognized: File truncated
collect2: ld returned 1 exit status
*** unexpected failure for rangeTest(normal)
}}}
Ian writes:
The problem is this, in libraries/random/tests/all.T:
{{{
# This lets me run tests from the test directory during development:
opts = '-i.. -XCPP '
}}}
This is causing all the tests to compile the source, rather than using
the package. If two of the tests get run in parallel then there is a
race condition.
Ryan, could you handle this differently, so those flags don't get passed
by default, please? Perhaps have them conditionally set, based on
whether a file has been 'touch'ed or whether a make variable has been
set, or maybe make a testsuite wrapper for yourself which builds the
package so that they aren't necessary?
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5338>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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