#15005: GHC fails with “StgCmmEnv: variable not found” when trying to compile order-maintenance-0.2.1.0 -------------------------------------+------------------------------------- Reporter: jeltsch | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.4.3 Component: Compiler | Version: 8.4.2-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by sjakobi): I cannot reproduce the panic with ghc-HEAD (`c2f90c84e`) or ghc v8.5.20180306 from hvr's PPA. It is interesting (but possibly unrelated) that the testsuite for `order- maintenance` fails when built with ghc-HEAD. With ghc-8.2.2 it passes. {{{ ~/tmp/order-maintenance-0.2.1.0 $ cabal new-test -w ~/src/ghc/inplace/bin /ghc-stage2 -O1 --allow-newer Build profile: -w ghc-8.5.20180402 -O1 In order, the following will be built (use -v for more details): - order-maintenance-0.2.1.0 (test:tests) (first run) Preprocessing test suite 'tests' for order-maintenance-0.2.1.0.. Building test suite 'tests' for order-maintenance-0.2.1.0.. [1 of 1] Compiling Main ( /home/simon/tmp/order- maintenance-0.2.1.0/dist-newstyle/build/x86_64-linux/ghc-8.5.20180402 /order-maintenance-0.2.1.0/t/tests/build/testsStub/testsStub- tmp/testsStub.hs, /home/simon/tmp/order-maintenance-0.2.1.0/dist- newstyle/build/x86_64-linux/ghc-8.5.20180402/order- maintenance-0.2.1.0/t/tests/build/testsStub/testsStub-tmp/Main.o ) Linking /home/simon/tmp/order-maintenance-0.2.1.0/dist- newstyle/build/x86_64-linux/ghc-8.5.20180402/order- maintenance-0.2.1.0/t/tests/build/testsStub/testsStub ... Running 1 test suites... Test suite tests: RUNNING... Test case Dumb vs. Dietz and Sleator O(log n) amortized time: Fail "(after 14 tests and 5 shrinks):Exception: Map.!: given key is not an element in the map CallStack (from HasCallStack): error, called at libraries/containers/Data/Map/Internal.hs:610:17 in containers-0.5.11.0:Data.Map.InternalnewMinimum -> x_1, newAfter x_1 -> x_2, newMinimum -> x_3, newBefore x_2 -> x_4, newAfter x_4 -> x_5, delete x_1, newBefore x_1 -> x_7" Test suite tests: FAIL ... }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15005#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler