#11978: running a profiled build of shake test suite with rts args +RTS -hb -N10 triggers SIGSEGV ---------------------------------+---------------------------------------- Reporter: carter | Owner: Type: bug | Status: new Priority: highest | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: MacOS X | Architecture: Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #4820 | Differential Rev(s): Wiki Page: | ---------------------------------+---------------------------------------- Description changed by carter: @@ -1,1 +1,1 @@ - on my 4 core macbook pro i can reliably get a sigsev when running the + on my 4 core macbook pro i can reliably get a sigsegv when running the New description: on my 4 core macbook pro i can reliably get a sigsegv when running the shake test suite with profiling enabled and the RTS flags +RTS -hb -N10 steps to reproduce (with either ghc 7.10.3 or an 8.0 RC4 build) {{{ cabal get --source shake cd shake # shake master was commit f0c0ce8d4c2c017b9a26b5d4258e07d881f4cde1 as of time of testing # but problem should happen with eg 0.15.6 too cabal install # this is so that the shake test suite can fine the right template file cabal install --only-dep --enable-tests --enable-profiling ./dist/build/shake-test/shake-test +RTS -hb -N10 }}} this last command yields the error {{{ ****************************************************************** ** Running shake test suite, run with '--help' to see arguments ** ****************************************************************** fish: './dist/build/shake-test/shake-t…' terminated by signal SIGSEGV (Address boundary error) }}} i can also trigger the bug reported in #4820 by running the test suite with the -hr flag rather than -hb I'm marking this as HIGHEST so it can be discussed, because the profiiling build of the shake test suite only seems to crash *if* the test suite is run with -hb or -hr flags, which seems like a pretty nasty bug (which colleagues have it in other code) nb: `./dist/build/shake-test/shake-test +RTS -N10 ` runs into a not enough stack space error before the shake test suite completes, but `./dist/build/shake-test/shake-test +RTS -K1G -N10 ` seems to work fine, though the crashes happen super early in the gargantuan test suite the analogous output for reproducing #4820 is : {{{ ./dist/build/shake-test/shake-test +RTS -hr -N10 ****************************************************************** ** Running shake test suite, run with '--help' to see arguments ** ****************************************************************** Longest file modification time lag was 1005ms ## BUILD tar test ## TESTING tar ## BUILD tar --abbrev=output=$OUT -j3 Writing report to $OUT/tar/report.html Build completed in 0:01m ## BUILD tar --no-build --report=- Warning: No want/action statements, nothing to do Writing report to output/tar/report.html Writing report to - * This database has tracked 1 runs. * There are 4 rules (4 rebuilt in the last run). * Building required 1 traced commands (1 in the last run). * The total (unparallelised) time is 0.01s of which 0.01s is traced commands. * The longest rule takes 0.01s (output/tar/result.tar), and the longest traced command takes 0.01s (tar). * Last run gave an average parallelism of 0.44 times over 0.01s. Build completed in 0:01m ## BUILD tar Writing report to output/tar/report.html Build completed in 0:01m ## FINISHED TESTING tar ## BUILD self test ## TESTING self ## BUILD self --abbrev=output=$OUT -j3 Writing report to $OUT/self/report.html Build completed in 0:01m ## BUILD self --no-build --report=- Warning: No want/action statements, nothing to do Writing report to output/self/report.html Writing report to - * This database has tracked 2 runs. * There are 460 rules (2 rebuilt in the last run). * Building required 56 traced commands (1 in the last run). * The total (unparallelised) time is 22.73s of which 22.33s is traced commands. * The longest rule takes 1.11s (output/self/Development/Shake/Types.o output/self/Development/Shake/Types.hi), and the longest traced command takes 1.11s (ghc). * Last run gave an average parallelism of 0.78 times over 0.05s. Build completed in 0:01m ## BUILD self shake-test: internal error: Invalid object in isRetainer(): 39 (GHC version 8.0.0.20160421 for x86_64_apple_darwin) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11978#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler