#14880: GHC panic: updateRole -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.2.2 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: #15076 | Differential Rev(s): Phab:D4769 Wiki Page: | -------------------------------------+------------------------------------- Comment (by tdammers): Looks like step 0 already introduces a performance regression: {{{ Unexpected results from: TEST="T9630" SUMMARY for test run started at Mon Sep 10 12:56:45 2018 CEST 0:06:01 spent to go through 110 total tests, which gave rise to 526 test cases, of which 416 were skipped 4 had missing libraries 105 expected passes 0 expected failures 0 caused framework failures 0 caused framework warnings 0 unexpected passes 0 unexpected failures 1 unexpected stat failures Unexpected stat failures: compiler/T9630.run T9630 [stat not good enough] (normal) }}} That one test deviates by +15% allocations. (The relevant patch: http://git.haskell.org/ghc.git/commitdiff/c8a1f9c42a37eb0c3514aef1a716fdbcb9...) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14880#comment:115 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler