#10618: HEAD@d71b65f53a panics: ``get_op (--$)'' -------------------------------------+------------------------------------- Reporter: bjmprice | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.11 Keywords: | Operating System: Linux Architecture: x86_64 | Type of failure: Compile-time (amd64) | crash Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- (Note that 7.10.1 works as expected) This one line generates a panic: {{{#!hs panic = GarbageConstructorName $ a --$ b }}} (in an otherwise blank file, when passed to {{{ghc }}} or {{{ghci}}}. Just the right hand side panics {{{ghci}}} interactively.) Error message: {{{ ghc-stage2: panic! (the 'impossible' happened) (GHC version 7.11.20150708 for x86_64-unknown-linux): get_op (--$) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} {{{uname -a: Linux cam-05-unx 3.5.0-54-generic #81~precise1-Ubuntu SMP Tue Jul 15 04:02:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux}}} {{{ gcc -v: Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program- suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable- libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable- objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable- checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) }}} With {{{ghc -v}}} (Was built with {{{BuildFlavour = devel2}}}, default {{{build.mk}}} otherwise): {{{ Glasgow Haskell Compiler, Version 7.11.20150708, stage 2 booted by GHC version 7.8.2 Using binary package database: /5playpen/t-bepric/ghc- build/inplace/lib/package.conf.d/package.cache wired-in package ghc-prim mapped to ghc-prim-0.4.0.0-inplace wired-in package integer-gmp mapped to integer-gmp-1.0.0.0-inplace wired-in package base mapped to base-4.8.2.0-inplace wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.10.0.0-inplace wired-in package ghc mapped to ghc-7.11.20150708-inplace wired-in package dph-seq not found. wired-in package dph-par not found. Hsc static flags: wired-in package ghc-prim mapped to ghc-prim-0.4.0.0-inplace wired-in package integer-gmp mapped to integer-gmp-1.0.0.0-inplace wired-in package base mapped to base-4.8.2.0-inplace wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.10.0.0-inplace wired-in package ghc mapped to ghc-7.11.20150708-inplace wired-in package dph-seq not found. wired-in package dph-par not found. *** Chasing dependencies: Chasing modules from: *GetOpCrash.hs Stable obj: [] Stable BCO: [] Ready for upsweep [NONREC ModSummary { ms_hs_date = 2015-07-08 15:09:13 UTC ms_mod = Main, ms_textual_imps = [import (implicit) Prelude] ms_srcimps = [] }] *** Deleting temp files: Deleting: compile: input file GetOpCrash.hs Created temporary directory: /tmp/ghc22576_0 *** Checking old interface for Main: [1 of 1] Compiling Main ( GetOpCrash.hs, GetOpCrash.o ) *** Parser: *** Renamer/typechecker: *** Deleting temp files: Deleting: /tmp/ghc22576_0/ghc_1.s Warning: deleting non-existent /tmp/ghc22576_0/ghc_1.s *** Deleting temp dirs: Deleting: /tmp/ghc22576_0 ghc-stage2: panic! (the 'impossible' happened) (GHC version 7.11.20150708 for x86_64-unknown-linux): get_op (--$) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10618 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler