cannot build rustc with -g

[nikomatsakis]

When I try to bootstrap the compiler with RUSTFLAGS=-g, I get the following result:

!dbg attachment points at wrong subprogram for function
!157160 = !DISubprogram(name: "fnfn", linkageName: "fnfn", scope: !157144, file: !157144, line: 38, type: !46087, isLocal: true, isDefinition: true, scopeLine: 38, flags: DIFlagPrototyped, isOptimized: t\
rue, function: i64 (%closure.1177*, %"ast::Expr"*)* @_ZN3ext6expand11expand_expr13closure.70644E, templateParams: !1064, variables: !157161)
i64 (%closure.1177*, %"ast::Expr"*)* @_ZN3ext6expand11expand_expr13closure.70644E
  tail call void @llvm.dbg.value(metadata %"ext::expand::IdentRenamer"* %rename_fld.i.857, i64 0, metadata !157531, metadata !191193), !dbg !784008
!784008 = !DILocation(line: 113, scope: !157525, inlinedAt: !784009)
!784010 = distinct !DILexicalBlock(scope: !784011, file: !157144, line: 129, column: 56)
!160778 = !DISubprogram(name: "fnfn", linkageName: "fnfn", scope: !157144, file: !157144, line: 129, type: !160779, isLocal: true, isDefinition: true, scopeLine: 129, flags: DIFlagPrototyped, isOptimized\
: true, templateParams: !1064, variables: !160781)
LLVM ERROR: Broken function found, compilation aborted!
m

cc @rust-lang/compiler @michaelwoerister

[dotdash]

Stage 0? Looks like the LLVM bug for which we recently cherry-picked a
bugfix. Probably works in stage 1 and just needs a new snapshot
Am 19.11.2015 11:23 schrieb "Niko Matsakis" notifications@github.com:

When I build with RUSTFLAGS=-g, I get the following result:

!dbg attachment points at wrong subprogram for function
!157160 = !DISubprogram(name: "fnfn", linkageName: "fnfn", scope: !157144, file: !157144, line: 38, type: !46087, isLocal: true, isDefinition: true, scopeLine: 38, flags: DIFlagPrototyped, isOptimized: t
rue, function: i64 (%closure.1177_, %"ast::Expr")* @ZN3ext6expand11expand_expr13closure.70644E, templateParams: !1064, variables: !157161)
i64 (%closure.1177, %"ast::Expr")* @_ZN3ext6expand11expand_expr13closure.70644E
tail call void @llvm.dbg.value(metadata %"ext::expand::IdentRenamer"* %rename_fld.i.857, i64 0, metadata !157531, metadata !191193), !dbg !784008
!784008 = !DILocation(line: 113, scope: !157525, inlinedAt: !784009)
!784010 = distinct !DILexicalBlock(scope: !784011, file: !157144, line: 129, column: 56)
!160778 = !DISubprogram(name: "fnfn", linkageName: "fnfn", scope: !157144, file: !157144, line: 129, type: !160779, isLocal: true, isDefinition: true, scopeLine: 129, flags: DIFlagPrototyped, isOptimized
: true, templateParams: !1064, variables: !160781)
LLVM ERROR: Broken function found, compilation aborted!
m

cc @rust-lang/compiler https://github.com/orgs/rust-lang/teams/compiler
@michaelwoerister https://github.com/michaelwoerister

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#29923.

[nikomatsakis]

That'd be nice! (Testing that theory now...)

[nikomatsakis]

Yes, this is the problem.

[sanxiyn]

A new snapshot is done, closing. (This is also tested by auto-linux-64-debug-opt on buildbot now.)