Bug 1495293 - Set RUSTC_BOOTSTRAP in the taskcluster task definition instead of the mozconfig. r=froydnj

browser/config/mozconfigs/linux64/debug-searchfox-clang

@@ -13,8 +13,8 @@ ac_add_options --enable-dmd
 export CC="$topsrcdir/clang/bin/clang"
 export CXX="$topsrcdir/clang/bin/clang++"
 
-# Save rust analysis (this requires unlocking the unstable features)
-export RUSTC_BOOTSTRAP=1
+# Save rust analysis (this requires unlocking the unstable features,
+# which is done in the taskcluster task definition via RUSTC_BOOTSTRAP)
 export RUSTFLAGS="-Zsave-analysis"
 
 # Add the static checker

browser/config/mozconfigs/macosx64/debug-searchfox

@@ -7,8 +7,8 @@ MOZ_AUTOMATION_L10N_CHECK=0
 ac_add_options --enable-debug
 ac_add_options --enable-dmd
 
-# Save rust analysis (this requires unlocking the unstable features)
-export RUSTC_BOOTSTRAP=1
+# Save rust analysis (this requires unlocking the unstable features,
+# which is done in the taskcluster task definition via RUSTC_BOOTSTRAP)
 export RUSTFLAGS="-Zsave-analysis"
 
 ac_add_options --enable-clang-plugin

taskcluster/ci/searchfox/kind.yml

@@ -35,6 +35,7 @@ jobs:
             max-run-time: 36000
             env:
                 PERFHERDER_EXTRA_OPTIONS: searchfox
+                RUSTC_BOOTSTRAP: "1"
         run:
             using: mozharness
             actions: [build]
@@ -62,6 +63,7 @@ jobs:
             env:
                 TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/macosx64/cross-releng.manifest"
                 PERFHERDER_EXTRA_OPTIONS: searchfox
+                RUSTC_BOOTSTRAP: "1"
         run:
             using: mozharness
             actions: [get-secrets build]