Bug 11939 – selective imports inside a scope(failure) block cause compiler segfault

dmd (git master, cb5ace9) and ldc (merge-2.065 branch, fc8ddb) segfault when compiling the following, as does dpaste with its dmd 2.064.2 compiler (http://dpaste.dzfl.pl/e071e049): --------------------------------------- import std.stdio; void main() { scope(failure) { import std.string : toUpper; writeln("nanana".toUpper); } writeln("hello world!"); } --------------------------------------- Changing the import line to instead import all of std.string makes it compile again. scope(success) and scope(exit) don't seem to trigger this behavior. gdb output is as follows: --------------------------------------- Program received signal SIGSEGV, Segmentation fault. Dsymbol::search_correct (this=0x857d80, ident=0x1) at dsymbol.c:436 436 return (Dsymbol *)speller(ident->toChars(), &symbol_search_fp, (void *)this, idchars); (gdb) bt #0 Dsymbol::search_correct (this=0x857d80, ident=0x1) at dsymbol.c:436 #1 0x00000000004928ea in Import::semantic (this=0x857d80, sc=0x45b5c00) at import.c:263 #2 0x00000000004e5233 in ImportStatement::semantic (this=0x857ea0, sc=0x45b3e50) at statement.c:5406 #3 0x00000000004eb53a in CompoundStatement::semantic (this=0x45bb4c0, sc=0x45b3e50) at statement.c:635 #4 0x00000000004e865a in ScopeStatement::semantic (this=0x858260, sc=0x45b3e50) at statement.c:1071 #5 0x00000000004eb53a in CompoundStatement::semantic (this=0x45ba8b0, sc=0x3d44cb0) at statement.c:635 #6 0x00000000004edd84 in Catch::semantic (this=this@entry=0x45ba910, sc=0x3d44cb0, sc@entry=0x3d44bb0) at statement.c:4768 #7 0x00000000004edf29 in TryCatchStatement::semantic (this=0x45ba950, sc=0x3d44bb0) at statement.c:4594 #8 0x00000000004eba75 in CompoundStatement::semantic (this=0x8583d0, sc=0x3d44bb0) at statement.c:692 #9 0x0000000000474ea9 in FuncDeclaration::semantic3 (this=<optimized out>, sc=0x3d448c0) at func.c:1330 #10 0x00000000004a7120 in Module::semantic3 (this=this@entry=0x8573a0) at module.c:811 #11 0x00000000004a48dc in tryMain (argc=9, argv=0x863140) at mars.c:1546 #12 0x00007ffff6ff8de5 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6 #13 0x0000000000402e45 in _start () (gdb) explore value ident 'ident' is a pointer to a value of type 'Identifier' Continue exploring it as a pointer to a single value [y/n]: y 'ident' a pointer pointing to an invalid memory location.

void test11939() { scope(failure) { import object : Object; } throw new Exception(""); } https://github.com/D-Programming-Language/dmd/pull/3206

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/0084fe621b86ee022d05822b8f46adbabfec23f1 Fix Issue 11939 - selective imports inside a scope(failure) block cause compiler segfault https://github.com/D-Programming-Language/dmd/commit/b85715496da22739e796f904c68c30379b7bed08 Merge pull request #3206 from yebblies/issue11939 Issue 11939 - selective imports inside a scope(failure) block cause compiler segfault

Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/c797a152278e649364fcaa57794134fca53b89b0 Remove workaround for issue 11939